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(b) The excited He*(21S0) atom collides with an unexcited Ne atom and the atoms exchange internal energy, with an unexcited He atom and excited Ne atom, written Ne*(3S2), resulting. This energy exchange process occurs with high probability only because of the accidental near equality of the two excitation energies of the two levels in these atoms. (c) The 3S2 level of Ne is an example of a metastable atomic state, meaning that it is only after a relatively long period of time - on atomic time scales - that the Ne*(3S2) atom deexcites to the 2P4 level by emitting a photon of wavelength 6328 Å. It is this emission of 6328 Å light by Ne atoms that, in the presence of a suitable optical configuration, leads to lasing action. (d) The excited Ne*(2P4) atom rapidly deexcites to its ground state by emitting additional photons or by collisions with the plasma tube walls. Because of the extreme quickness of the deexcitation process, at any moment in the HeNe plasma, there are more Ne atoms in the 3S2 state than there are in the 2P4 state, and a population inversion is said to be established between these two levels. When a population inversion is established between the 3S2 and 2P4 levels of the Ne atoms in the discharge, the discharge can act as an optical gain or amplification medium for light of wavelength 6328 Å. This is because a photon incident on the gas discharge will have a greater probability of being replicated in a 3S2-->2P4 stimulated emission process (discussed below) than of being destroyed in the complementary 2P4-->3S2 absorption process. (3) Optical resonator or cavity. As mentioned in 2(c) above, Ne atoms in the 3S2 metastable state decay spontaneously to the 2P4 level after a relatively long period of time under normal circumstances; however, a novel circumstance arises if, as shown in Fig. 2, a HeNe discharge is placed between two highly reflecting mirrors that form an optical cavity or resonator along the axis of the discharge. When a resonator structure is in place, photons from the Ne* 3S2-->2P4 transition that are emitted along the axis of the cavity can be reflected hundreds of times between the two highly reflecting end mirrors of the cavity. These reflecting photons can interact with other excited Ne*(3S2) atoms and cause them to emit 6328 Å light in a process known as stimulated emission. The new photon produced in stimulated emission has the same wavelength and polarization, and is emitted in the same direction, as the stimulating photon. It is sometimes useful for purposes of analogy to think of the stimulated emission process as a "cloning" process for photons, as depicted in Fig. 4. The stimulated emission process should be contrasted with spontaneous emission processes that, because they are not caused by any preceding event, produce photons that are emitted isotropically, with random polarization, and over a broader range of wavelengths. As stimulated emission processes occur along the axis of the resonator a situation develops in which essentially all 3S2-->2P4 Ne* decays contribute deexcitation photons to the photon stream reflecting between the two mirrors. This photon multiplication (light amplification) process produces a very large number of photons of the same wavelength and polarization that travel back and forth between the two cavity mirrors. To extract a light beam from the resonator, it is only necessary to have one of the two resonator mirrors, usually called the output coupler, have a reflectivity of only 99% so that 1% of the photons incident on it travel out of the resonator to produce an external laser beam. The other mirror, called the high reflector, should be as reflective as possible. The small diameter, narrow bandwidth, and strong polarization of the HeNe laser beam are determined by the properties of the resonator mirrors and other optical components that lie along the axis of the optical resonator. Back

Think about the opposing needs of a toddler and a parent. The child’s need is to explore, so venturing to the street or the cliff edge meets that need. But the parent’s need is to protect the child’s safety, a need that can only be met by limiting the toddler’s exploration. Since these needs are at odds, conflict arises.

When you can recognize conflicting needs and are willing to examine them with compassion and understanding, it can lead to creative problem solving, team building, and stronger relationships.

A 1400 V high voltage, DC power supply maintains a glow discharge or plasma in a glass tube containing an optimal mixture (typically 5:1 to 7:1) of helium and neon gas, as shown in Fig. 1 and indicated in the diagram of Fig. 2. The discharge current is limited to about 5 mA by a 91 kW ballast resistor. Energetic electrons accelerating from the cathode to the anode collide with He and Ne atoms in the laser tube, producing a large number of neutral He and Ne atoms in excited states. He and Ne atoms in excited states can deexcite and return to their ground states by spontaneously emitting light. This light makes up the bright pink-red glow of the plasma that is seen even in the absence of laser action.

To achieve laser action it is necessary to have a large number of atoms in excited states and to establish what is termed a population inversion. To understand the significance of a population inversion to HeNe laser action, it is useful to consider the processes leading to excitation of He and Ne atoms in the discharge, using the simplified diagram of atomic He and Ne energy levels given in Fig. 3. A description of the rather complex HeNe excitation process can be given in terms of the following four steps. (a) An energetic electron collisionally excites a He atom to the state labeled 21S0 in Fig. 3. A He atom in this excited state is often written He*(21S0), where the asterisk means that the He atom is in an excited state. (b) The excited He*(21S0) atom collides with an unexcited Ne atom and the atoms exchange internal energy, with an unexcited He atom and excited Ne atom, written Ne*(3S2), resulting. This energy exchange process occurs with high probability only because of the accidental near equality of the two excitation energies of the two levels in these atoms. (c) The 3S2 level of Ne is an example of a metastable atomic state, meaning that it is only after a relatively long period of time - on atomic time scales - that the Ne*(3S2) atom deexcites to the 2P4 level by emitting a photon of wavelength 6328 Å. It is this emission of 6328 Å light by Ne atoms that, in the presence of a suitable optical configuration, leads to lasing action. (d) The excited Ne*(2P4) atom rapidly deexcites to its ground state by emitting additional photons or by collisions with the plasma tube walls. Because of the extreme quickness of the deexcitation process, at any moment in the HeNe plasma, there are more Ne atoms in the 3S2 state than there are in the 2P4 state, and a population inversion is said to be established between these two levels. When a population inversion is established between the 3S2 and 2P4 levels of the Ne atoms in the discharge, the discharge can act as an optical gain or amplification medium for light of wavelength 6328 Å. This is because a photon incident on the gas discharge will have a greater probability of being replicated in a 3S2-->2P4 stimulated emission process (discussed below) than of being destroyed in the complementary 2P4-->3S2 absorption process. (3) Optical resonator or cavity. As mentioned in 2(c) above, Ne atoms in the 3S2 metastable state decay spontaneously to the 2P4 level after a relatively long period of time under normal circumstances; however, a novel circumstance arises if, as shown in Fig. 2, a HeNe discharge is placed between two highly reflecting mirrors that form an optical cavity or resonator along the axis of the discharge. When a resonator structure is in place, photons from the Ne* 3S2-->2P4 transition that are emitted along the axis of the cavity can be reflected hundreds of times between the two highly reflecting end mirrors of the cavity. These reflecting photons can interact with other excited Ne*(3S2) atoms and cause them to emit 6328 Å light in a process known as stimulated emission. The new photon produced in stimulated emission has the same wavelength and polarization, and is emitted in the same direction, as the stimulating photon. It is sometimes useful for purposes of analogy to think of the stimulated emission process as a "cloning" process for photons, as depicted in Fig. 4. The stimulated emission process should be contrasted with spontaneous emission processes that, because they are not caused by any preceding event, produce photons that are emitted isotropically, with random polarization, and over a broader range of wavelengths. As stimulated emission processes occur along the axis of the resonator a situation develops in which essentially all 3S2-->2P4 Ne* decays contribute deexcitation photons to the photon stream reflecting between the two mirrors. This photon multiplication (light amplification) process produces a very large number of photons of the same wavelength and polarization that travel back and forth between the two cavity mirrors. To extract a light beam from the resonator, it is only necessary to have one of the two resonator mirrors, usually called the output coupler, have a reflectivity of only 99% so that 1% of the photons incident on it travel out of the resonator to produce an external laser beam. The other mirror, called the high reflector, should be as reflective as possible. The small diameter, narrow bandwidth, and strong polarization of the HeNe laser beam are determined by the properties of the resonator mirrors and other optical components that lie along the axis of the optical resonator. Back

(2) Optical gain medium. To achieve laser action it is necessary to have a large number of atoms in excited states and to establish what is termed a population inversion. To understand the significance of a population inversion to HeNe laser action, it is useful to consider the processes leading to excitation of He and Ne atoms in the discharge, using the simplified diagram of atomic He and Ne energy levels given in Fig. 3. A description of the rather complex HeNe excitation process can be given in terms of the following four steps. (a) An energetic electron collisionally excites a He atom to the state labeled 21S0 in Fig. 3. A He atom in this excited state is often written He*(21S0), where the asterisk means that the He atom is in an excited state. (b) The excited He*(21S0) atom collides with an unexcited Ne atom and the atoms exchange internal energy, with an unexcited He atom and excited Ne atom, written Ne*(3S2), resulting. This energy exchange process occurs with high probability only because of the accidental near equality of the two excitation energies of the two levels in these atoms. (c) The 3S2 level of Ne is an example of a metastable atomic state, meaning that it is only after a relatively long period of time - on atomic time scales - that the Ne*(3S2) atom deexcites to the 2P4 level by emitting a photon of wavelength 6328 Å. It is this emission of 6328 Å light by Ne atoms that, in the presence of a suitable optical configuration, leads to lasing action. (d) The excited Ne*(2P4) atom rapidly deexcites to its ground state by emitting additional photons or by collisions with the plasma tube walls. Because of the extreme quickness of the deexcitation process, at any moment in the HeNe plasma, there are more Ne atoms in the 3S2 state than there are in the 2P4 state, and a population inversion is said to be established between these two levels. When a population inversion is established between the 3S2 and 2P4 levels of the Ne atoms in the discharge, the discharge can act as an optical gain or amplification medium for light of wavelength 6328 Å. This is because a photon incident on the gas discharge will have a greater probability of being replicated in a 3S2-->2P4 stimulated emission process (discussed below) than of being destroyed in the complementary 2P4-->3S2 absorption process. (3) Optical resonator or cavity. As mentioned in 2(c) above, Ne atoms in the 3S2 metastable state decay spontaneously to the 2P4 level after a relatively long period of time under normal circumstances; however, a novel circumstance arises if, as shown in Fig. 2, a HeNe discharge is placed between two highly reflecting mirrors that form an optical cavity or resonator along the axis of the discharge. When a resonator structure is in place, photons from the Ne* 3S2-->2P4 transition that are emitted along the axis of the cavity can be reflected hundreds of times between the two highly reflecting end mirrors of the cavity. These reflecting photons can interact with other excited Ne*(3S2) atoms and cause them to emit 6328 Å light in a process known as stimulated emission. The new photon produced in stimulated emission has the same wavelength and polarization, and is emitted in the same direction, as the stimulating photon. It is sometimes useful for purposes of analogy to think of the stimulated emission process as a "cloning" process for photons, as depicted in Fig. 4. The stimulated emission process should be contrasted with spontaneous emission processes that, because they are not caused by any preceding event, produce photons that are emitted isotropically, with random polarization, and over a broader range of wavelengths. As stimulated emission processes occur along the axis of the resonator a situation develops in which essentially all 3S2-->2P4 Ne* decays contribute deexcitation photons to the photon stream reflecting between the two mirrors. This photon multiplication (light amplification) process produces a very large number of photons of the same wavelength and polarization that travel back and forth between the two cavity mirrors. To extract a light beam from the resonator, it is only necessary to have one of the two resonator mirrors, usually called the output coupler, have a reflectivity of only 99% so that 1% of the photons incident on it travel out of the resonator to produce an external laser beam. The other mirror, called the high reflector, should be as reflective as possible. The small diameter, narrow bandwidth, and strong polarization of the HeNe laser beam are determined by the properties of the resonator mirrors and other optical components that lie along the axis of the optical resonator. Back

When conflict is mismanaged, it can cause great harm to a relationship, but when handled in a respectful, positive way, conflict provides an opportunity to strengthen the bond between two people. Whether you’re experiencing conflict at home, work, or school, learning these skills can help you resolve differences in a healthy way and build stronger, more rewarding relationships.

Your ability to accurately read another person depends on your own emotional awareness. The more aware you are of your own emotions, the easier it will be for you to pick up on the wordless clues that reveal what others are feeling. Think about what you are transmitting to others during conflict, and if what you say matches your body language. If you say “I’m fine,” but you clench your teeth and look away, then your body is clearly signaling you are anything but “fine.” A calm tone of voice, a reassuring touch, or an interested facial expression can go a long way toward relaxing a tense exchange.

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If you are out of touch with your feelings or so stressed that you can only pay attention to a limited number of emotions, you won’t be able to understand your own needs. This will make it hard to communicate with others and establish what’s really troubling you. For example, couples often argue about petty differences—the way she hangs the towels, the way he slurps his soup—rather than what is really bothering them.

Being able to manage and relieve stress in the moment is the key to staying balanced, focused, and in control, no matter what challenges you face. If you don’t know how to stay centered and in control of yourself, you will become overwhelmed in conflict situations and unable to respond in healthy ways.

Focus on the present. If you’re holding on to grudges based on past conflicts, your ability to see the reality of the current situation will be impaired. Rather than looking to the past and assigning blame, focus on what you can do in the here-and-now to solve the problem.

Do you fear conflict or avoid it at all costs? If your perception of conflict comes from painful memories from early childhood or previous unhealthy relationships, you may expect all disagreements to end badly. You may view conflict as demoralizing, humiliating, or something to fear. If your early life experiences left you feeling powerless or out of control, conflict may even be traumatizing for you.

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If any of these experiences are unfamiliar, your emotions may be “turned” down or even off. In either case, you may need help developing your emotional awareness. You can do this by using Helpguide’s free Emotional Intelligence Toolkit.

(3) Optical resonator or cavity. As mentioned in 2(c) above, Ne atoms in the 3S2 metastable state decay spontaneously to the 2P4 level after a relatively long period of time under normal circumstances; however, a novel circumstance arises if, as shown in Fig. 2, a HeNe discharge is placed between two highly reflecting mirrors that form an optical cavity or resonator along the axis of the discharge. When a resonator structure is in place, photons from the Ne* 3S2-->2P4 transition that are emitted along the axis of the cavity can be reflected hundreds of times between the two highly reflecting end mirrors of the cavity. These reflecting photons can interact with other excited Ne*(3S2) atoms and cause them to emit 6328 Å light in a process known as stimulated emission. The new photon produced in stimulated emission has the same wavelength and polarization, and is emitted in the same direction, as the stimulating photon. It is sometimes useful for purposes of analogy to think of the stimulated emission process as a "cloning" process for photons, as depicted in Fig. 4. The stimulated emission process should be contrasted with spontaneous emission processes that, because they are not caused by any preceding event, produce photons that are emitted isotropically, with random polarization, and over a broader range of wavelengths. As stimulated emission processes occur along the axis of the resonator a situation develops in which essentially all 3S2-->2P4 Ne* decays contribute deexcitation photons to the photon stream reflecting between the two mirrors. This photon multiplication (light amplification) process produces a very large number of photons of the same wavelength and polarization that travel back and forth between the two cavity mirrors. To extract a light beam from the resonator, it is only necessary to have one of the two resonator mirrors, usually called the output coupler, have a reflectivity of only 99% so that 1% of the photons incident on it travel out of the resonator to produce an external laser beam. The other mirror, called the high reflector, should be as reflective as possible. The small diameter, narrow bandwidth, and strong polarization of the HeNe laser beam are determined by the properties of the resonator mirrors and other optical components that lie along the axis of the optical resonator. Back

Make conflict resolution the priority rather than winning or “being right.” Maintaining and strengthening the relationship, rather than “winning” the argument, should always be your first priority. Be respectful of the other person and their viewpoint.

Although knowing your own feelings may sound simple, many people ignore or try to sedate strong emotions like anger, sadness, and fear. Your ability to handle conflict, however, depends on being connected to these feelings. If you’re afraid of strong emotions or if you insist on finding solutions that are strictly rational, your ability to face and resolve differences will be limited.

Emotional awareness—the consciousness of your moment-to-moment emotional experience—and the ability to manage all of your feelings appropriately, is the basis of a communication process that can resolve conflict.

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Pick your battles. Conflicts can be draining, so it’s important to consider whether the issue is really worth your time and energy. Maybe you don’t want to surrender a parking space if you’ve been circling for 15 minutes, but if there are dozens of empty spots, arguing over a single space isn’t worth it.

BetterHelp is an online therapy service that matches you to licensed, accredited therapists who can help with depression, anxiety, relationships, and more. Take the assessment and get matched with a therapist in as little as 48 hours.

Emotional awareness is the key to understanding yourself and others. If you don’t know how or why you feel a certain way, you won’t be able to communicate effectively or resolve disagreements.

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Listen for what is felt as well as said. When you really listen, you connect more deeply to your own needs and emotions, and to those of other people. Active listening also strengthens, informs, and makes it easier for others to hear you when it’s your turn to speak.

Foot on the brake. A withdrawn or depressed stress response. You shut down, space out, and show very little energy or emotion.

The needs of each party play an important role in the long-term success of a relationship. Each deserves respect and consideration. In personal relationships, a lack of understanding about differing needs can result in distance, arguments, and break-ups. In the workplace, differing needs can result in broken deals, decreased profits, and lost jobs.

Psychologist Connie Lillas uses a driving analogy to describe the three most common ways people respond when they’re overwhelmed by stress:

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Foot on both gas and brake. A tense and frozen stress response. You “freeze” under pressure and can’t do anything. You look paralyzed, but under the surface you’re extremely agitated.

Conflict triggers strong emotions and can lead to hurt feelings, disappointment, and discomfort. When handled in an unhealthy manner, it can cause irreparable rifts, resentments, and break-ups. But when conflict is resolved in a healthy way, it increases your understanding of the other person, builds trust, and strengthens your relationships.

(1) Energy pump. A 1400 V high voltage, DC power supply maintains a glow discharge or plasma in a glass tube containing an optimal mixture (typically 5:1 to 7:1) of helium and neon gas, as shown in Fig. 1 and indicated in the diagram of Fig. 2. The discharge current is limited to about 5 mA by a 91 kW ballast resistor. Energetic electrons accelerating from the cathode to the anode collide with He and Ne atoms in the laser tube, producing a large number of neutral He and Ne atoms in excited states. He and Ne atoms in excited states can deexcite and return to their ground states by spontaneously emitting light. This light makes up the bright pink-red glow of the plasma that is seen even in the absence of laser action. The process of producing He and Ne in specific excited states is known as pumping and in the HeNe laser this pumping process occurs through electron-atom collisions in a discharge. In other types of lasers, pumping is achieved by light from a bright flashlamp or by chemical reactions. Common to all lasers is the need for some process to prepare an ensemble of atoms, ions or molecules in appropriate excited states so that a desired type of light emission can occur. (2) Optical gain medium. To achieve laser action it is necessary to have a large number of atoms in excited states and to establish what is termed a population inversion. To understand the significance of a population inversion to HeNe laser action, it is useful to consider the processes leading to excitation of He and Ne atoms in the discharge, using the simplified diagram of atomic He and Ne energy levels given in Fig. 3. A description of the rather complex HeNe excitation process can be given in terms of the following four steps. (a) An energetic electron collisionally excites a He atom to the state labeled 21S0 in Fig. 3. A He atom in this excited state is often written He*(21S0), where the asterisk means that the He atom is in an excited state. (b) The excited He*(21S0) atom collides with an unexcited Ne atom and the atoms exchange internal energy, with an unexcited He atom and excited Ne atom, written Ne*(3S2), resulting. This energy exchange process occurs with high probability only because of the accidental near equality of the two excitation energies of the two levels in these atoms. (c) The 3S2 level of Ne is an example of a metastable atomic state, meaning that it is only after a relatively long period of time - on atomic time scales - that the Ne*(3S2) atom deexcites to the 2P4 level by emitting a photon of wavelength 6328 Å. It is this emission of 6328 Å light by Ne atoms that, in the presence of a suitable optical configuration, leads to lasing action. (d) The excited Ne*(2P4) atom rapidly deexcites to its ground state by emitting additional photons or by collisions with the plasma tube walls. Because of the extreme quickness of the deexcitation process, at any moment in the HeNe plasma, there are more Ne atoms in the 3S2 state than there are in the 2P4 state, and a population inversion is said to be established between these two levels. When a population inversion is established between the 3S2 and 2P4 levels of the Ne atoms in the discharge, the discharge can act as an optical gain or amplification medium for light of wavelength 6328 Å. This is because a photon incident on the gas discharge will have a greater probability of being replicated in a 3S2-->2P4 stimulated emission process (discussed below) than of being destroyed in the complementary 2P4-->3S2 absorption process. (3) Optical resonator or cavity. As mentioned in 2(c) above, Ne atoms in the 3S2 metastable state decay spontaneously to the 2P4 level after a relatively long period of time under normal circumstances; however, a novel circumstance arises if, as shown in Fig. 2, a HeNe discharge is placed between two highly reflecting mirrors that form an optical cavity or resonator along the axis of the discharge. When a resonator structure is in place, photons from the Ne* 3S2-->2P4 transition that are emitted along the axis of the cavity can be reflected hundreds of times between the two highly reflecting end mirrors of the cavity. These reflecting photons can interact with other excited Ne*(3S2) atoms and cause them to emit 6328 Å light in a process known as stimulated emission. The new photon produced in stimulated emission has the same wavelength and polarization, and is emitted in the same direction, as the stimulating photon. It is sometimes useful for purposes of analogy to think of the stimulated emission process as a "cloning" process for photons, as depicted in Fig. 4. The stimulated emission process should be contrasted with spontaneous emission processes that, because they are not caused by any preceding event, produce photons that are emitted isotropically, with random polarization, and over a broader range of wavelengths. As stimulated emission processes occur along the axis of the resonator a situation develops in which essentially all 3S2-->2P4 Ne* decays contribute deexcitation photons to the photon stream reflecting between the two mirrors. This photon multiplication (light amplification) process produces a very large number of photons of the same wavelength and polarization that travel back and forth between the two cavity mirrors. To extract a light beam from the resonator, it is only necessary to have one of the two resonator mirrors, usually called the output coupler, have a reflectivity of only 99% so that 1% of the photons incident on it travel out of the resonator to produce an external laser beam. The other mirror, called the high reflector, should be as reflective as possible. The small diameter, narrow bandwidth, and strong polarization of the HeNe laser beam are determined by the properties of the resonator mirrors and other optical components that lie along the axis of the optical resonator. Back

(c) The 3S2 level of Ne is an example of a metastable atomic state, meaning that it is only after a relatively long period of time - on atomic time scales - that the Ne*(3S2) atom deexcites to the 2P4 level by emitting a photon of wavelength 6328 Å. It is this emission of 6328 Å light by Ne atoms that, in the presence of a suitable optical configuration, leads to lasing action. (d) The excited Ne*(2P4) atom rapidly deexcites to its ground state by emitting additional photons or by collisions with the plasma tube walls. Because of the extreme quickness of the deexcitation process, at any moment in the HeNe plasma, there are more Ne atoms in the 3S2 state than there are in the 2P4 state, and a population inversion is said to be established between these two levels. When a population inversion is established between the 3S2 and 2P4 levels of the Ne atoms in the discharge, the discharge can act as an optical gain or amplification medium for light of wavelength 6328 Å. This is because a photon incident on the gas discharge will have a greater probability of being replicated in a 3S2-->2P4 stimulated emission process (discussed below) than of being destroyed in the complementary 2P4-->3S2 absorption process. (3) Optical resonator or cavity. As mentioned in 2(c) above, Ne atoms in the 3S2 metastable state decay spontaneously to the 2P4 level after a relatively long period of time under normal circumstances; however, a novel circumstance arises if, as shown in Fig. 2, a HeNe discharge is placed between two highly reflecting mirrors that form an optical cavity or resonator along the axis of the discharge. When a resonator structure is in place, photons from the Ne* 3S2-->2P4 transition that are emitted along the axis of the cavity can be reflected hundreds of times between the two highly reflecting end mirrors of the cavity. These reflecting photons can interact with other excited Ne*(3S2) atoms and cause them to emit 6328 Å light in a process known as stimulated emission. The new photon produced in stimulated emission has the same wavelength and polarization, and is emitted in the same direction, as the stimulating photon. It is sometimes useful for purposes of analogy to think of the stimulated emission process as a "cloning" process for photons, as depicted in Fig. 4. The stimulated emission process should be contrasted with spontaneous emission processes that, because they are not caused by any preceding event, produce photons that are emitted isotropically, with random polarization, and over a broader range of wavelengths. As stimulated emission processes occur along the axis of the resonator a situation develops in which essentially all 3S2-->2P4 Ne* decays contribute deexcitation photons to the photon stream reflecting between the two mirrors. This photon multiplication (light amplification) process produces a very large number of photons of the same wavelength and polarization that travel back and forth between the two cavity mirrors. To extract a light beam from the resonator, it is only necessary to have one of the two resonator mirrors, usually called the output coupler, have a reflectivity of only 99% so that 1% of the photons incident on it travel out of the resonator to produce an external laser beam. The other mirror, called the high reflector, should be as reflective as possible. The small diameter, narrow bandwidth, and strong polarization of the HeNe laser beam are determined by the properties of the resonator mirrors and other optical components that lie along the axis of the optical resonator. Back

You can avoid many confrontations and resolve arguments and disagreements by communicating in a humorous way. Humor can help you say things that might otherwise be difficult to express without offending someone. However, it’s important that you laugh with the other person, not at them. When humor and play are used to reduce tension and anger, reframe problems, and put the situation into perspective, the conflict can actually become an opportunity for greater connection and intimacy.

As mentioned in 2(c) above, Ne atoms in the 3S2 metastable state decay spontaneously to the 2P4 level after a relatively long period of time under normal circumstances; however, a novel circumstance arises if, as shown in Fig. 2, a HeNe discharge is placed between two highly reflecting mirrors that form an optical cavity or resonator along the axis of the discharge. When a resonator structure is in place, photons from the Ne* 3S2-->2P4 transition that are emitted along the axis of the cavity can be reflected hundreds of times between the two highly reflecting end mirrors of the cavity. These reflecting photons can interact with other excited Ne*(3S2) atoms and cause them to emit 6328 Å light in a process known as stimulated emission. The new photon produced in stimulated emission has the same wavelength and polarization, and is emitted in the same direction, as the stimulating photon. It is sometimes useful for purposes of analogy to think of the stimulated emission process as a "cloning" process for photons, as depicted in Fig. 4. The stimulated emission process should be contrasted with spontaneous emission processes that, because they are not caused by any preceding event, produce photons that are emitted isotropically, with random polarization, and over a broader range of wavelengths. As stimulated emission processes occur along the axis of the resonator a situation develops in which essentially all 3S2-->2P4 Ne* decays contribute deexcitation photons to the photon stream reflecting between the two mirrors. This photon multiplication (light amplification) process produces a very large number of photons of the same wavelength and polarization that travel back and forth between the two cavity mirrors. To extract a light beam from the resonator, it is only necessary to have one of the two resonator mirrors, usually called the output coupler, have a reflectivity of only 99% so that 1% of the photons incident on it travel out of the resonator to produce an external laser beam. The other mirror, called the high reflector, should be as reflective as possible. The small diameter, narrow bandwidth, and strong polarization of the HeNe laser beam are determined by the properties of the resonator mirrors and other optical components that lie along the axis of the optical resonator. Back

There are three principal elements of a laser, which are (1) an energy pump, (2) an optical gain medium, and (3) an optical resonator. These three elements are described in detail below for the case of the HeNe laser . (1) Energy pump. A 1400 V high voltage, DC power supply maintains a glow discharge or plasma in a glass tube containing an optimal mixture (typically 5:1 to 7:1) of helium and neon gas, as shown in Fig. 1 and indicated in the diagram of Fig. 2. The discharge current is limited to about 5 mA by a 91 kW ballast resistor. Energetic electrons accelerating from the cathode to the anode collide with He and Ne atoms in the laser tube, producing a large number of neutral He and Ne atoms in excited states. He and Ne atoms in excited states can deexcite and return to their ground states by spontaneously emitting light. This light makes up the bright pink-red glow of the plasma that is seen even in the absence of laser action. The process of producing He and Ne in specific excited states is known as pumping and in the HeNe laser this pumping process occurs through electron-atom collisions in a discharge. In other types of lasers, pumping is achieved by light from a bright flashlamp or by chemical reactions. Common to all lasers is the need for some process to prepare an ensemble of atoms, ions or molecules in appropriate excited states so that a desired type of light emission can occur. (2) Optical gain medium. To achieve laser action it is necessary to have a large number of atoms in excited states and to establish what is termed a population inversion. To understand the significance of a population inversion to HeNe laser action, it is useful to consider the processes leading to excitation of He and Ne atoms in the discharge, using the simplified diagram of atomic He and Ne energy levels given in Fig. 3. A description of the rather complex HeNe excitation process can be given in terms of the following four steps. (a) An energetic electron collisionally excites a He atom to the state labeled 21S0 in Fig. 3. A He atom in this excited state is often written He*(21S0), where the asterisk means that the He atom is in an excited state. (b) The excited He*(21S0) atom collides with an unexcited Ne atom and the atoms exchange internal energy, with an unexcited He atom and excited Ne atom, written Ne*(3S2), resulting. This energy exchange process occurs with high probability only because of the accidental near equality of the two excitation energies of the two levels in these atoms. (c) The 3S2 level of Ne is an example of a metastable atomic state, meaning that it is only after a relatively long period of time - on atomic time scales - that the Ne*(3S2) atom deexcites to the 2P4 level by emitting a photon of wavelength 6328 Å. It is this emission of 6328 Å light by Ne atoms that, in the presence of a suitable optical configuration, leads to lasing action. (d) The excited Ne*(2P4) atom rapidly deexcites to its ground state by emitting additional photons or by collisions with the plasma tube walls. Because of the extreme quickness of the deexcitation process, at any moment in the HeNe plasma, there are more Ne atoms in the 3S2 state than there are in the 2P4 state, and a population inversion is said to be established between these two levels. When a population inversion is established between the 3S2 and 2P4 levels of the Ne atoms in the discharge, the discharge can act as an optical gain or amplification medium for light of wavelength 6328 Å. This is because a photon incident on the gas discharge will have a greater probability of being replicated in a 3S2-->2P4 stimulated emission process (discussed below) than of being destroyed in the complementary 2P4-->3S2 absorption process. (3) Optical resonator or cavity. As mentioned in 2(c) above, Ne atoms in the 3S2 metastable state decay spontaneously to the 2P4 level after a relatively long period of time under normal circumstances; however, a novel circumstance arises if, as shown in Fig. 2, a HeNe discharge is placed between two highly reflecting mirrors that form an optical cavity or resonator along the axis of the discharge. When a resonator structure is in place, photons from the Ne* 3S2-->2P4 transition that are emitted along the axis of the cavity can be reflected hundreds of times between the two highly reflecting end mirrors of the cavity. These reflecting photons can interact with other excited Ne*(3S2) atoms and cause them to emit 6328 Å light in a process known as stimulated emission. The new photon produced in stimulated emission has the same wavelength and polarization, and is emitted in the same direction, as the stimulating photon. It is sometimes useful for purposes of analogy to think of the stimulated emission process as a "cloning" process for photons, as depicted in Fig. 4. The stimulated emission process should be contrasted with spontaneous emission processes that, because they are not caused by any preceding event, produce photons that are emitted isotropically, with random polarization, and over a broader range of wavelengths. As stimulated emission processes occur along the axis of the resonator a situation develops in which essentially all 3S2-->2P4 Ne* decays contribute deexcitation photons to the photon stream reflecting between the two mirrors. This photon multiplication (light amplification) process produces a very large number of photons of the same wavelength and polarization that travel back and forth between the two cavity mirrors. To extract a light beam from the resonator, it is only necessary to have one of the two resonator mirrors, usually called the output coupler, have a reflectivity of only 99% so that 1% of the photons incident on it travel out of the resonator to produce an external laser beam. The other mirror, called the high reflector, should be as reflective as possible. The small diameter, narrow bandwidth, and strong polarization of the HeNe laser beam are determined by the properties of the resonator mirrors and other optical components that lie along the axis of the optical resonator. Back

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Be willing to forgive. Resolving conflict is impossible if you’re unwilling or unable to forgive others. Resolution lies in releasing the urge to punish, which can serve only to deplete and drain your life.

The following quiz helps you assess your level of emotional awareness. Answer the following questions with: almost never, occasionally, often, very often, or almost always. There are no right or wrong responses, only the opportunity to become better acquainted with your emotional responses.

When a population inversion is established between the 3S2 and 2P4 levels of the Ne atoms in the discharge, the discharge can act as an optical gain or amplification medium for light of wavelength 6328 Å. This is because a photon incident on the gas discharge will have a greater probability of being replicated in a 3S2-->2P4 stimulated emission process (discussed below) than of being destroyed in the complementary 2P4-->3S2 absorption process. (3) Optical resonator or cavity. As mentioned in 2(c) above, Ne atoms in the 3S2 metastable state decay spontaneously to the 2P4 level after a relatively long period of time under normal circumstances; however, a novel circumstance arises if, as shown in Fig. 2, a HeNe discharge is placed between two highly reflecting mirrors that form an optical cavity or resonator along the axis of the discharge. When a resonator structure is in place, photons from the Ne* 3S2-->2P4 transition that are emitted along the axis of the cavity can be reflected hundreds of times between the two highly reflecting end mirrors of the cavity. These reflecting photons can interact with other excited Ne*(3S2) atoms and cause them to emit 6328 Å light in a process known as stimulated emission. The new photon produced in stimulated emission has the same wavelength and polarization, and is emitted in the same direction, as the stimulating photon. It is sometimes useful for purposes of analogy to think of the stimulated emission process as a "cloning" process for photons, as depicted in Fig. 4. The stimulated emission process should be contrasted with spontaneous emission processes that, because they are not caused by any preceding event, produce photons that are emitted isotropically, with random polarization, and over a broader range of wavelengths. As stimulated emission processes occur along the axis of the resonator a situation develops in which essentially all 3S2-->2P4 Ne* decays contribute deexcitation photons to the photon stream reflecting between the two mirrors. This photon multiplication (light amplification) process produces a very large number of photons of the same wavelength and polarization that travel back and forth between the two cavity mirrors. To extract a light beam from the resonator, it is only necessary to have one of the two resonator mirrors, usually called the output coupler, have a reflectivity of only 99% so that 1% of the photons incident on it travel out of the resonator to produce an external laser beam. The other mirror, called the high reflector, should be as reflective as possible. The small diameter, narrow bandwidth, and strong polarization of the HeNe laser beam are determined by the properties of the resonator mirrors and other optical components that lie along the axis of the optical resonator. Back

Ne lasercost

Whatever the cause of disagreements and disputes at home or work, these skills can help you resolve conflict in a constructive way and keep your relationships strong and growing.

Helium neonlaser ne laser

Foot on the gas. An angry or agitated stress response. You’re heated, keyed up, overly emotional, and unable to sit still.

(a) An energetic electron collisionally excites a He atom to the state labeled 21S0 in Fig. 3. A He atom in this excited state is often written He*(21S0), where the asterisk means that the He atom is in an excited state. (b) The excited He*(21S0) atom collides with an unexcited Ne atom and the atoms exchange internal energy, with an unexcited He atom and excited Ne atom, written Ne*(3S2), resulting. This energy exchange process occurs with high probability only because of the accidental near equality of the two excitation energies of the two levels in these atoms. (c) The 3S2 level of Ne is an example of a metastable atomic state, meaning that it is only after a relatively long period of time - on atomic time scales - that the Ne*(3S2) atom deexcites to the 2P4 level by emitting a photon of wavelength 6328 Å. It is this emission of 6328 Å light by Ne atoms that, in the presence of a suitable optical configuration, leads to lasing action. (d) The excited Ne*(2P4) atom rapidly deexcites to its ground state by emitting additional photons or by collisions with the plasma tube walls. Because of the extreme quickness of the deexcitation process, at any moment in the HeNe plasma, there are more Ne atoms in the 3S2 state than there are in the 2P4 state, and a population inversion is said to be established between these two levels. When a population inversion is established between the 3S2 and 2P4 levels of the Ne atoms in the discharge, the discharge can act as an optical gain or amplification medium for light of wavelength 6328 Å. This is because a photon incident on the gas discharge will have a greater probability of being replicated in a 3S2-->2P4 stimulated emission process (discussed below) than of being destroyed in the complementary 2P4-->3S2 absorption process. (3) Optical resonator or cavity. As mentioned in 2(c) above, Ne atoms in the 3S2 metastable state decay spontaneously to the 2P4 level after a relatively long period of time under normal circumstances; however, a novel circumstance arises if, as shown in Fig. 2, a HeNe discharge is placed between two highly reflecting mirrors that form an optical cavity or resonator along the axis of the discharge. When a resonator structure is in place, photons from the Ne* 3S2-->2P4 transition that are emitted along the axis of the cavity can be reflected hundreds of times between the two highly reflecting end mirrors of the cavity. These reflecting photons can interact with other excited Ne*(3S2) atoms and cause them to emit 6328 Å light in a process known as stimulated emission. The new photon produced in stimulated emission has the same wavelength and polarization, and is emitted in the same direction, as the stimulating photon. It is sometimes useful for purposes of analogy to think of the stimulated emission process as a "cloning" process for photons, as depicted in Fig. 4. The stimulated emission process should be contrasted with spontaneous emission processes that, because they are not caused by any preceding event, produce photons that are emitted isotropically, with random polarization, and over a broader range of wavelengths. As stimulated emission processes occur along the axis of the resonator a situation develops in which essentially all 3S2-->2P4 Ne* decays contribute deexcitation photons to the photon stream reflecting between the two mirrors. This photon multiplication (light amplification) process produces a very large number of photons of the same wavelength and polarization that travel back and forth between the two cavity mirrors. To extract a light beam from the resonator, it is only necessary to have one of the two resonator mirrors, usually called the output coupler, have a reflectivity of only 99% so that 1% of the photons incident on it travel out of the resonator to produce an external laser beam. The other mirror, called the high reflector, should be as reflective as possible. The small diameter, narrow bandwidth, and strong polarization of the HeNe laser beam are determined by the properties of the resonator mirrors and other optical components that lie along the axis of the optical resonator. Back

Conflict arises from differences, both large and small. It occurs whenever people disagree over their values, motivations, perceptions, ideas, or desires. Sometimes these differences appear trivial, but when a conflict triggers strong feelings, a deep personal need is often at the core of the problem. These needs can range from the need to feel safe and secure or respected and valued, to the need for greater closeness and intimacy.

Conflict is a normal part of any healthy relationship. After all, two people can’t be expected to agree on everything, all the time. The key is not to fear or try to avoid conflict but to learn how to resolve it in a healthy way.

You may be so used to feeling stressed that you’re not even aware you are stressed. Stress may pose a problem in your life if you identify with the following:

There are three principal elements of a laser, which are (1) an energy pump, (2) an optical gain medium, and (3) an optical resonator. These three elements are described in detail below for the case of the HeNe laser .

If you’re afraid of conflict, it can become a self-fulfilling prophecy. When you enter a conflict situation already feeling threatened, it’s tough to deal with the problem at hand in a healthy way. Instead, you’re more likely to either shut down or blow up in anger.

As stimulated emission processes occur along the axis of the resonator a situation develops in which essentially all 3S2-->2P4 Ne* decays contribute deexcitation photons to the photon stream reflecting between the two mirrors. This photon multiplication (light amplification) process produces a very large number of photons of the same wavelength and polarization that travel back and forth between the two cavity mirrors. To extract a light beam from the resonator, it is only necessary to have one of the two resonator mirrors, usually called the output coupler, have a reflectivity of only 99% so that 1% of the photons incident on it travel out of the resonator to produce an external laser beam. The other mirror, called the high reflector, should be as reflective as possible. The small diameter, narrow bandwidth, and strong polarization of the HeNe laser beam are determined by the properties of the resonator mirrors and other optical components that lie along the axis of the optical resonator. Back

One of the most reliable ways to rapidly reduce stress is by engaging one or more of your senses—sight, sound, taste, smell, touch—or through movement. You could squeeze a stress ball, smell a relaxing scent, taste a soothing cup of tea, or look at a treasured photograph. We all tend to respond differently to sensory input, often depending on how we respond to stress, so take some time to find things that are soothing to you. Read: Quick Stress Relief.

The process of producing He and Ne in specific excited states is known as pumping and in the HeNe laser this pumping process occurs through electron-atom collisions in a discharge. In other types of lasers, pumping is achieved by light from a bright flashlamp or by chemical reactions. Common to all lasers is the need for some process to prepare an ensemble of atoms, ions or molecules in appropriate excited states so that a desired type of light emission can occur. (2) Optical gain medium. To achieve laser action it is necessary to have a large number of atoms in excited states and to establish what is termed a population inversion. To understand the significance of a population inversion to HeNe laser action, it is useful to consider the processes leading to excitation of He and Ne atoms in the discharge, using the simplified diagram of atomic He and Ne energy levels given in Fig. 3. A description of the rather complex HeNe excitation process can be given in terms of the following four steps. (a) An energetic electron collisionally excites a He atom to the state labeled 21S0 in Fig. 3. A He atom in this excited state is often written He*(21S0), where the asterisk means that the He atom is in an excited state. (b) The excited He*(21S0) atom collides with an unexcited Ne atom and the atoms exchange internal energy, with an unexcited He atom and excited Ne atom, written Ne*(3S2), resulting. This energy exchange process occurs with high probability only because of the accidental near equality of the two excitation energies of the two levels in these atoms. (c) The 3S2 level of Ne is an example of a metastable atomic state, meaning that it is only after a relatively long period of time - on atomic time scales - that the Ne*(3S2) atom deexcites to the 2P4 level by emitting a photon of wavelength 6328 Å. It is this emission of 6328 Å light by Ne atoms that, in the presence of a suitable optical configuration, leads to lasing action. (d) The excited Ne*(2P4) atom rapidly deexcites to its ground state by emitting additional photons or by collisions with the plasma tube walls. Because of the extreme quickness of the deexcitation process, at any moment in the HeNe plasma, there are more Ne atoms in the 3S2 state than there are in the 2P4 state, and a population inversion is said to be established between these two levels. When a population inversion is established between the 3S2 and 2P4 levels of the Ne atoms in the discharge, the discharge can act as an optical gain or amplification medium for light of wavelength 6328 Å. This is because a photon incident on the gas discharge will have a greater probability of being replicated in a 3S2-->2P4 stimulated emission process (discussed below) than of being destroyed in the complementary 2P4-->3S2 absorption process. (3) Optical resonator or cavity. As mentioned in 2(c) above, Ne atoms in the 3S2 metastable state decay spontaneously to the 2P4 level after a relatively long period of time under normal circumstances; however, a novel circumstance arises if, as shown in Fig. 2, a HeNe discharge is placed between two highly reflecting mirrors that form an optical cavity or resonator along the axis of the discharge. When a resonator structure is in place, photons from the Ne* 3S2-->2P4 transition that are emitted along the axis of the cavity can be reflected hundreds of times between the two highly reflecting end mirrors of the cavity. These reflecting photons can interact with other excited Ne*(3S2) atoms and cause them to emit 6328 Å light in a process known as stimulated emission. The new photon produced in stimulated emission has the same wavelength and polarization, and is emitted in the same direction, as the stimulating photon. It is sometimes useful for purposes of analogy to think of the stimulated emission process as a "cloning" process for photons, as depicted in Fig. 4. The stimulated emission process should be contrasted with spontaneous emission processes that, because they are not caused by any preceding event, produce photons that are emitted isotropically, with random polarization, and over a broader range of wavelengths. As stimulated emission processes occur along the axis of the resonator a situation develops in which essentially all 3S2-->2P4 Ne* decays contribute deexcitation photons to the photon stream reflecting between the two mirrors. This photon multiplication (light amplification) process produces a very large number of photons of the same wavelength and polarization that travel back and forth between the two cavity mirrors. To extract a light beam from the resonator, it is only necessary to have one of the two resonator mirrors, usually called the output coupler, have a reflectivity of only 99% so that 1% of the photons incident on it travel out of the resonator to produce an external laser beam. The other mirror, called the high reflector, should be as reflective as possible. The small diameter, narrow bandwidth, and strong polarization of the HeNe laser beam are determined by the properties of the resonator mirrors and other optical components that lie along the axis of the optical resonator. Back

You can ensure that the process of managing and resolving conflict is as positive as possible by sticking to the following guidelines:

When people are in the middle of a conflict, the words they use rarely convey the issues at the heart of the problem. But by paying close attention to the other person’s nonverbal signals or “body language,” such as facial expressions, posture, gestures, and tone of voice, you can better understand what the person is really saying. This will allow you to respond in a way that builds trust, and gets to the root of the problem.

(d) The excited Ne*(2P4) atom rapidly deexcites to its ground state by emitting additional photons or by collisions with the plasma tube walls. Because of the extreme quickness of the deexcitation process, at any moment in the HeNe plasma, there are more Ne atoms in the 3S2 state than there are in the 2P4 state, and a population inversion is said to be established between these two levels. When a population inversion is established between the 3S2 and 2P4 levels of the Ne atoms in the discharge, the discharge can act as an optical gain or amplification medium for light of wavelength 6328 Å. This is because a photon incident on the gas discharge will have a greater probability of being replicated in a 3S2-->2P4 stimulated emission process (discussed below) than of being destroyed in the complementary 2P4-->3S2 absorption process. (3) Optical resonator or cavity. As mentioned in 2(c) above, Ne atoms in the 3S2 metastable state decay spontaneously to the 2P4 level after a relatively long period of time under normal circumstances; however, a novel circumstance arises if, as shown in Fig. 2, a HeNe discharge is placed between two highly reflecting mirrors that form an optical cavity or resonator along the axis of the discharge. When a resonator structure is in place, photons from the Ne* 3S2-->2P4 transition that are emitted along the axis of the cavity can be reflected hundreds of times between the two highly reflecting end mirrors of the cavity. These reflecting photons can interact with other excited Ne*(3S2) atoms and cause them to emit 6328 Å light in a process known as stimulated emission. The new photon produced in stimulated emission has the same wavelength and polarization, and is emitted in the same direction, as the stimulating photon. It is sometimes useful for purposes of analogy to think of the stimulated emission process as a "cloning" process for photons, as depicted in Fig. 4. The stimulated emission process should be contrasted with spontaneous emission processes that, because they are not caused by any preceding event, produce photons that are emitted isotropically, with random polarization, and over a broader range of wavelengths. As stimulated emission processes occur along the axis of the resonator a situation develops in which essentially all 3S2-->2P4 Ne* decays contribute deexcitation photons to the photon stream reflecting between the two mirrors. This photon multiplication (light amplification) process produces a very large number of photons of the same wavelength and polarization that travel back and forth between the two cavity mirrors. To extract a light beam from the resonator, it is only necessary to have one of the two resonator mirrors, usually called the output coupler, have a reflectivity of only 99% so that 1% of the photons incident on it travel out of the resonator to produce an external laser beam. The other mirror, called the high reflector, should be as reflective as possible. The small diameter, narrow bandwidth, and strong polarization of the HeNe laser beam are determined by the properties of the resonator mirrors and other optical components that lie along the axis of the optical resonator. Back

Know when to let something go. If you can’t come to an agreement, agree to disagree. It takes two people to keep an argument going. If a conflict is going nowhere, you can choose to disengage and move on.