Attach the lens to the female end of your lens adapter by aligning the red dots located at the rear of the lens with the one at the edge of the adapter ring. Screw in your lens until it clicks or is fastened securely and be sure not to over tighten. Then insert the male end of the adapter to the camera body, by aligning the red dots of your adapter ring and camera body and rotating the adapter until you hear a click – usually in a clockwise direction. Be sure to check everything is firmly attached before picking up the camera to start shooting.

A quick internet search of the camera model followed by lens mount is the quickest way to confirm your camera’s lens mount. E.g. If you have a Sony A7r, a quick search shows it has a Sony E-mount.

The achieved crystal lifetime can depend on various factors, including the crystal material type, the material quality, the peak and average intensity levels, details of anti-reflection coatings, other pulse parameters such as the pulse duration, and also contaminants in the ambient air. For example, hydrocarbons from some oils at mechanical parts may be chemically altered by the ultraviolet light and may lead to the deposition of absorbing material on the crystal and on other optics, e.g. a collimation lens.

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For efficient single-pass third-harmonic generation, the nonlinear crystals need to be operated with fairly high optical intensities. For the sum-frequency mixer crystal, this is often a problem: the intense ultraviolet light can lead to gradual degradation of the crystal material and an anti-reflection coating on the exit surface, even for operation well below the threshold for instant laser-induced damage. Under such conditions, nonlinear crystals can become consumables, i.e., system parts with quite limited lifetime, which need to be replaced periodically. As normally only the volume of the beam is affected, one may often somewhat shift the crystal in order to use another region which has not yet been degraded. Such movements may also be done with some automatic crystal shifter; this method is sometimes called indexing of the crystal. Under good conditions, one may reach several hundred hours of operation on one spot of an LBO crystal and use dozens of spots for obtaining an overall lifetime of many thousand hours with a single crystal.

Covesion has SFG crystals held in stock that can be dispatched to promptly meet your application requirements. Our team of industry-leading experts are also on hand to assist in the fulfilment of more specific user requirements using our customer manufacturing capability.

Laser beam frequencyformula

2015327 — The NA of an objective is the simply the ability of the lenses to collect light at a fixed distance from the sample which you are viewing.

Substantial improvements in crystal lifetime for a given output power level are possible by using an enhancement cavity around the third-harmonic crystal, i.e., by doing resonant frequency conversion. This is because the single-pass conversion efficiency can then be lower, as the non-converted light is “recycled”. One may then work without an automatic crystal shifter. However, resonant enhancement is not always possible (e.g., for laser sources with insufficient coherence properties) and introduces additional complications.

Laser frequencyformula

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Attach your lens to the adapter, and then your adapter to your camera body. Put all settings on your lens and camera into manual mode, and select ‘shoot without lens’ in your camera settings.

LASERfull form

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Urth lens mount adapters are made from premium materials and are guaranteed for life. Our consciously designed lens adapters are made for the world’s best cameras and lenses. Our low-impact designs offer professional quality at an affordable price. Our lens mount adapters allow you to use third-party and vintage lenses with your camera. Expand your lens options and explore your creativity with our premium lens mount adapters. Made from hardened magnalium, our lens adapters provide a snug fit and easy mounting so you can quickly and easily change lenses. Each adapter plants 1 tree so future generations can enjoy nature as much as we do now. Read more Read less

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Because you need to use your camera in full manual mode, you may need to familiarise yourself with this before shooting. You’ll soon work out which lenses you enjoy using with your camera. Analogue lenses can provide professional quality glass at a fraction of the cost of modern lenses so lens adapters can help you shoot with better lenses for less.

The product mix includes bare crystals and plug-and-play fibered mixers. A typical reference spec is >30 mW at 355 nm from a fibered mixer requiring only 2.5 W cw pump at 1064 nm. Please contact us for solutions to meet your specific demands.

Theoretically, the total power conversion efficiency of the frequency tripling process could be close to 100 % in a single pass through the crystals. For that, the frequency doubler should have a conversion efficiency of 2/3, so that the second-harmonic wave has twice the power of the remaining fundamental wave, and both have equal photon numbers. In practice, the efficiency of the frequency doubler is normally somewhat lower (often around 40 to 50 %), and in particular the sum frequency mixer is far from 100 % efficient. The latter problem can result from many effects, such as too low optical intensities, design limitations enforced by optical damage, effects of spatial walk-off, mismatch of pulse duration and/or temporal walk-off, etc. Tentatively, the conversion works best for high peak powers in not too short (e.g. picosecond) pulses, and when the beam quality is high and the optical bandwidth not too high. Overall conversion efficiencies from infrared to ultraviolet can then be of the order of 30 to 40%.

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Laser frequencyand wavelength

A lens adapter allows you to attach a different brand of lens to your camera body, letting you use an otherwise incompatible lens with your camera.

If you have an old second hand lens and you are unsure of the camera it was made for, take all the known details of the lens and search the web.

As part of our HarmoniXX product line, the HarmoniXX THG is a frequency converter for tripling the frequency of ultra short-pulse lasers.

The easiest way to find and confirm your lens mount is to know the mount of the camera it was used on originally. A quick internet search of the camera model followed by lens mount is a sure way to confirm what lens mount you need. For example if you have an old Nikon lens and you know it was used on a Nikon FM2, you can easily find that the lens has a Nikon F-mount. This is particularly useful for lenses that are made for different mounts i.e Sigma and Tamron bring out the same lens with different mounts including EF, F, E so knowing the camera the lens was used on is a good shortcut.

Laser beam frequencychart

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Laserwavelength chart

HC Photonics (HCP) offers both commercial off-the-shelf (COTS) and custom PPMgO:LN or PPMgO:LT based frequency tripling devices for input wavelength ranging from 1064 nm to 5000 nm.

Urth lens mount adapters are made from premium materials and are guaranteed for life. Our consciously designed lens adapters are made for the world’s best cameras and lenses. Our low-impact designs offer professional quality at an affordable price. Our lens mount adapters allow you to use third-party and vintage lenses with your ... Read more Read less

We offer the Femtokits – a complete solution for efficient third harmonic generation with femtosecond Ti:sapphire lasers in laboratory settings. There is a wide choice of standard BBO, LBO and DKDP nonlinear crystals for THG in the Nd:YAG LaserLine and FemtoLine product groups.

Using our advertising package, you can display your logo, further below your product description, and these will been seen by many photonics professionals.

Since all our adapters are fully manual, you need to change your camera settings to manual before you start shooting. This is because a lens adapter doesn’t enable electronic communication to pass from the lens to the camera. You need to manually set your exposure and focus. If your lens does not have a manual aperture control ring, it will stop down to its smallest f-stop by default.

With numerical modeling, the whole frequency tripling process can be simulated with fairly high accuracy and reliability of the results.

Laser beam frequencycalculator

Note that higher UV output powers do not necessarily decrease the crystal lifetime, if the mode areas in the crystal are increased in proportion to the power level. The operational intensities are then not higher than in lower-power devices. One may be tempted, however, to use higher powers for applying higher intensities with the goal of further increasing the power conversion efficiency. This can then reduce the crystal lifetime.

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Unlike conventional triplers, the HarmoniXX THG requires less adjustment efforts, because no separation and recombination of the interacting beams is needed. This user-friendly feature has one common optical beam path for all interacting beams. It is implemented by means of a proprietary delay compensator and provides consistent spatial overlap for optimum efficiency.

Frequency tripling is a process of nonlinear frequency conversion where the resulting optical frequency is three times that of the input laser beam. In principle, that can be achieved with a <$\chi^{(3)}$> nonlinearity for direct third-harmonic generation [12, 13, 14], but this is difficult due to the small <$\chi^{(3)}$> nonlinearity of optical media and also because of phase-matching constraints (except for tripling in gases). Therefore, frequency tripling is usually realized as a cascaded process, beginning with frequency doubling of the input beam and subsequent sum frequency generation of both waves, with both processes being based on nonlinear crystal materials with a <$\chi^{(2)}$> nonlinearity.

Laserwavelength range

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We have published a number of comprehensive articles where we explain how a wide range of tools for the marketing of photonics, optics and laser product works.

There are countless creative experiments to be explored by mixing different brands of lenses with your camera body. Lens adapters can also help your existing collection of lenses go further with any new cameras you collect. So you can invest in a new camera and make the most of your favourite lenses.

We offer magnesium-doped PPLN for Sum Frequency Generation (SFG) for cascaded THG from a 1550-nm SHG crystal, or from a fixed 1550-nm laser and a tunable Ti:sapphire (or similar) laser for tunable green generation. Stock MgO:PPLN SFG crystals are available for generation between 500 nm and 660 nm.

The main application of frequency tripling is the generation of ultraviolet light. Most common is the generation of 355-nm light by frequency tripling of a laser beam with 1064 nm, as obtained from a Nd:YAG or Nd:YVO4 laser. A common approach is to use two LBO (lithium triborate) crystals, or an LBO and an BBO crystal, the first being phase-matched for second-harmonic generation and the second for sum frequency generation. It is easy to make this process efficient when using pulses from a Q-switched or mode-locked laser, but also possible in continuous-wave operation e.g. with intracavity frequency doubling and resonant sum frequency generation.

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Shalom EO offers a vast variety of nonlinear crystals for frequency tripling, including BBO, KDP and KD*P, LBO crystals,in addition to PPLN waveguides. Both off-the-shelf and customized products are available.