Ophir Nova II

Beam traps are common laser lab safety devices designed to absorb laser beam energy. The Quick-Release Beam Trap offered here is optimized to accept CW laser beams of up to 5 W. It is equipped with a flexure-style clamp that snaps onto any two adjacent cage rods of a preassembled 30 mm cage system. To snap the beam trap onto the rods, ensure that the two 4-40 setscrews (0.050" hex) located on the sides of the trap are loose enough to allow the flexure mechanism to snap over the cage rods. Once positioned, these same two setscrews can be tightened to lock the beam trap's position along the rods. For small positional adjustments, slightly loosen the locking screws and slide the device along the cage rods.

Unlike the beam traps sold above, this beam trap is not equipped with a tap for direct post mounting. Caution should be taken when using this beam trap with laser beams above 2 W, as it will become hot to the touch.

LaserPower meter

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The LB2(/M) IR Beam Block is recommended for use with average powers that do not exceed 80 W (CW) or energy densities that do not exceed 25 J/cm2 (pulsed; performance of individual units may vary due to material properties). It also offers three 8-32 (M4) taps on one side for mounting to Ø1/2" posts or Ø1" posts. The 1.97" x 1.97" (50.0 mm x 50.0 mm) entrance aperture can be widened to 2.72" x 1.97" (69.0 mm x 50.0 mm) by removing the front faceplate using a 1.5 mm hex key (not included).

Thorlabs' selection of Beam Traps and Beam Blocks are common laser lab safety devices. They are designed to be the terminal piece of an optical system and absorb the incident laser beam. The beam traps that feature both 4-40 taps for integration into a 30 mm cage system and an 8-32 (M4) tap for post mounting are suitable for CW (BT600) or CW and pulsed (BT610 & BT620) beams up to 80 W. The BTC30 quick-release trap is suitable for 5 W CW lasers and can be easily inserted into and removed from existing 30 mm cage systems without disassembly. The LB1(/M) visible and NIR beam block provides a large absorptive target area for pulsed and CW beams up to 10 W. The LB2(/M) and LB2L(/M) IR beam blocks absorb pulsed beams up to 25 J/cm2 and are also compatible with our 60 mm cage systems. The LB2(/M) beam block absorbs CW beams up to 80 W. The LB2L(/M) IR beam block is designed to be liquid cooled, allowing it to handle a maximum average power of 500 W (CW), and has connectors for 1/4" (6 mm) inner diameter tubing.

Coherent power meter

These beam traps have internally SM05-threaded input apertures and are 30 mm cage system compatible. A Ø1/2" Lens Tube can be attached directly to the input aperture to shield the laser beam path (see photo to the right). An 8-32 (M4)-tapped hole on the bottom of the beam traps enables post mounting.

Safe practices and proper usage of safety equipment should be taken into consideration when operating lasers. The eye is susceptible to injury, even from very low levels of laser light. Thorlabs offers a range of laser safety accessories that can be used to reduce the risk of accidents or injuries. Laser emission in the visible and near infrared spectral ranges has the greatest potential for retinal injury, as the cornea and lens are transparent to those wavelengths, and the lens can focus the laser energy onto the retina.

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Gentec power meter

Please note that the BT620(/M) contains graphite and may not be suitable for all lab environments. All beam traps will become hot to the touch with beam powers above 10 W.

Our LB2(/M) and LB2L(/M) Beam Blocks absorb CW and pulsed laser beams over the 1 - 12 µm wavelength range. Each unit features a large 1.97" x 1.97" (50.0 mm x 50.0 mm) entrance aperture with a faceplate serves to protect the graphite pad. These beam blocks have 4-40 taps for integration into our 60 mm cage system.

Beam traps are common laser lab safety devices that are designed to absorb a laser beam's energy. Versions are offered here that can be used with either CW or pulsed laser beams. Simply align so the beam is directed into the entrance aperture.

About 7mm travel. Ø12mm knobs. Precise ball pointed driving screws. 30 and 32mm long. Mount on Ø8 or M10 holes. Low profile and compact.

The LB1(/M) Visible Beam Block absorbs CW or pulsed laser beams over the 400 nm - 2 µm wavelength range. It is recommended for a maximum power of 10 W and is shipped pre-mounted on a 3" (75 mm) long, Ø1/2" post. The post is easily interchangeable with other Ø1/2" posts or Ø1" posts with 8-32 (M4) taps.

Please note that the LB2(/M) and LB2L(/M) beam blocks contains graphite and may not be suitable for all lab environments. All beam blocks will become hot to the touch with high beam powers.

Ophir power meter

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Thorlabs' power meter

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The LB2L(/M) Beam Block is designed to be liquid cooled, allowing it to handle a maximum average power of 500 W (CW) when used with a 1 L/min water supply at 25 °C. Similar to the LB2(/M) beam block, it can also be used with pulsed sources with energy densities up to 25 J/cm2 (performance of individual units may vary due to material properties). This block has fittings for 1/4" (6 mm) outer diameter hoses; for example, our HPU6 polyurethane hose is compatible with the LB2L block. The one-touch fittings allow the user to easily push the tubing into the connector when attaching a water or coolant supply such as our LK220 liquid chiller. When used with this chiller, the recommended maximum average power is 250 W (CW). The block can withstand pressure up to 145 psi and can be used with water, ethanol-based coolants, or glycol-based coolants, such as our CDTX Coolant. Each unit offers twelve 8-32 (M4) taps, three on each side, for mounting to Ø1/2" posts or Ø1" posts.

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Lasers are categorized into different classes according to their ability to cause eye and other damage. The International Electrotechnical Commission (IEC) is a global organization that prepares and publishes international standards for all electrical, electronic, and related technologies. The IEC document 60825-1 outlines the safety of laser products. A description of each class of laser is given below: