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30 mm Cage System Beam Traps


  • Beam Traps for CW or Pulsed Lasers
  • Solutions for up to 80 W
  • Essential Component for Laser Lab Safety

BTC30

BT600

BTC30

in 30 mm
Cage System

Related Items


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Item #Laser InputWavelength RangeMax Average Power
BTC30 CW 200 nm - 3 µm 5 W
BT600(/M) CW 200 nm - 3 µm 80 W
BT610(/M) CW & Pulsed 400 nm - 2.5 µm 30 W
BT620(/M) CW & Pulsed 1 - 12 µm 50 W

Features

  • Laser Safety Devices Reduce Risk of Laser Damage
  • Solutions for up to 80 W or 40 J/cm2 (10 Hz) Beams
  • 30 mm Cage Compatible
  • Post-Mountable or Quick-Release-Cage-Mount Options Available

Thorlabs' selection of 30 mm cage-compatible beam traps 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.

We also offer a post-mounted beam block with a large absorption target area.


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Quick-Release Beam Trap for 30 mm Cage System

BTC30 mounted in 30 mm Cage
Click to Enlarge
A BTC30 Beam Trap mounted onto a
30 mm Cage system.
  • Scatters and Absorbs Laser Beam Energy
  • 30 mm Cage System Compatible
  • Quick-Release Flexure Clamping Mechanism for Secure Cage Mounting without Disassembly
  • Ø8 mm Clear Aperture

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 below, 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.

Item #Wavelength RangeAbsorptive MaterialLaser TypeMax Average
Power
Max Average
Power Density
Max Energy
Density
BackscatteraEntrance Aperture
BTC30 200 nm - 3 µm Anodized
Aluminum
CW 5 Wb 150 W/cm2 c 30 mJ/cm2 b 5 x 10-3 @633 nm Ø0.315"
(Ø8 mm)
  • Total integrated backscatter as a fraction of entrance beam power.
  • Housing temperature will exceed 40 °C above 2 W input power.
  • Performance of individual units may differ due to material variability.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
BTC30 Support Documentation
BTC30Customer Inspired! 30 mm Cage-Compatible, Quick-Release Beam Trap, 5 W Max Avg. Power, CW Only
$219.67
Today

Beam Traps for 30 mm Cage System

BT600 with SM05 Lens Tube
Click to Enlarge

Beam Trap Mounted on a Ø1/2" Post with a Ø1/2" Lens Tube Connected to the Input

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.

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.

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.

Item # Wavelength
Range
Absorptive
Material
Laser Type Max Average
Power
Max Average
Power Densitya
Max Energy
Density
Backscatterb Entrance
Aperture
Max Acceptance
Anglec
BT600(/M) 200 nm - 3 µm Anodized Aluminum CW 80 Wd 150 W/cm2 30 mJ/cm2 2 x 10-4 @ 633 nm Ø0.43"
(Ø11 mm)
±5°
BT610(/M) 400 nm - 2.5 µm Absorptive Neutral
Density Glass
CW and Pulsed 30 W 15 W/cm2 40 J/cm2 f 9 x 10-5 @ 633 nm
BT620(/M) 1 - 12 µm Graphite CW and Pulsed 50 We 25 kW/cm2 25 J/cm2 f 1 x 10-4 @ 633 nm
1 x 10-4 @ 3.39 µm
  • Performance of individual units may differ due to material variability.
  • Total integrated backscatter as a fraction of entrance beam power.
  • In order to ensure optimum performance, measured from the optical axis in any direction.
  • Housing temperature will exceed 100 °C above 40 W input power.
  • Housing temperature will exceed 100 °C above 35 W input power.
  • At 1064 nm, 10 ns, 10 Hz. Performance of individual units may differ due to material variability.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
BT600 Support Documentation
BT600Beam Trap, 200 nm - 3 µm, 80 W Max Avg. Power, CW Only, 8-32 Tap
$254.30
Today
BT610 Support Documentation
BT610Beam Trap, 400 nm - 2.5 µm, 30 W Max Avg. Power, Pulsed and CW, 8-32 Tap
$320.31
Today
BT620 Support Documentation
BT620Beam Trap, 1 - 12 µm, 50 W Max Avg. Power, Pulsed and CW, 8-32 Tap
$320.31
Today
+1 Qty Docs Part Number - Metric Price Available
BT600/M Support Documentation
BT600/MBeam Trap, 200 nm - 3 µm, 80 W Max Avg. Power, CW Only, M4 Tap
$254.30
Today
BT610/M Support Documentation
BT610/MBeam Trap, 400 nm - 2.5 µm, 30 W Max Avg. Power, Pulsed and CW, M4 Tap
$320.31
Today
BT620/M Support Documentation
BT620/MBeam Trap, 1 - 12 µm, 50 W Max Avg. Power, Pulsed and CW, M4 Tap
$320.31
Today
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