60 mm Cage System Beam Blocks

LB2

Beam Block

Application Idea

LB2 Beam Block in 60 mm Cage System
Used to Block IR Beam Transmitted
Through Dichroic Beamsplitter

Solutions for up to 500 W (CW) or 25 J/cm² (Pulsed)
Effective Over 1 - 12 μm Wavelength Range
Essential Component for Laser Lab Safety

LB2L

Liquid-Cooled Beam Block

Please Wait

Overview
Feedback

Click to Enlarge
LB2 Beam Block Mounted on a
Ø1/2" Post with a 60 mm Cage System

Click to Enlarge
LB2 Beam Block with
Faceplate Removed

Click for Details
Base of LB2L Beam Block

Click to Enlarge
LB2L Beam Block with Tubing Connectors

Features

Laser Safety Devices Reduce Risk of Laser Damage
IR Beam Blocks Effective Over 1 - 12 µm Wavelength Range
Solutions for up to 500 W (CW) or 25 J/cm² (Pulsed)
60 mm Cage System Compatible
Post-Mountable

Thorlabs' 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.

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).

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.

Please note that the LB2(/M) and LB2L(/M) beam blocks 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 Density	Max Energy Density	Entrance Aperture	Operating Temperature Range	Pressure Rating	Tubing Outer Diameter^a
LB2(/M)	1 - 12 µm	Graphite	CW and Pulsed	80 W^b	25 kW/cm^{2 c}	25 J/cm² ^c,d	1.97" x 1.97" (50.0 mm x 50.0 mm)	N/A	N/A	N/A
LB2L(/M)	1 - 12 µm	Graphite	CW and Pulsed	500 W^e	25 kW/cm²	25 J/cm² ^c,d	1.97" x 1.97" (50.0 mm x 50.0 mm)	0 °C to 150 °C	145 psi	1/4" (6 mm)

Tubing Not Included
Housing temperature will exceed 100 °C above 45 W input power.
Performance of individual units may differ due to material variability.
At 1064 nm, 10 ns, 10 Hz
At a flow rate of 1 L/min at 25 °C water temperature. The max recommended power using the LK220 Thermoelectric Liquid Chiller is 250 W.

Posted Comments:
No Comments Posted