LBS-400 Beam Splitter for Laser Beam Profilers
LBS-400 Beam Splitter for Laser Beam Profilers
The LBS-400 beam sampler attachment for cameras allows you to measure UV or IR wavelength laser beams with diameters up to 1 in. and powers ranging from 10 mW to ~500W(1). The beam sampler is designed so that the preferential polarization selection effect of a single wedge is canceled out and the resulting beam image is polarization corrected to restore the polarization components of the original beam.
(1) For Gaussian beam diameter <1/2 the clear aperture and depending on ND filter and camera saturation limits the maximum power may be as high as 1200W.
- Measure UV, NIR or IR wavelength laser beams
- Diameters up to 1 in. (25.4 mm)
- Powers from 10 mW to ~500 W See All Features
Specifications
| Models |  | | | |
|---|---|---|---|---|
| Spectral Range | 193-355 nm | 1064 nm | 10.6 μm | |
| Material | Wedge: UVFS Filter: Inconel | Wedge: BK7 Filter: Bulk ND | Wedge: ZnSe Filter: CaF2 | |
| Wedge Reflection | AR coated, ≤1.5% | AR coated, ≤1% | AR coated, ≤1% | |
| Reflection | 0.01% | 0.01% | 0.01% | |
| Nominal ND | 0.5, 1.0 in both filters | 0.5, 1.0 in both filters | 0.5, 1.0 in both filters | |
| Damage Threshold | 100 W/cm², 20 mJ/cm² 10 ns pulse | 50 W/cm², 1 J/cm² 10 ns pulse | 5 W/cm², 300 J/cm² 1 ms pulse | |
| Clear Aperture | Ø31.75 mm | Ø31.75 mm | Ø31.75 mm |
Features
LBS-400 Beam Splitters
The beam sampler operates by reflecting the incoming beam from the front surfaces of a pair of wedges through 90 degrees into the camera. Approximately 99% of the beam is transmitted through each beam sampler with 0.01% passed on to the camera. A set of adjustable filters are provided to make final intensity adjustments to the beam before it reaches the camera imager.
Frequently Asked Questions
- What should be my safety concerns while using LBS-400?Answer
Regular laser safety precautions should apply. Please note, that the main incident beam will exit the LBS-400 refracted approximately 6°. Provision must be made to safely contain the transmitted beam by beam dump or power meter.
- How to deal with removable Beam Blocker?Answer
The beam blocker is designated to keep one wedge surface protected during handling and shipping. It can be left attached for low power laser operations. However, in the case of high-power laser irradiation scattered light might interfere with beam profile measurement and cause offset. In case of such offset, we recommend removing the beam blocker.
After removal, an additional laser output, having less than 0.1% of incident beam power will be reflected. That beam could be used for simultaneous measurement of laser power via Ophir Power Meter in addition to beam profiler.
- Can I use LBS-400 both for beam profiling and power measurement?Answer
Yes, the main function of LBS-400 beam splitter is Beam profiling, however, it performs a 3-way beam splitting:
Less than 0.01% (1/103) of the beam is reflected in one direction and less than 1% in another while the remaining 99% of the incident laser beam is transmitted.
This allows user to measure one of the 3 beams, depending on available power measurement equipment and setup convenience.
Resources
Data Sheets
LBS-400 Beam Splitters Datasheet(106 kB, PDF)
Drawings & CAD
LBS-400 Drawing(419.3 kB, PDF)
Technical Notes
LBS-400 User Notes(585.7 kB, PDF) Integrated Solutions
