Gentec-EO Accessories for Beam Diagnostics - Manual (Page 11)

Accessories for Beam Diagnostics Revision 1.2 11
3. BEAM SPLITTERS
3.1. BDA-S-10-UV/IR – BEAM SPLITTER CUBE
The BDA-S-10-UV/IR beam splitter cube provides fixed attenuation and beam sampling for performing
diagnostics on high power laser sources. It uses the front surface reflection of an uncoated laser mirror to achieve
a reflection of 3% to 10% of the input laser beam. There is no back reflection and the image of the beam is
virtually undistorted.
The surface is polished to 10-5 scratch-dig and 1/10 wave finish, wedged at 30 arcmin to avoid unwanted
interference fringes. It can take power densities up to 2 GW/cm². Like the BDA-A-VAR variable attenuator, it is C-
mount threaded. It can be connected directly to the BDA-A-VAR variable attenuator or the Beamage-3.0 with
compatible connecting tubes and can be mounted onto a post via its M6 holes.
Figure 6: BDA-S-10-UV/IR – Beam Splitter Cube
Table 6: Beam Splitter Cube Specifications
BDA-S-10-UV/IR
Reflection 3% to 10% (polarization dependent)
Spectral Range 190 nm – 2200 nm
Clear Aperture 19 mm
Damage Threshold (Power) 2 GW/cm
2
Damage Threshold (Energy) 50 J/cm
2
Wedge 30 arcmin
Surface Flatness λ/10
Surface Quality 10-5 Scratch-Dig
Part Number 202604