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Femtoline Laser Beamsplitters

The Beamsplitter splits average polarized laser beam into two beams separated by 90° from each other.

The standard substrate thickness is 3 mm. If you need thinner substrate, please choose from Precision Thin Round Windows.

 

Substrate
Material
UV Grade Fused Silica
S1 Surface Flatness
λ/10 at 633 nm
S1 Surface Quality
20-10 scratch & dig (MIL-PRF-13830B)
S2 Surface Flatness λ/10 at 633 nm
S2 Surface Quality
20-10 scratch & dig (MIL-PRF-13830B)
Diameter Tolerance
+0.00 mm-0.12 mm
Thickness Tolerance
±0.25
Parallelism 30 arcsec
Chamfer
0.3 mm at 45° typical

 

Coating
Technology Electron beam multilayer dielectric
Adhesion and Durability Per MIL-C-675A. Insoluble in lab solvents
Clear Aperture Exceeds central 85% of diameter
Angle of Incidence
45±3°
Back Side Antireflection Coated
R<0.5%
Laser Damage Threshold
>100 mJ/cm2, 50 fsec pulse, 800 nm typical