High Power Polarizing Cube Beamsplitter
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High Power Polarizing Cube Beamsplitters were specifically developed for use in high power pulsed and CW laser applications. They are formed from two right angle, 45° prisms optically contacted together. The hypotenuse is coated with an all dielectric, polarization sensitive coating designed to separate an incident, unpolarized, monochromatic beam into its S and P polarization components. The extinction ratio (Tp/Ts) exceeds 200:1 in the transmitted beam. The two orthogonally polarized beams emerge from the cube at 90° with respect to each other. All entrance and exit surfaces are coated with a high efficiency, narrowband, anti-reflection coating.
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RMI Standard Specifications
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Angle incidence:
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0º |
| Angle of Reflectance: |
90º |
| Material: |
BK7, FS, UVFS, CaF2, ZnSe, Si, All Glass, All Crystals |
Surface Figure:
BK7, UVFS, FS:
CaF2:
ZnSe, Si:
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All polished surfaces:
λ/20 at 633 nm
λ/4 at 633 nm
λ/40 at 10.6 µm |
| Transmitted Wavefront: |
λ/4 at 633nm |
Surface Quality:
BK7, UVFS, FS:
CaF2: |
All polished surfaces:
10-5
20-10 |
| Dimensional Tolerance: |
± 0.010" |
Transmitted Beam Deviation:
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< 3 minutes
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| Reflected Beam Deviation: |
< 6 minutes |
| Bevels: |
0.010" – 0.030" at 45º |
| Clear Aperture: |
Exceeds central 85% of edge dimension |
Reflectance:
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Rs ≥ 99.5% |
Transmittance:
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Tp ≥ 95% |
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Extinction Ratio:
248-355 nm
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Tp/Ts = 100:1 |
| 532-1064 nm |
Tp/Ts ≥ 200:1 |
| Anti-Reflection Coating: |
R < 0.25% per surface,
all entrance and exit
surfaces |
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