Polarizers » Cube Beamsplitters, High Power

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.

RMI Standard Specifications
Materials:	BK7, FS, UVFS, CaF₂
Angle of Incidence:	0º
Angle of Reflectance:	90°
Surface Figure: BK7, FS, UVFS: CaF₂:	All polished surfaces: λ/20 at 633 nm λ/4 at 633 nm
Transmitted Wavefront:	λ/4 at 633nm
Surface Quality: BK7, FS, UVFS: CaF₂:	All polished surfaces: 10-5 20-10
Dimensional Tolerance:	± 0.010"
Transmitted Beam Deviation:	< 3 minutes
Reflected Beam Deviation:	< 6 minutes
Bevels:	0.010" – 0.030" at 45º
Clear Aperture:	Exceeds central 85% of edge dimension
Reflectance:	R_s ≥ 99.5%
Transmittance:	T_p ≥ 95%
Extinction Ratio: 248-355 nm	T_p/T_s = 100:1
532-1064 nm	T_p/T_s ≥ 200:1
Anti-Reflection Coating:	R < 0.25% per surface, all entrance and exit surfaces

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Polarizers » Cube Beamsplitters, High Power