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Polarization Beamsplitter Cubes

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Polarization Beamsplitter Cubes

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Beamsplitters are used to split or combine beam of light. The most common types provided by Tensun is plates and cubes. Plates are used for most laser applications as they exhibit low absorption. Cubes are a convenient, protected form for low power applications. The performance of beamsplitters are mainly dependent on the coating specifiications. 

Beamsplitters cubes:

Beamsplitters plate:

Material

BK7, SF

Dimension Tolerance±0.2mm
Thickness Tolerance±0.2mm
Extinction Ratio>100:1 for broadband, >500:1 for narrow band
Surface Quality60/40 scratch and dig
Surface Flatness

λ/4 @632.8nm

Beam Deviation3 arc minute
Principal Transmittance

Narrow: Tp>95%, Ts<1%

Broadband: Tp>90%, Ts<1%

Principal Reflectance

Narrow: Rs>99%, Rp<5%
Broadband: Rs>99%, Rp<10%

Coating

Polarization beamsplitter coating on hypotenuse face

AR or BBAR coating on all input and output faces

 Note: Custom sizes and wavelength are available upon request.