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Polarizating Beamsplitter (PBS)

Polarizing Beamsplitters (PBS) splits incident unpolarized light into two perpendicular linearly polarized light. Among them, p-polarized light passes through completely, while s-polarized light is reflected at 45 deg which makes the emitting direction of s-light vertical to p-light. The PBS is composed of a pair of high-precision right-angle prisms cemented together, one of which is coated on the wedged surface which determines the beam splitting ratio. All the incident surfaces and emitting surfaces are AR coated.

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Product Details

WISOPTIC offers both plate and cube PBS for a variety of wavelength ranges and power handling requirements. In addition, birefringent crystals, Brewster windows, and waveplates are also offered for higher-laser damage threshold requirements.

WISOPTIC Specifications - PBS*

Material	N-BK7（H-K9L), H-ZF3, fused quartz
Diameters / Tolerance	0.5×0.5×0.5mm~50×50×50mm / ±0.2 mm
Extinction Ratio	Single band: >1000:1 Broad band: >300:1
Clear Aperture	> 90% of central area
Surface Quality	< 40/20 [S/D]
Flatness	< λ/10 @ 632.8 nm
Parallelism	≤ 10”
Transmitted Light Deviation	＜±3 arcmin
Reflected Light Deviation	90°±3 arcmin
Transmission Ratio	Tp>95%，Ts<1%
Reflection Ratio	Rs>99.5%，Rp<5%
Chamfer	Protective chamfer @ 45°
Coating Wavelength (nm)	Single band: 488, 532, 632.8, 650, 808, 850, 980, 1064, 1310, 1550 Broad band: 450-650, 650-900, 900-1200, 1200-1550, 1500-1610
Laser Damage Threshold	15 J/cm² @ 1064 nm, 20 ns, 20 Hz