Polarizing Beamsplitter Cubes (PBS)

Polarizing Cube beamsplitters are constructed by cementing two precision right angle prism together with appropriate interference coating on the hypotenuse surface. The absorption loss to the coating is minimal transmission and reflection approach 50% (average) though output is partially polarized. If polarization sensitivity is critical to your application, we recommended that you select from our Polarization Cube Beamsplitter or Non-polarization Cube Beamsplitter.

Specifications:

Material:--------------------------------------- BK7 grade A, optical glass
Dimension Tolerance: -------------------------------------------- ±0.2mm
Flatness:---------------------------------------------------- λ/4 @ 632.8 nm
Surface Quality:------------------------------------ 60-40 scratch and dig
T/R: ---------------------------------- 50/50±5%, for random polarization
---------------------------------------------T=(Ts+Tp)/2, R=(Rs+Rp)/2
Beam Deviation:---------------------------------------------<3 arc minutes
Coating:
Hypotenuse face:----------------------------------------Partial reflectance
All input and output faces:--------------------------------------AR Coating
Standard Coating wavelength:
Narrow Band: -----488, 532, 632.8, 650, 808, 850, 980, 1064, 1310, 1550 nm
Broadband:----------- 450-650, 650-900, 900-1200, 1200-1550, 1500-1610 nm

Coating:
Hypotenuse surface :Polarization dielectric coating ,
Entrance/Exit surfaces :AR coating
1.Laser line (Extinction Ratio 500:1) ,AOI= 0°:
Tp>96% and Ts<0.2%
Rp<4% and Rs>99.7%
2.Broadband wavelength (Extinction Ratio: 200:1) ,AOI= 0°:
Tp>95% and Ts<0.5%
Rp<5% and Rs>99.5%