Overview:

This 56 Deg Polarizing Plate Beamsplitters transmit p-polarization and reflect s-polarization as the monochromatic beam entering at Brewster’s angle (56° AOI).

They are designed for use in the most demanding lasers. Due to the high laser damage threshold, they are used as an alternative to Glan laser polarizing prisms or cube polarizing beamsplitters. Typical applications are intracavity Q-switch hold-off polarizers or extracavity attenuators for Nd:YAG lasers. Our 56 Deg plalte polarizing beamsplitter can be used at an > 40° angle of incidence, but polarization is most efficient and appears in a broad wavelength range at 56° AOI (Brewster angle).

General Specifications of 56 Deg Polarizing Plate Beamsplitter:

Material	N-BK7, UV Fused Silica
Dimension Tolerance	+0/-0.2mm
Surface Quality	60/40 scratch and dig
Clear Aperture	>90%
Flatness	<λ/8@632.8nm per 25mm
Parallelism	<3 arc minutes
Extinction Ratio	Tp/Ts>100:1
Transmittance	Tp>95%, Ts<0.5%
Reflectance	Rs>99.5%, Rp<5%
Coating	Polarization beamsplitter coating on one face(AOI 56deg, needs to be tuned to optimized AOI in use) Second surface uncoated.
Damage Threshold	>5J/cm2, 20ns, 20Hz, @1064nm

Standard Products of 56 Deg Polarizing Plate Beamsplitter:

Coating Graphs of 56 Deg Polarizing Plate Beamsplitter: