Brewster Angle Polarizer, Air-Spaced High Power Use, High Transmission
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Overview:
The Brewster Angle Polarizer is made of two birefrigent crystal material prisms which are assembled with an air space. It is designed such that for the transmitted extraordinary -p polarization, each of the four faces are at Brewster's angle (computed at about 830nm) which makes transmission loss of -p polarization as practically zero, therefore, no anit-reflective coatings needed. In the meantime, the rejected beam is available for beam splitting/combining applications or safe dumping.
Due to non normal angle of incidence, the transmitted beam suffers a beam displacement which is approximately 6 mm and 11 mm for 5 mm and 10 mm clear aperture Brewster angle polarizer respectively. In its mount, the Brewster angle polarizer is mounted in such a way that the incident beam normal to one of the two aperture holes in the mount is automatically incident at Brewster's angle at the entrance face of the polarizer.
General Specifications of Brewster Angle Polarizer:
| Material |
Calcite, YVO4 |
| Wavelength Range |
Calcite: 350-2300nm; YVO4: 500-4000nm |
| Extinction Ratio |
<5x10-5 |
| Surface Quality |
20/10 scratch and dig |
| Wavefront Distortion |
<λ/4@632.8nm |
| Beam Deviation |
<3 arc minutes |
| Damage Threshold |
>1000MW/cm2 |
| Coating |
No coating, Brewster Angle of Incidence, Tp>98% |
| Mount |
Black Anodized Aluminium |
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Standard Products of Brewster Angle Polarizer:
| Part Number |
Material |
Wavelength
(nm)
|
CA
(mm)
|
Mount
(mm)
|
| BRP-C-08 |
Calcite |
350-2300 |
5.0 |
φ15.0X18.0 |
| BRP-C-10 |
Calcite |
350-2300 |
10.0 |
φ25.4X37.0 |
| BRP-Y-08 |
YVO4 |
500-4000 |
5.0 |
φ18.0X21.0 |
| BRP-Y-10 |
YVO4 |
500-4000 |
10.0 |
φ32.0X40.0 |
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