Brewster Windows are uncoated substrates that can be used in series as polarizers, or to clean up a partially polarized beam. When positioned at Brewster’s Angle, the P-polarized component of the light enters and exits the window without reflection losses, while the S-polarized component is partially reflected. The graph to the right shows reflectance for both S- and P-polarization through UV fused silica at 633 nm. The 20-10 scratch-dig surface quality and λ/10 transmitted wavefront error of our Brewster windows make them an ideal choice for laser cavities.


Basic Parameters

Product IDPA04014
MaterialBK7 Grade A, UV Grade Fused Silica
Dimension Tolerance+0.0/-0.2mm
Thickness Tolerance±0.2mm
Surface Quality20/10
Clear Aperture>90%
Wavefront Distortion<λ/10@633nm
Parallelism<10 arc seconds
Damage Threshold>20J/cm2, 20ns, 20Hz, 1064nm


  • Laser Cavity


  • Zero reflection for p-polarization
  • 20% reflectance for s-polarization
  • Uncoated, high damage threshold
  • Used in laser cavities
 Brewster Windows Spectrogram
Brewster Windows Spectrogram

Related Products​