Dielectric Brewster (Thin Film) Polarizer

Thin film polarizers are dielectric coated glass substrates designed for use at Brewsters angle. The Brewster angle design results in a relatively good polarization purity (typically 200:1) at low cost. Since the transmitted p-polarization is not reflected from the glass surface, an anti-reflection ...Read more

Thin film polarizers are dielectric coated glass
substrates designed for use at Brewsters angle.

These are high damage threshold, economical p
olarizers, typically used for Q-switching.


FEATURES

Two polarized beams

Low Polarization Purity
Suitable for high power applications



Thin film polarizers are dielectric coated glass substrates designed for use at Brewsters angle. The Brewster angle design results in a relatively good polarization purity (typically 200:1) at low cost. Since the transmitted p-polarization is not reflected from the glass surface, an anti-reflection coating on the back side is not required.

These are high damage threshold, economical polarizers, typically used for Q-switching.

When using thin film polarizers, the lateral offset of the transmitted beam must be taken into account. This depends on the thickness of the substrate. Thin film polarizers function for one wavelength only.


FEATURES

Two polarized beams

Low Polarization Purity
Suitable for high power applications

Range of dimensions: 2mm – 75mm

Highest available surface figure: l/10 (DIN: 3/0,2)

Highest available surface quality: 20-10 S/D (DIN: 5/2x0,1)

Highest available tolerance of beam deviation: 3” (arcsec)

Highest available extinction ratio: 200:1

High power version for single wavelengths: ~10 J/cm2 at 1064nm for 10 nsec pulse