Material | BK7, UV FS |
Surface Quality | 20-10 scratch & dig (MIL-PRF-13830B) |
Transmitted wavefront distortion | λ/10 @ 633 nm |
Transmission efficiency | Tp>95% |
Extinction ratio Tp/Ts |
>200:1 (for standard and HT series) >1000:1 (for HE series) |
Laser damage threshold | >100 mJ/cm2, 50 fsec pulse, 800 nm typical, 50 Hz |
EKSMA Optics Femtoline Thin Film Laser Polarizers
142.41 kB |
Thin Film Polarizers seperate s- and p-polarization components. Thin Film Polarizers can be used as an alternative to Glan laser polarizing prisms or cube polarizing beamsplitters due to the high damage threshold reaching 100 mJ/cm2, at 800 nm, 50 fsec.
Thin Film Polarizers are used in high energy lasers. They can be used for Yb:KGW/KYW or Ti:Sapphire laser fundamental wavelength and its harmonics or intracavity Q-switch hold-off polarizers. The most efficient way to use thin film laser polarizers is at Brewster angle - 56° ±2 ° with minimal losses. Typical horizontal polarization ratio Tp/Ts is 200:1.