These thin film polarizers have been designed to provide superior performance in ultrafast Ti:Sapphire regenerative amplifiers. While pulse lengths are relatively long in these amplifiers, pulse dispersion is still a concern if pulse width is to be maintained in the recompressed pulse. Multiple round trips in the amplifier have a multiplying effect on the dispersive characteristics of any optic in the cavity. For this reason, substantial effort has been made in designing and testing these polarizers for minimum pulse dispersion.
- Minimum pulse dispersion
- Ultra broadband or high extinction versions
- Low wavefront distortion
Angular tuning may be required to achieve maximum transmission. High-quality N-BK7 substrates afford minimal wavefront distortion. These ultrafast polarizers are rectangular, 14.3 x 28.6 x 3.2 mm.
Our UP.25 coating provides maximum bandwidth and laser damage resistance. The UP.25 coating has a bandwidth of 700–900 nm and a polarization extinction of 5:1. This design also tends to support higher laser energy density.
Our UP.26 coating provides maximum polarization extinction. The UP.26 coating features a polarization extinction of 95:1 over a bandwidth of 785 to 815 nm.