Ideal for use with broadband femtosecond pulses@1020-1060 nm
High reflectivity over a very broad band:
     +/-50 nm @ 1040 nm
  or +/-20 nm @ 520 nm (the second harmonic)
 Low group delay dispersion (GDD).
 Optically robust with a high damage threshold.
 Both 45^o and 0^o angle of incidence (AOI) are available.
  s-pol at 45^o gives higher reflectance, broader operating range and smaller
  GDD. Use s-pol when possible.
Substrate material: BK7 or UVFS glass.   Dia 1" or 2"