Ibsen Photonics A/S offers pulse compression gratings in 100% fused silica with a dielectric back-side antireflection coating for femtosecond laser pulse compression at both 1064 and 800 nm. The gratings can survive the high-power output of these lasers. They are designed standard for Littrow angle incidence and a resolution of 1250 ±0.1 lines per millimeter. Greater than 90% transmission efficiency is guaranteed. Gratings with other resolutions and wavelengths, including UV, can be custom-made.