Thorlabs offers this holographic reflection grating featuring 1350 grooves/mm for use with TLK Series Littrow Tunable Laser Kits. The gratings are premounted on a pivot arm for easy installation into existing Tunable Laser Kits.
Littrow Grating Item #: TLK-G1350R2*
Compatible Littman Kit: TLK-L1220R
Optimal Center Wavelength:1220 nm
*Position of grating on arm differs between both 1350 grooves/mm products.