Direct Writing of Quasi-Sinusoidal and Blazed Surface Relief Optical Transmission Gratings in BiGeO, Er: LiNbO and Er: Fe: LiNbO Crystals by Nitrogen Ion Microbeams of 5 MeV and 10.5 MeV Energy.

High diffraction efficiency optical transmission gratings with quasi-sinusoidal and saw-tooth surface relief profiles were fabricated in BiGeO, Er: LiNbO and Er: Fe: LiNbO crystals by ion beam implantation. The gratings were directly written by nitrogen ion microbeams at energies of 5 MeV and 10.5 MeV.