Photorefractivity at 1.5 mgr;m in CdTe:V

摘要

We have for the first time demonstrated twohyphen;beam coupling energy transfer at a wavelength of 1.5 mgr;m. Beam coupling gain coefficients of 0.6 cmminus;1have been obtained in vanadium hyphen;doped CdTe with only 5 mW/cm2incident intensity. These gain coefficients exceed typical gain coefficients in GaAs at 1.06 mgr;m wavelength by 50percnt;. In preliminary measurements using the moving grating technique, we have measured a gain coefficient of 2.4 cmminus;1. Through adjustment of the doping level, CdTe:V can be used as a sensitive photorefractive material through the 0.9ndash;1.5 mgr;m spectral range.