Infrared photorefractive passive phase conjugation with BaTiO3: Demonstrations with GaAlAs and 1.09hyphen;mgr;m Ar+lasers

摘要

We report photorefractive passive phase conjugation of GaAlAs laser radiation at 815ndash;865 nm and Ar+laser radiation at 1090 nm. A ring passive phase conjugate mirror was used with BaTiO3as the realhyphen;time holographic gain medium. With GaAlAs lasers phase conjugate reflectivities of up to 16percnt; uncorrected for Fresnel losses were recorded. Effects of the strong associated feedback to the laser and attempts at mode locking are described. At 1090 nm the reflectivity remains approximately the same, but with a significantly longer time constant.