Infrared photorefractive passive phase conjugation with BaTiO3: Demonstrations with GaAlAs and 1.09-μm Ar+ lasers

Cronin-Golomb, Mark; Lau, Kam Y.; Yariv, Amnon
September 1985
Applied Physics Letters;9/15/1985, Vol. 47 Issue 6, p567
Academic Journal
We report photorefractive passive phase conjugation of GaAlAs laser radiation at 815–865 nm and Ar+ laser radiation at 1090 nm. A ring passive phase conjugate mirror was used with BaTiO3 as the real-time holographic gain medium. With GaAlAs lasers phase conjugate reflectivities of up to 16% 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.


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