Abstract

Traditionally, two typical mechanisms for internal self-pumped phase conjugation (SPPC) generation in photorefractive crystals have been identified. One is stimulated photorefractive backscattering (SPB).¹ The other is total-intemal-reflection (TIR).² SPPC generation with the former depends on SPB interaction. With the later, SPPC generation depends on four-wave mixing (FWM) and total internal reflections. In this case, optical path loop(s) exists in the crystal [Fig. 1(a)].

© 1995 IEEE