Abstract

Self-pumped phase conjugation (SPPC) by near-forward stimulated thermal scattering was observed in nematic liquid crystals (NLC) with absorbers.^1,2 The threshold of parametric generation (caused by thermal nonlinearity) for pumping waves of equal intensity is much higher in low-absorption NCL, which makes SPPC more difficult to achieve. However, it is this kind of media that can be used for SPPC of high-average-power laser beams. In this work we studied possibilities of reducing the parametric generation threshold in low-absorbing NLC with a nonreciprocal loop scheme.

© 1994 IEEE