Photorefractive Self-Bending and High-Performance KNSBN:Cu Crystal Self-pumped Phase-Conjugator

The mechanism for the high-performance KNSBN:Cu crystal self-pumped phase-conjugator is first put forward in this letter as no-loop photorefractive self-bending succesive four-wave mixing interaction. And the photorefractive backscattering amplification was found to play a very important role in it.