读出光偏振态控制的Ce：KNSBN光折变开关

Ce:KNSBN Photorefractive Optical Switch Controlled by the Readout Beam Polarization

摘要:

理论分析了以读出光偏振态控制Ce：KNSBN晶体衍射光强从而实现光折变光开关操作的基本原理：在o光和e光读出条件下实验测量了o光两波耦合写入体光栅的衍射效率与写入光光强比的关系。结果表明，e光读出时最大光栅衍射效率为o光读出的13．6倍；e光读出与o光读出衍射效率之比随写入光强比的变化近似为一常数；Ce：KNSBN晶体具有良好的开关性能。

Abstract:

A photorefractive optical switch in Ce:KNSBN crystal which is implement by adjusting the polarization of the readout beam to control the diffraction efficiency was proposed.The experimentally measured diffraction efficiency while the readout beam is with extraordinary polarization is about 13.6 times of that while the readout beam is with ordinary polarization,which indicates that the Ce:KNSBN crystal possess excellent optical switch property.