光学学报, 2003, 23 (7): 787, 网络出版: 2006-06-27
利用光折变晶体的电光、压电效应实现2×2光开关的原理
Theory of Electric Field-Controlled 2×2 Ptotorefractive Switch
: 非线性光学 光开关 理论分析 光折变晶体 电光效应 压电效应 nonlinear optics optical switch theoretical analysis refractive crystals electrooptical effect piezoelectric effect
摘要
讨论了在光折变LiNbO3晶体中建立电场控制的2×2直通交换开关的原理设计方案.通过控制读出光栅时外加电场的大小使读出光满足或偏离布拉格条件,从而控制衍射效率为1或0,实现开关的交换和直通操作.全面考虑了电场作用下晶体的压电和电光效应,基于衍射效率公式和光栅的布拉格条件,给出了为获得最佳衍射效率比时外加电场及写入光束比与记录角度间的关系曲线.
Abstract
The principle of designing an electric field controlled 2×2 bypass exchange switch in the photorefractive LiNbO 3 crystal is discussed. By controlling the magnitude of the applied electric field, the readout beam can satisfy or deviate the Bragg condition, which makes the diffraction efficiency be 1 or 0, and thus realize the exchange or bypass operation of the switch. Fully regarded the piezoelectric effect, the electrooptic effect caused by the applied electric field and based on the equation of diffraction efficiency and Bragg condition, the of between the applied electric field, the writing beam ratio with respect to the writing angles are analyzed.
董良威, 阎晓娜, 史开源, 颜锦奎. 利用光折变晶体的电光、压电效应实现2×2光开关的原理[J]. 光学学报, 2003, 23(7): 787. 董良威, 阎晓娜, 史开源, 颜锦奎. Theory of Electric Field-Controlled 2×2 Ptotorefractive Switch[J]. Acta Optica Sinica, 2003, 23(7): 787.
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