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首页> 外文会议>Conference on Integrated Optics Devices Ⅴ Jan 23-25, 2001, San Jose, USA >All optical control of self-pumped phase conjugation from BaTiO_3:Co photorefractive crystal
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All optical control of self-pumped phase conjugation from BaTiO_3:Co photorefractive crystal

机译：BaTiO_3：Co光折变晶体自泵浦相共轭的全光学控制

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摘要

We investigate self-pumped phase conjugation (SPPC) generation process and its temporal instability, to demonstrate an all optical control of SPPC output. The optical configuration (incident angle and position) region at which stable SPPC output is obtainable by effective stimulated photorefractive backscattering-four wave mixing (SPB-FWM) process is limited. Therefore, with non-optimized optical configuration, cat conjugation occurs together with SPB-FWM and then SPPC output becomes temporally unstable. The same is the case with even when the optical configuration is fixed as SPB-FWM interaction length becomes longer. We discuss the cause of temporal instability to propose the beam trajectory model when SPPC output is unstable, based on the experimental results using a new method inducing the control beam whose wavelength is different from the incident beam simultaneously. Moreover, using the method mentioned previously, we demonstrate an all optical control of SPPC output and the generation of temporally stable SPPC output with the optical configuration that SPPC output has been temporally unstable in the conventional methods. Extending the generation region of stable SPPC output will lead to the generation of SPPC from high power lasers in simple system. Moreover, it will also contribute to the realization of all optical image processing and computing, for example, multiple parallel image subtraction and addition.
机译：我们调查自泵浦相位共轭（SPPC）的产生过程及其时间不稳定性，以证明SPPC输出的全光学控制。通过有效的受激光折射后向散射四波混合（SPB-FWM）工艺可获得稳定SPPC输出的光学配置（入射角和位置）区域受到限制。因此，在未优化的光学配置下，猫共轭与SPB-FWM一起发生，然后SPPC输出在时间上变得不稳定。即使当光学配置固定时SPB-FWM交互长度变长，情况也是如此。我们基于实验结果，采用一种新的方法，同时诱导出波长不同于入射光束的控制光束，讨论了时间不稳定的原因，提出了SPPC输出不稳定时的光束轨迹模型。此外，使用前面提到的方法，我们展示了SPPC输出的全光学控制以及具有在传统方法中SPPC输出在时间上不稳定的光学配置的时间稳定SPPC输出的生成。扩展稳定的SPPC输出的生成区域将导致在简单的系统中由高功率激光器生成SPPC。而且，它将也有助于所有光学图像处理和计算的实现，例如，多个并行图像的减法和加法。

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