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Thresholdless High-Gain Optical Phase Conjugator for High-Power Laser Beam Correction

机译:高功率激光束校正的无阈值高增益光学相位共轭器

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High power laser experiences beam distortion due to thermal-opto effects and output optics. Research indicates that passive nonlinear optical phase conjugation (OPC) methods have shown the promise in dramatically improving wavefront and beam quality with improved time dependent pointing stability performance. Although OPC holds the promising in laser beam corrections it has some limitations connected with the high threshold requirements of non-linear medium used for the OPC-mirror operation with relatively low conjugated reflectivity. The practical realization of the laser beam wavefront-error-free system for some applications requires optical phase conjugator with an ultra low energy level of the signal beam, in the order of 10~(-16) J per pulse. Therefore, the ultra-low threshold OPC-mirror with high reflectivity needs to be developed for the practical nonlinear optical wave-front correction system.
机译:高功率激光由于热光效应和输出光学器件而导致光束失真。研究表明,无源非线性光学相位共轭(OPC)方法已显示出有望显着改善波前和光束质量以及改进的时间依赖性指向稳定性能。尽管OPC在激光束校正方面前景看好,但它具有一些局限性,与用于OPC镜操作的非线性介质的高阈值要求相关,共轭反射率相对较低。为了在某​​些应用中实现激光束波前无差错系统的实际实现,需要具有信号束能量水平极低的光学相位共轭器,每个脉冲的能量级约为10〜(-16)J。因此,需要为实际的非线性光学波前校正系统开发具有高反射率的超低阈值OPC镜。

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