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Polarization-selective beam splitter based on a highly efficient simple binary diffraction grating

机译:基于高效简单二进制衍射光栅的偏振选择分束器

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摘要

A polarization beam splitter (PBS) based on a giant-reflection to zero-order (GIRO) grating is presented. The GIRO grating is a simple binary diffraction grating with parameters chosen such that the excited optical modes in the grating interfere constructively and destructively at the respective interfaces. This interference results in high-zero-order reflection (>99%) with a high polarization-selective extinction ratio (±30 dB). The grating shows a low aspect ratio. The GIRO PBS is theoretically and experimentally shown to be an adequate PBS for use as an optical isolator in combination with a quarter-wave plate in a CO_(2)-laser system.
机译:提出了一种基于巨反射零级光栅的偏振分束器(PBS)。 GIRO光栅是一个简单的二进制衍射光栅,其参数经过选择,使得光栅中的激发光学模式在各个界面处相长和相消。这种干扰会导致高零阶反射(> 99%),并具有高偏振选择性消光比(±30 dB)。光栅显示出较低的纵横比。 GIRO PBS在理论上和实验上都证明是与CO_(2)激光系统中的四分之一波片结合用作光隔离器的适当PBS。

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