激光技术2011，Vol.35Issue(3)：356-359,4.DOI:10.3969/j.issn.1001-3806.2011.03.018
基于亚波长偏振光栅的空间光桥接器设计
Design of optical hybrids based on a subwavelength polarization grating
摘要
Abstract
For the coherent detection of laser beams in free space, a new 2 ×4 90° optical hybrid for freely propagating laser beams was proposed based on the diffraction and polarization characteristics of a subwavelength polarization grating. It mainly consists of a subwavelength polarization grating, two haft-wave-plates and two polarization splitters. The split and recombination of the signal beam and the local oscillator beam are achieved through the subwavelength polarization grating. The desired phase relation is obtained when orthogonally polarized beam components of the left-circularly and right-circularly polarized light are spatially separated under given conditions so that the rigid phase requirement for the beam splitters in traditional space optical hybrids is avoided and stable phase output can be obtained easily. It has potential applications in field of free-space laser coherent communication.关键词
光学器件/光学相干探测/光学桥接器/亚波长偏振光栅/90°相移Key words
optical devices/ optical coherent detection/ optical hybrid/ subwavelength polarization grating/ 90°phase shift分类
信息技术与安全科学引用本文复制引用
万玲玉,班卫华,卢智勇..基于亚波长偏振光栅的空间光桥接器设计[J].激光技术,2011,35(3):356-359,4.基金项目
国家自然科学基金资助项目(10964001) （10964001）
中国科学院空间激光通信及检验技术重点实验室开放课题资助项目 （）
