偏振耦合装置

Abstract

The invention provides a polarization coupling device. The polarization coupling device comprises a rectangular prism, a rhombic prism and a 1/2 wave plate. A first right angle plane of the rectangular prism faces towards the direction of an incident laser. The length of a first long edge plane of the rhombic prism is equal to the length of an bevel edge plane of the rectangular prism, either the first long edge plane or the bevel edge plane or both the first long edge plane and the bevel edge plane are plated by a polarization spectroscopic film layer and are closely attached to the polarization spectroscopic film layer to form a polarizing beamsplitting interface. A second long edge plane of the rhombic prism is plated by a laser all reflective film, a first short edge plane of the rhombic prism faces the direction of the incident laser, and a second short edge plane of the rhombic prism serves as a laser sending plane. The 1/2 wave plate is located at the front end of a light path of the first right angle plane of the rectangular prism when the polarization spectroscopic film layer is an S polarized light high permeability P polarized light high reflective film, and the 1/2 wave plate is located at the front end of a light path of the first short edge plane of the rhombic prism when the polarization spectroscopic film layer is a P polarized light high permeability S polarized light high reflective film. According to the polarization coupling device, the size of a light beam of a single laser light source can be compressed.
本发明提供了一种偏振耦合装置。该偏振耦合装置包括:直角棱镜,其第一直角面朝向入射激光的方向;斜方棱镜,其第一长边面与直角棱镜斜边面的长度相等,两者至少其中之一镀偏振分光膜层后紧密贴合,形成偏振分光界面;其第二长边面镀激光全反膜;其第一短边面朝向入射激光方向,其第二短边面作为激光出射面;1/2波片,在偏振分光膜层为S偏振光高透P偏振光高反膜时,该1/2波片位于直角棱镜的第一直角面的光路前端;在偏振分光膜层为P偏振光高透S偏振光高反膜时,该1/2波片位于斜方棱镜的第一短边面的光路前端。本发明偏振耦合装置能够实现对单独一个激光光源的光束尺寸进行压缩。

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Cited By (2)

    Publication numberPublication dateAssigneeTitle
    CN-103217803-AJuly 24, 2013中国科学院半导体研究所采用棱镜的半导体激光器偏振耦合装置
    CN-104656264-AMay 27, 2015华为技术有限公司Polarization beam splitting and combining device