具有不同偏振反馈方向的氦氖激光器的偏振特性

Polarization characteristics of He-Ne laser with different directions of polarized feedback.

作者信息

Wu Yun, Tan Yidong, Zhang Shulian, Zeng Zhaoli, Li Yan

机构信息

The State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University, Beijing, China.

出版信息

Appl Opt. 2013 Aug 1;52(22):5371-5. doi: 10.1364/AO.52.005371.

DOI:10.1364/AO.52.005371

PMID:23913053

Abstract

A polarizer is placed in an external feedback cavity to form polarized optical feedback. The effect of the different directions of polarized optical feedback on laser polarization characteristics (LPCs) is investigated experimentally and theoretically. The angle between the optical axis of the polarizer and the laser polarization is changed from 0° to 90°. It is found that LPCs vary greatly under different directions of polarized optical feedback. The angle range can be divided into five zones (two flipping zones, ⊥-polarization zone, bistable zone, and ∥-polarization zone) according to the different LPCs. When the angle is in the range of the ⊥-polarization zone (∥-polarization zone), the laser outputs ⊥-polarization (∥-polarization). Thus, one can choose either ⊥-polarization or ∥-polarization by properly aligning the axis of the polarizer.

摘要

在外部反馈腔中放置一个偏振器以形成偏振光反馈。通过实验和理论研究了不同方向的偏振光反馈对激光偏振特性（LPC）的影响。偏振器光轴与激光偏振之间的角度从0°变化到90°。发现在不同方向的偏振光反馈下，LPC变化很大。根据不同的LPC，该角度范围可分为五个区域（两个翻转区域、⊥偏振区域、双稳区域和平行偏振区域）。当角度处于⊥偏振区域（平行偏振区域）范围内时，激光输出⊥偏振（平行偏振）。因此，通过适当地调整偏振器的轴，可以选择⊥偏振或平行偏振。