几种新型全反射棱镜式环形激光器的模式选择技术  

Mode-Selection techniques for ring laser with the Total Reflection Prisms

作　　者：张勇 闫康乐 郑隽鹏 王晨星 王子园 ZHANG Yong;YAN Kangle;ZHENG Junpeng;WANG Chenxing;WANG Ziyuan(Shanxi Dazhong Electronic Information Industry Group Co.,Ltd,Taiyuan 030024,China)

机构地区：[1]山西大众电子信息产业集团有限公司,山西太原030024

出　　处：《光学技术》2023年第1期46-50,共5页Optical Technique

摘　　要：根据全反射棱镜式环形激光器(TRPRL)的矩阵光学理论和环形He-Ne激光器内环形激光的工作理论,研究了TRPRL的激光模式选择技术方法,可令环形激光器内的顺时针和逆时针两个方向上的激光工作在单谱线、单横模、单纵模的状态,从而在环形激光器内形成稳定的驻波,输出到光电探测器上稳定的干涉条纹信号波形。采用缩短TRPRL的毛细管直径方法,可抑制3.39μm谱线;由于TRPRL的特殊的环形激光器结构,采用分立式特殊结构设计的选频光阑,选频光阑可以放到环形激光器的光路任意位置处,而多个选频光阑即可有效抑制1.15μm的谱线;根据不同波长激光腰斑半径的不同,在光腰处采用特制的椭圆小孔光阑,抑制0.63μm激光的高阶横模。对于TRPRL在全反射棱镜式激光陀螺(TRPLG)中的应用具有重要意义。Based on the matrix optics theory of the Total Reflection Prism Ring Laser(TRPRL) and the working theory of the ring laser in the Ring He-Ne Laser, mode-selection techniques for ring laser with the Total Reflection Prisms are studied. The clockwise and counterclockwise laser in the ring laser can work in the state of single spectral line, single transverse mode and single longitudinal mode, so as to form a stable standing wave in the ring laser, thus a stable interference fringe signal waveform is output to the photodetector. By shortening the capillary diameter of TRPRL, 3.39μm spectral lines can be suppressed;Because of the special structure of ring laser of TRPRL,the Frequency-selecting Diaphragm designed with the special split structure can be placed at any position of the optical path of the ring laser, and multiple Frequency-selecting Diaphragm can effectively suppress 1.15μm spectral line;Based on the different beam waist spot radius of laser with different wavelengths, a special elliptical small aperture diaphragm can be used at the beam waist to suppress 0.63μm Higher Order Transverse Modes of laser. It is of great significance for the application of TRPRL in Total Reflection Prism Laser Gyro(TRPLG).

关 键 词：环形激光器 全反射棱镜 模式选择 光阑 

分 类 号：TN965[电子电信—信号与信息处理]