光学学报, 2020, 40 (10): 1014002, 网络出版: 2020-04-28
基于光外差锁相的激光偏振控制与高偏振消光比的光束合成 
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Polarization Control and Laser Combination with High Polarization Extinction Ratios Based on Optical Heterodyne Detection and Phase Locking
图 & 表
图 1. 光外差拍频检测偏振相位原理图
Fig. 1. Principle of polarization phase detection by optical heterodyne beat frequency
图 2. 光外差锁相的两路激光偏振合成系统的装置图
Fig. 2. Schematic diagram for polarization beam combination system of two beams by the optical heterodyne phase locking
图 3. 经相位调制信号调制前后的拍频信号及频谱。(a)未加相位调制信号时光电探测器探测到的零差拍频信号;(b)(c)增加相位调制信号后光电探测器探测到的外差拍频的信号和频谱;(d)混频解调后的误差信号
Fig. 3. Homodyne beat signal and spectrum before and after modulation by phase modulation signal. (a) Homodyne beat signal detected by photodetector without phase modulation; (b)(c) heterodyne beat signal and its spectrum detected by photodetector with phase modulation added; (d) error signal after mixing demodulation
图 5. 激光锁相系统的开环Bode图和Nyquist图。(a) Bode图;(b) Nyquist图
Fig. 5. Bode and Nyquist diagrams of laser phase-locked system in open loop. (a) Bode diagram; (b) Nyquist diagram
图 6. 误差信号及其相位噪声谱。(a)开环和闭环的误差信号;(b)系统闭环时的相位噪声谱
Fig. 6. Error signal and power spectral density of phase noise. (a) Error signal in open and closed loops; (b) power spectral density of phase noise in closed loop
图 7. 锁相前后光斑强度的光斑快照。(a)~(c)三张未锁相时的光斑强度变化的快照;(d)(e)锁相后的最小功率和最大功率的光斑快照
Fig. 7. Snapshots of the spot intensity profiles before and after phase locking. (a)-(c) Three snapshots of the spot intensity profiles without phase locking; (d)(e) spot snapshots after phase locking in the lowest and highest powers
邹星星, 沈辉, 全昭, 尤阳, 刘美忠, 张璟璞, 何兵, 周军, 张建华. 基于光外差锁相的激光偏振控制与高偏振消光比的光束合成[J]. 光学学报, 2020, 40(10): 1014002. Xingxing Zou, Hui Shen, Zhao Quan, Yang You, Meizhong Liu, Jingpu Zhang, Bing He, Jun Zhou, Jianhua Zhang. Polarization Control and Laser Combination with High Polarization Extinction Ratios Based on Optical Heterodyne Detection and Phase Locking[J]. Acta Optica Sinica, 2020, 40(10): 1014002.
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