摘要
利用琼斯矩阵分析了Porro棱镜的相位延迟,并根据相位延迟情况设计了补偿波片。在Porro棱镜的最大延时下,得到两对补偿波片0.57λ/0.43λ(对波长为λ的光束产生0.57×2π/0.43×2π的相位延迟)和0.93λ/0.07λ。利用琼斯矩阵仿真了两对波片的补偿情况,结果表明,0.93λ/0.07λ波片能实现补偿的方位角范围为3.6°,约为波片0.57λ/0.43λ的3.6倍,接近实际实验结果(3.1倍)。此外,较宽的角度调节范围在方便调节激光器的同时能提高激光器的稳定性,为Porro棱镜谐振腔的相位延迟补偿提供了新思路。
The orthogonal Porro prism resonant cavity has strong anti-detuning characteristics under shock vibration conditions, so it has a wide range of applications in the military and aerospace fields. The ridge line is typically set at 45° when using Porro prisms. A wave plate must be added to compensate for the phase delay introduced by the Porro prism. Quartz Porro prisms are generally compensated by 0.57λ wave-plates(where λ is the wavelength of light). In practice, the optimal compensation azimuth angle range of 0.57λ wave-plates is relatively narrow, and there are numerous azimuths near the wave-plate’s best azimuth angle. Therefore, it is equivalent to weakening the anti-detuning ability of the Porro prism. This study reported that a 0.93λ wave-plate could compensate for the phase retardation of Porro prisms. The 0.93λ wave-plate has a wide optimal compensation range angle, and no angle is close to the optimal compensation range angle. It provides new ideas for the phase delay compensation of Porro prisms.Objective In the optical system shown in Fig.2,the effective reflectivity of the polarizer is calculated by using the Jones matrix and the relationship between the phase delay of the Porro prisms for linearly polarized light and the Porro ridge angle are analyzed.The resonant cavity shown in Fig.4,the Porro prism ridge line,is placed at 45°/135°,and the resonant cavity is at a low-Qstate when the Q-switch is without high voltage.It is calculated by Jones matrix that two groups of 0.57λ/0.43λand 0.93λ/0.07λcan make the resonant cavity in a low-Qstate.Since the two wave plates in each group of wave-plates are complementary,the 0.57λ and 0.93λ wave-plates are selected for theoretical analysis and experimental comparison.The Jones matrix is used to perform the theoretical simulation of the compensation of the two wave-plates,and the experimental verification is performed in the resonant cavity shown in Fig.4 based on the hypothetical simulation results.The wave-plate is installed in an adjustable fra
作者
李之通
赵一鸣
李祚涵
庞庆生
Li Zhitong;Zhao Yiming;Li Zuohan;Pang Qingsheng(Beijing Research Institute of Telemetry,Beijing 100076,China)
出处
《中国激光》
EI
CAS
CSCD
北大核心
2021年第21期29-34,共6页
Chinese Journal of Lasers
