双折射
光学
相位板
材料科学
相(物质)
光通信
光学工程
补偿(心理学)
Crystal(编程语言)
物理
光电子学
激光器
计算机科学
量子力学
程序设计语言
心理学
精神分析
作者
Jiali Wu,Xizheng Ke,Derui Ding,Shangjun Yang
出处
期刊:Optical Engineering
[SPIE - International Society for Optical Engineering]
日期:2021-04-23
卷期号:60 (04)
标识
DOI:10.1117/1.oe.60.4.045106
摘要
Based on the birefraction of crystals and phase retardation of wave plate, a 2 × 4 90-deg crystal spatial optical hybrid is designed. It is comprised of three birefringent optical plates, λ / 4 wave plate and two λ / 2 wave plates. By splitting and recombining the signal beam and local oscillator beam, four mixed beams with phase shift of 90 deg are obtained. The mathematical model of the mixer is established by Jones matrices. The results show that the hybrid has low insertion loss, and by rotating the wave plate, the phase difference and split ratio between in-phase and quadrature-phase can be changed. It proved that the crystal hybrid design method we proposed has good performance; the phase compensation and splitting ratio adjustment scheme is simple, effective, and feasible; and it can be applied to free-space coherent optical communication system well.
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