Residual amplitude modulation and its mitigation in wedged electro-optic modulator

被引：16
|
作者：
Li, Zhixiu [1 ,2 ]
Tian, Yuhang [1 ,2 ]
Wang, Yajun [1 ,2 ]
Ma, Weiguang [2 ,3 ]
Zheng, Yaohui [1 ,2 ]
机构：
[1] Shanxi Univ, Inst Optoelect, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan 030006, Shanxi, Peoples R China
[2] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China
[3] Shanxi Univ, Inst Laser Spect, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan 030006, Shanxi, Peoples R China
来源：
OPTICS EXPRESS | 2019年 / 27卷 / 05期
基金：
中国国家自然科学基金;
关键词：
QUANTUM-NOISE REDUCTION; FREQUENCY-MODULATION; BACKGROUND SIGNALS; SQUEEZED VACUUM; BAND; GENERATION; CRYSTAL; LIGHT;
D O I：
10.1364/OE.27.007064
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We theoretically analyze and experimentally investigate the dependence of residual amplitude modulation (RAM) on the beam radius within the electro-optic crystal (EOC), the wedge angle of the EOC and the overlap efficiency between the extraordinary and ordinary beams, and the overlap efficiency is determined by the distance from the wedge facet to the downstream polarizer. The results show that the RAM with the maximum optical path difference Delta at the edge of light spot presents a sinc-like curve, and the magnitude of Delta is directly proportional to the beam radius and the wedge angle. As a scaling factor, with the decrease of the overlap efficiency between the ordinary and extraordinary beams, the RAM can be further reduced. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码：7064 / 7071
页数：8
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