物理学报Issue(8)：1-5,5.DOI:10.7498/aps.62.084214
全光纤量子通信系统中的高速偏振控制方案
High-speed polarization controller for all-fiber quantum communication systems∗
摘要
Abstract
Polarization control is of vital importance in optical communications, which can affect the stability and bit error rate of a system. We demonstrate an all-fiber high-speed polarization control scheme based on a bidirectional Sagnac ring. The polarization direction can be accurately controlled by adjusting the phase difference of an electro-optic fiber phase modulator in the ring, meanwhile it is realized that only a single beam port outputs different polarization states. The phase can be adjusted accuratly to 10−3 rad, giving an extinction ratio as high as 30 dB, and the modulation speed can reach 2 GHz. The system has excellent stability, and as the optical circuit consists of simple, low cost components which can be easily integrated, there are good prospects for its application in quantum cryptography and other optical communcations fields.关键词
光纤偏振控制器/Sagnac环/量子通信Key words
optical fiber polarization controller/Sagnac ring/quantum communications引用本文复制引用
李申,马海强,吴令安†,翟光杰..全光纤量子通信系统中的高速偏振控制方案[J].物理学报,2013,(8):1-5,5.基金项目
国家自然科学基金(批准号:60977033,61177082)和北京市自然科学基金(批准号:4122063)资助的课题.*Project supported by the National Natural Science Foundation of China (Grant Nos.60977033,61177082) and the Beijing Natural Science Foundation, China (Grant No.4122063) （批准号:60977033,61177082）
