High-speed robust polarization modulation for quantum key distribution

被引：47

作者：

Li, Yang ^{[1
,2
,3
,4
]}

Li, Yu-Huai ^{[1
,2
,3
,4
]}

Xie, Hong-Bo ^{[1
,2
,3
,4
]}

Li, Zheng-Ping ^{[1
,2
,3
,4
]}

Jiang, Xiao ^{[1
,2
,3
,4
]}

Cai, Wen-Qi ^{[1
,2
,3
,4
]}

Ren, Ji-Gang ^{[1
,2
,3
,4
]}

Yin, Juan ^{[1
,2
,3
,4
]}

Liao, Sheng-Kai ^{[1
,2
,3
,4
]}

Peng, Cheng-Zhi ^{[1
,2
,3
,4
]}

机构：

[1] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[2] Univ Sci & Technol China, Dept Modem Phys, Hefei 230026, Anhui, Peoples R China

[3] Univ Sci & Technol China, Chinese Acad Sci, Ctr Excellence, Shanghai 201315, Peoples R China

[4] Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Shanghai 201315, Peoples R China

来源：

OPTICS LETTERS | 2019年 / 44卷 / 21期

基金：

上海市自然科学基金; 中国国家自然科学基金;

关键词：

FREE-SPACE; DISTRIBUTION-SYSTEM; SECURE;

D O I：

10.1364/OL.44.005262

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Polarization modulation plays a key role in polarization-encoding quantum key distribution (QKD). Here, we report a new, to the best of our knowledge, polarization modulation scheme based on an inherently stable Sagnac interferometer. The presented scheme is free of polarization mode dispersion and calibration as well as insensitive to environmental influences. Successful experiments at a repetition frequency of 1.25 GHz have been conducted to demonstrate the feasibility and stability of the scheme. The measured average quantum bit-error rate of the four polarization states is as low as 0.27% for 80 consecutive minutes without any adjustment. This high-speed intrinsically stable polarization modulation can be widely applied to many polarization-encoding QKD systems, such as BB84, MDI, etc. (C) 2019 Optical Society of America

引用

页码：5262 / 5265

页数：4

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