Author Affiliations
Abstract
1 State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China
2 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
3 College of Physics and Electronic Engineering, Shanxi University, Taiyuan 030006, China
4 School of Science, North University of China, Taiyuan 030051, China
5 School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore
6 College of Science, Zhejiang University of Technology, Hangzhou 310023, China
We designed and demonstrated experimentally a silicon photonics integrated dynamic polarization controller. The overall size of the dynamic polarization controller on chip is 2.830 mm×0.210 mm×1 mm. The modulation bandwidth is 30 kHz. By using a variable step simulated annealing approach, we achieve a dynamic polarization extinction ratio greater than 25 dB. A numerical simulation method was used to optimize the relevant parameters of the dynamic polarization controller. It is expected that the dynamic polarization controller can be utilized in fiber communication systems or silicon photonics integrated quantum communication systems to minimize the size and decrease the cost further.
dynamic polarization controller simulated annealing approach dynamic polarization extinction ratio 
Chinese Optics Letters
2022, 20(4): 041301
作者单位
摘要
1 上海交通大学电子工程系区域光纤通信网与新型光通信系统国家重点实验室, 上海 200240
2 西北大学电子工程系, 陕西 西安 710069
报道了可光纤集成相干态量子身份认证实验系统。该系统采用偏振相干态的斯托克斯矢量作为量子信号载体,采用动态偏振控制器作为信号调制器,利用固有的相干态量子噪声保证系统的安全性。自行设计了脉冲激光驱动电路、微弱窄脉冲激光探测电路、信号同步模块,采用Socket网络通信程序在TCP/IP局域网中实现了量子保密通信所需要的经典通信。该相干态量子身份认证系统采用的运行密钥为12位,每个光脉冲包含40000个光子,传输速率达到8 kbit/s,合法用户间误码率(BER)小于10-4。每传输一个比特信息,攻击者所能窃取的信息量I(Alice,Eve)<10-14 bit。
量子光学 量子密码 量子身份认证 动态偏振控制器 相干态量子噪声 
中国激光
2007, 34(7): 924

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