应用于高速MDI-QKD系统的脉冲激光器研制  

Design of a pulse laser applied to high⁃speed MDI⁃QKD system

作　　者：何宗武 黄思诚 温昕澄 马庆力 阴泽杰 HE Zongwu;HUANG Sicheng;WEN Xincheng;MA Qingli;YIN Zejie(State Key Laboratory of Particle Detection and Electronics,University of Science and Technology of China,Hefei 230026,China;Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China;National Synchrotron Radiation Laboratory,University of Science and Technology of China,Hefei 230029,China;Electronic Countermeasure Institute,National University of Defense Technology,Hefei 230038,China)

机构地区：[1]中国科学技术大学核探测与核电子学国家重点实验室,安徽合肥230026 [2]中国科学技术大学近代物理系,安徽合肥230026 [3]中国科学技术大学国家同步辐射实验室,安徽合肥230029 [4]国防科技大学电子对抗学院,安徽合肥230038

出　　处：《量子电子学报》2023年第6期868-878,共11页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金(11975307,11575184)。

摘　　要：在高速测量设备无关量子密钥分发(MDI-QKD)系统中,高成码率是实现远距离量子通信的关键。为实现更高的成码率,系统各环节对光源有着更多的要求。针对这些要求设计了应用于高速MDI-QKD系统的脉冲激光器电路。通过对外部或内部触发信号的模拟调理及驱动设计,实现了脉冲激光的产生;通过模拟PID控制与双向TEC电流控制,实现了温度的稳定。最终获得的脉冲光能够实现最高1.25 GHz重复频率、24.2 ps脉冲半高宽、30 dB消光比、0.95 pm波长抖动以及2.014 nm波长调谐范围的输出,有利于成码率的提高,满足高速MDI-QKD系统的要求。In high-speed machine device independent quantum key distribution(MDI-QKD)systems,high code rate is crucial to realize long-distance quantum communication.To achieve a higher code rate,each link of the system has more requirements on the light source.To meet the requirements,a pulse laser circuit for the high-speed MDI-QKD system is designed.According to the designed pulse laser circuit,by analog processing and driving the external or internal trigger signal,the pulse laser can be generated,and by using analog PID control and bidirectional TEC current control,the internel working temperature of the laser can be stabilized.The outgoing pulse laser can achieve an output with a repetition of up to 1.25 GHz,a full width at half maximum of 24.2 ps,an extinction ratio of 30 dB,a wavelength jitter of 0.95 pm and a wavelength tuning range of 2.014 nm,which is beneficial to the improvement of the code rate and meets the requirements of the high-speed MDI-QKD system.

关 键 词：激光技术 量子密钥分发 脉冲激光 高重复频率 窄脉冲宽度 

分 类 号：TN248[电子电信—物理电子学]