QKD系统中相位调制器驱动电路设计  

The drive circuit design of phase modulator module in QKD system

作　　者：李林霞[1] 王永钢[1] 

机构地区：[1]北京邮电大学理学院,北京100876

出　　处：《光通信技术》2010年第4期54-57,共4页Optical Communication Technology

摘　　要：相位调制器是量子密钥分发系统中不可缺少的调制器件,其输出调制信号的脉宽影响量子比特误码率。本文提出一种利用高速高频模拟开关实现相位调制器驱动电路的设计方法,仿真结果显示驱动电路输出电压脉冲脉宽可低于10ns,并能很好地应用到量子密钥分发实验系统中,从理论及实验上对实验方案的可行性及可靠性进行了验证。Phase modulator is an indispensable optical modulator in quantum key distribution as it can affect the quantum bit error rate.A control circuit for driving phase modulator is presented using high-speed and high fi＇equency analog switch.Simulation results show that the output voltage pulse width can be less than 10ns, which can be well applied to quantum key distribution （QKD） system. The feasibility and reliability of the scheme are verified through theoretical analysis and experiment results.

关 键 词：量子密钥分发 相位调制器 纳秒脉冲 模拟开关 

分 类 号：O431[机械工程—光学工程]