光孤子振幅压缩态的产生及检测  

Obtaining and detecting of optical soliton amplitde squeezing state

作　　者：尚旭东[1] 于丽[1] 冯雪冬[1] 杨伯君[1] 

机构地区：[1]北京邮电大学理学院,北京100876

出　　处：《光电子．激光》2008年第6期832-834,共3页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(60378011;60578043);北京市教育委员会共建项目建设计划资助项目(XK100130537)

摘　　要：利用非对称Sagnac干涉仪得到光孤子振幅压缩态,并利用平衡零差探测系统对其进行测量。本文重点讨论了测量孤子压缩态的光电探测器,给出了设计方案以及测试指标。其中3dB带宽约为10MHz,饱和功率约为19mW。利用该探测器测得孤子压缩值约为1.1dB,考虑系统整体探测效率(75%),可达约1.5dB。Soliton amplitude squeezing state is obtained by using an asymmetric Sagnac interferometer,and detected by using a balanced homodyne detecting system. A promoted photo detector drcuit is introduced which is fit for quantum state detecting. The circuit using ETX-500 photodiode has a bandwidth of 10 MHz and the saturation power is about 19mW. A maxi mum photocurrent noise reduction of 1.1 dB bdow shot noise is achieved. Taking the detecting efficiency into account, the squeezing will be about 1.5 dB.

关 键 词：量子通信 压缩态 孤子 探测器 非对称Sagnac干涉仪 

分 类 号：O431.2[机械工程—光学工程]