可编程光纤延时系统特性

Characteristics of Programmable Optical Fiber Delay System

采用17个光开关和16段不同长度光纤的级联方式,搭建了一套可编程光纤延时系统,实现的延时范围为0~65535 ns,步长为1 ns,数据刷新率可达100 Hz,延时稳定性为0.2 ns,延时抖动小于0.32 ns,整套系统损耗小于31 dB。对可编程光纤延时系统的延时精度、损耗和数据刷新率等特性进行了研究,分析了损耗和色散对延时测量的影响,提出了一种减少延时测量误差的阈值补偿法,弥补了损耗和色散引起的延时测量误差。

A programmable optical fiber delay system is built by using 17 optical switches and 16 optical fibers with different lengths.The system can realize the delay range of 0-65535 ns,step length of 1 ns,maximum data refresh rate of 100 Hz,delay stability of 0.2 ns,jitter delay less than 0.32 ns,and loss less than 31 dB.The delay accuracy,loss,and data refresh rate of the programmable optical fiber delay system are studied.The influences of loss and dispersion on delay measurement are analyzed.A threshold compensation method to reduce delay measurement error is proposed to compensate for the delay measurement error caused by loss and dispersion.