传输时延对光纤光栅解调精度的影响研究  

Effects of transmission delay on fiber grating demodulation accuracy

作　　者：谢杨[1] 刘健夫[1] 姚国珍[1] 李宝罡[1] 李永倩[1] 

机构地区：[1]华北电力大学电子与通信工程系,河北保定071003

出　　处：《光通信研究》2010年第4期19-22,共4页Study on Optical Communications

基　　金：国家"八六三"计划资助项目(2006AA09Z141);教育部留学回国人员科研基金资助项目(教外司留[2005]383号)

摘　　要：文章针对基于可调谐Fabry-Peort(F-P)滤波法的光纤光栅温度传感系统,从理论上分析了由光缆长度引起的传输时延对波长解调精度的影响。通过数值模拟得出以下结论:解调系统的扫描频率为4 Hz时,对于一定长度的光缆,传输时延引起的波长测量值误差为7.911 pm/km,相应的温度误差约为0.8℃/km,且随着扫描频率的增高,温度误差成倍增大。With regard to fiber grating temperature sensor systems that are based on the tunable Fabry-Peort（F-P） filter method,effects of the transmission delay caused by cable length on the wavelength demodulation accuracy is theoretically studied.Numerical simulation results show that when the scan frequency of the demodulation system is 4 Hz,the error of the wavelength measurement for a certain length of optical cable caused by transmission delay is 7.911 pm/km,the corresponding temperature error is about 0.8 ℃/km,which is multiplied with the increase of the scan frequency.

关 键 词：传输时延 精度 光纤光栅 解调系统 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]