摘要
近年来分布式光纤传感器(DOFS)发展很快,利用四波混频脉冲移位的分布式光纤传感器(FPMDOFS)是最近提出的一种新型分布式光纤传感技术,本文对FPMDOFS中stokes/anti-stokes频移进行了理论分析,给出频移计算公式,并指出在激励光脉冲功率衰减较大的情况下,应考虑由自相位调制引起的stokes/anti-stokes中心频率偏移。
DOFS(Distributed Optical-Fiber Sensor) is an active field of research in recent Distributed Optical-Fiber Sensing by four-photon mixing pulse walk-off is a noval technique that was recently presented. In the paper, we analyze the stokes or anti-stokes light's .frequency shift in FPM DOFS, and give the calculating formula. We also point out that the frequency shin due to SPM (Self-Phase Modulation )should be considered, if the peak power of pump light is attenuated too much.
出处
《光通信技术》
CSCD
北大核心
1997年第1期46-50,共5页
Optical Communication Technology
关键词
分布式
光纤传感器
四波混频
频移
FPMDOFS
Distributed optical-fiber sensing
Four-wave mixing
Stokes light
Anti-stokes light
Frequency shift