摘要
干涉型传感器的输出会出现偏振诱导信号衰落现象.根据偏振态可以为任意情况,对消偏振衰落技术进行了理论分析和仿真研究.得出了采用对n路检测信号进行平方取和的方法时,n≥3的情况下,输出最小值与最大值之比恒为1/3的结论.提出了在实际中选择n=3为合适取值.
Polarization fading phemomena alway appear in the output of fibre interferometric sensor. Based on the fact that the polarization form can be any status, the technique of eliminating polarization-induced-fading is theoretically analyzed and simulated. If the method of summing the square of n detected signals is used, when n≥3, the ratio between the output minimum and the maximum is always 1/3.It is concluded that n=3 is the best choice in practice.
出处
《应用科技》
CAS
2004年第8期22-23,26,共3页
Applied Science and Technology
关键词
干涉型光纤传感器
分集检测
偏振衰落
诱导信号
interferometric fiber optic sensor
polarization fading
divide/combine technique
