相位误差对光栅磁场传感器性能影响分析  

The influence of phase error to the measurement performance for electromagnetic sensor

作　　者：冯奎[1] 朱勇[1] 苏洋[1] 彭晖[1] 

机构地区：[1]解放军理工大学通信工程学院,南京210007

出　　处：《光通信技术》2009年第9期50-52,共3页Optical Communication Technology

基　　金：国家自然科学基金(60871075)资助

摘　　要：基于偏振效应的光纤光栅磁场传感方案,具有对温度和应力等因素不敏感的特点。在利用相位掩模法进行光栅制作时会产生随机相位误差、线性啁啾和非线性啁啾等相位误差,通过建立数学模型,对不同相位误差对该传感方案性能的影响进行仿真分析。结果表明,相位误差没有改变PDL峰值与磁场的线性关系,但对传感系统的精确度和灵敏度产生影响。The scheme of measuring magnetic field based on the polarized effect has the advantages of insensitive to temperature and stress. The principle of measuring the magnetic field is analyzed and simulated using the coupled mode theory. In the phase mask grating fabrication process will produce such as random, linear and nonlinear chirp phase error, three types of mathematical model of phase error are established for simulate and analyze the performance of sensor system. It is shown that the linear relationship between PDL peak value and the magnetic field have no changed with phase error. But the sensor system accuracy and sensitivity are changed.

关 键 词：光纤布喇格光栅 法拉第效应 偏振相关损耗 相位误差 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]