基于模式理论的EFPI传感器输出干涉谱分析  

Analysis on Output Interference Spectrum of EFPI Fiber Optic Sensors Based on Modal Theory

作　　者：周孟然[1] 范礼[1] 

机构地区：[1]安徽理工大学电气与信息工程学院,安徽淮南232001

出　　处：《半导体光电》2014年第2期194-196,200,共4页Semiconductor Optoelectronics

基　　金：国家自然科学基金和神华集团有限公司联合项目(51174258);安徽省自然科学基金项目(11040606M103);安徽省高校自然科学研究重点项目(J2011A0973)

摘　　要：运用模式理论研究分析了单模光纤法布里-珀罗传感器(EFPI)在白光条件下的输出干涉谱,理论推导出反射光干涉光谱的归一化函数表达式,分析得到输出干涉谱受法布里-珀罗腔的腔长和耦合系数的相位变化的共同影响,并与传统几何光学的方法相比较。通过计算机仿真,可以清晰看出各参数与输出干涉谱的关系。其研究结论为高精度和高准确度的法布里-珀罗系统的实现提供了更为精确的理论基础。The model theory was used to analyze the output interference spectrum of single- mode Fabry-Perot interferometer （EFPI） fiber optic sensor in the condition of＇white light. From this analysis, the normalized function expression of interference spectrum of reflected lights was theoretically derived and the effects on output interference spectrum caused by the FP cavity length and the phase change of the coupling coefficient were analyzed and also compared with the traditional method of geometrical optics. The relationship between the parameters and the output interference is clearly illustrated through computer simulation. The research result provides a high accurate theoretical basis for further research on high precision and high accuracy Fabry- Perot system.

关 键 词：法布里-珀罗传感器 模式理论 输出干涉谱 条纹对比度 耦合系数 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]