光楔式光纤法布里-珀罗传感器相关干涉信号特性分析  

Characteristic Analysis of Correlation Interference Signals in Optical Wedge Type Fiber Fabry-Perot Sensors

作　　者：陈青青 唐瑛 王可宁[1] 陈海滨[1] 马志波[2] Chen Qingqing;Tang Ying;Wang Kening;Chen Haibin;Ma Zhibo(School of Optoelectronics Engineering,Xi＇an Technological University,Xi＇an,Shaanxi 710021,China;Shaanxi Provincial of Key Laboratory of Micro and Nano Electromechanical Systems Laboratory,Northwestern Polytechnical University,Xi＇an,Shaanxi 710072,China)

机构地区：[1]西安工业大学光电工程学院,陕西西安710021 [2]西北工业大学陕西省微/纳米系统重点实验室,陕西西安710072

出　　处：《激光与光电子学进展》2018年第11期108-114,共7页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(31671002);陕西省光电测试与仪器技术重点实验室开放基金(2015SZSJ-60-3)

摘　　要：为了精确提取相关干涉信号的峰值位置,为光楔式光纤法布里-珀罗传感器的相关干涉解调机制提供理论借鉴,数值模拟了3种典型的光源光谱分布的相关干涉信号,并对所获得的相关干涉信号进行了详细的对比分析,综合讨论了不同光源光谱分布条件下,光谱带宽对相关干涉信号宽度、幅值以及对比度的影响。分析结果表明,当光源在光谱上具有高斯分布且带宽较大时,得到的相关干涉信号噪声较小、条纹更稀疏、信号对比度更高,更便于准确寻峰和实现高精度的解调。In order to accurately extract the peak positions of reference for the demodulation mechanism of the correlation correlation interference signals and provide a theoretical interference of an optical wedge type fiber Febry-Perot sensor, the correlation interference signals of three typical spectral distributions of light source are numerically simulated and the obtained correlation interference signals are analyzed in detail. Moreover, the influence of spectral bandwidth on the width, amplitude and contrast ratio of the correlation interference signals is discussed under the condition of different spectral distributions. The analysis results show that the correlation interference signals have relatively small noises, sparse stripes and high signal contrasts when the light source has a Gaussian spectral distribution and a relatively large bandwidth. It is beneficial to search peaks accurately and realize a high precision demodulation.

关 键 词：光纤光学 光纤法布里-珀罗传感器 相关干涉信号 峰值位置 光谱分布 信号对比度 

分 类 号：TP212.6[自动化与计算机技术—检测技术与自动化装置]