光纤法布里珀罗腔传感器双波长解调法及波长优化设计

王婷婷; 王鸣; 李明; 陆敏

光学学报, 2005, 25 (10): 1297, 网络出版: 2006-05-23

光纤法布里珀罗腔传感器双波长解调法及波长优化设计

Dual-Wavelength Demodulation and Wavelength Optimization for Optical Fiber Fabry-Pérot Sensor

论文大纲

王婷婷 ^*王鸣李明陆敏

作者单位

摘要

提出了光纤法布里珀罗(F-P)腔传感器的双通道双波长解调方法,并在此基础上建立了传感器的实验解调系统。理论分析与实验研究了双波长法解调光纤法布里珀罗腔传感器的基本原理,证明了双波长双通道解调法可以补偿传感器光网中和波长无关的变动引起的误差。根据已知的法布里珀罗腔传感器初始腔长和腔两端面反射率,从腔长变化的动态范围、线性、灵敏度等方面考虑,对工作波长以及线宽进行了优化设计。对双波长双通道解调系统进行了实验和数据分析,经最小二乘法拟合后的线性拟合度达到98.35%。实验结果表明:该方法可满足解调光纤法布里珀罗腔传感器在灵敏度、响应速度以及稳定度上的要求。

Abstract

A technique for demodulating the fiber Fabry-Pérot (F-P) cavity sensor is presented based on the dual-path and dual-wavelength demodulation principle. The dual-path sensor system is constructed. Theoretical analysis, simulation calculations and experimental result of the dual-path and dual-wavelength demodulation F-P cavity sensor are presented. It is proved that the method can eliminate errors resulting from wavelength-independent variations in the fiber interconnected to the sensor. According to the known initial cavity length and reflectivity, two operating wavelengths and their bandwidths are determined by optimal parameter selection. After least square fitting, the related linear regression coefficient of the experimental result is 98.35%. The experimental results show that the method can satisfy the demands of sensitivity, response speed and stability at the same time.

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王婷婷, 王鸣, 李明, 陆敏. 光纤法布里珀罗腔传感器双波长解调法及波长优化设计[J]. 光学学报, 2005, 25(10): 1297. 王婷婷, 王鸣, 李明, 陆敏. Dual-Wavelength Demodulation and Wavelength Optimization for Optical Fiber Fabry-Pérot Sensor[J]. Acta Optica Sinica, 2005, 25(10): 1297.

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