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基于3×3耦合器的光纤光栅激光传感系统波长解调方案的改进

Improvement of Wavelength Interrogation for Fiber Bragg Grating Laser Sensor System Based on 3×3 Couplers

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摘要

采用3×3耦合器的光纤光栅激光传感系统(FBGLS)的波长解调结果依赖于3×3耦合器的物理特性,解调结果会因3×3耦合器三路输出的直流项、干涉条纹可见度和相位差参数的不稳定而发生一定程度的失真。理论推导给出了标定参数的方法并实现了计算机编程,能够在较大信号时实时给出标定结果,同时给出了相应的解调方案。计算机模拟发现采用上述方法消除了由3×3耦合器三路输出的参数不稳定带来的谐波,实验中解调结果的对比表明该方法带来一定程度的改善,和标准参考传感器测量结果有很高的相关性,此外基于该解调方案的光纤光栅激光传感系统具有较高的分辨率、动态范围和线性度。

Abstract

The wavelength demodulation of fiber Bragg grating laser sensor (FBGLS) system with 3×3 couplers depend on the physical characteristics of the 3×3 couplers. The demodulated results will distort to some extent due to the instability of the parameters in the three outputs of 3×3 couplers including the direct current (DC) component, the fringe visibility of interferometer and the phase difference. A method of measuring the above parameters is given and applied in the computer programming so as to measure the parameters in real-time under large signals, at the same time corresponding demodulation method is also introduced. The computer simulation shows that with the proposed method the appearance of harmonics caused by the instability of the parameters in the three outputs of 3×3 couplers is eliminated. The comparison of the experimentally demodulated results also shows that with the proposed method the harmonics have been reduced and the demodulated results have high correlation coefficients with the reference sensor. Besides, high resolution, dynamic range and linearity of the demodulated results are given in the experiment by using the proposed method.

Newport宣传-MKS新实验室计划
补充资料

中图分类号:TN 253;TP 212.14

所属栏目:光纤元件

收稿日期:2007-11-16

修改稿日期:2008-02-29

网络出版日期:0001-01-01

作者单位    点击查看

冯磊:中国科学院半导体研究所光电系统实验室, 北京 100083
肖浩:中国科学院半导体研究所光电系统实验室, 北京 100083
张松伟:中国科学院半导体研究所光电系统实验室, 北京 100083
何俊:中国科学院半导体研究所光电系统实验室, 北京 100083
李芳:中国科学院半导体研究所光电系统实验室, 北京 100083
刘育梁:中国科学院半导体研究所光电系统实验室, 北京 100083

联系人作者:冯磊(fenglei@semi.ac.cn)

备注:冯磊(1983-),男,山西人,硕士研究生,主要从事光纤传感系统信号解调方面的研究。

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引用该论文

Feng Lei,Xiao Hao,Zhang Songwei,He Jun,Li Fang,Liu Yuliang. Improvement of Wavelength Interrogation for Fiber Bragg Grating Laser Sensor System Based on 3×3 Couplers[J]. Chinese Journal of Lasers, 2008, 35(10): 1522-1527

冯磊,肖浩,张松伟,何俊,李芳,刘育梁. 基于3×3耦合器的光纤光栅激光传感系统波长解调方案的改进[J]. 中国激光, 2008, 35(10): 1522-1527

被引情况

【1】毛欣,黄俊斌,顾宏灿. 采用3×3耦合器的分布反馈式光纤激光传感器解调技术. 发光学报, 2017, 38(3): 395-401

【2】刘俊承,张自超,余波,高峰. 3×3耦合器解调过程中的偏振分析与处理. 光子学报, 2019, 48(1): 106002--1

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