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具有有源闭合腔的光纤光栅传感系统地址查询技术

Interrogation Techniques for Fiber Bragg Grating Sensor System Based on Active Closed Cavity

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摘要

基于熔融拉锥技术研制的3 dB宽带耦合器的光纤环形镜的工作原理,提出了一种新型的具有有源闭合腔装置的光纤光栅传感系统。在用作闭合共振腔端镜的环形镜中写入十个波分复用光纤光栅传感元,利用共振腔中接入的法布里珀罗滤波器,通过控制电压对传感光栅的波长扫描,实现对传感地址的查询。用非平衡的迈克耳孙扫描干涉仪将传感光栅的波长漂移信息变为相移信息,实现传感信号的解调。系统传感灵敏度的实验值为1.5835 °/10-6ε,与理论值(1.6662 °/10-6ε)基本吻合。

Abstract

A novel fiber Bragg grating (FBG) sensor system with an active closed cavity is proposed according to the principle of fiber loop mirror (FLM) based on 3 dB wideband coupler fabricated by fused biconical taper technique. Ten cascaded wavelength-division-multiplexed (WDM) FBG sensors are fabricated in the FLM acting as an end mirror of a closed cavity resonator. Active interrogation techniques are realized by controlling the applied voltage of the insert tunable Fabry-Pérot filter of the cavity and realizing wavelength scanning. The unbalanced Michelson interferometer transforms the wavelength-shift signal induced by the measured strain into phase-shift signal, and the demodulation is achieved. The experimental sensor sensitivity, 1.5835 °/10-6ε matches the predicted value (1.6662 °/10-6) basically.

Newport宣传-MKS新实验室计划
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中图分类号:TN253

基金项目:教育部新世纪优秀人才支持计划(NCET-04-0828)和广东省自然科学基金重点项目(04105843)资助。

收稿日期:2006-11-23

修改稿日期:2007-02-06

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作者单位    点击查看

曹雪:黑龙江大学光纤技术研究所, 哈尔滨 150080
余有龙:黑龙江大学光纤技术研究所, 哈尔滨 150080暨南大学光电工程研究所, 广州 510632
刘盛春:黑龙江大学光纤技术研究所, 哈尔滨 150080
李若明:暨南大学光电工程研究所, 广州 510632
陈雪峰:黑龙江大学光纤技术研究所, 哈尔滨 150080

联系人作者:曹雪(caoxue170987@sohu.com)

备注:曹雪(1981-),女,黑龙江佳木斯人,硕士研究生,主要从事光纤通信与传感方面的研究。

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引用该论文

曹雪,余有龙,刘盛春,李若明,陈雪峰. Interrogation Techniques for Fiber Bragg Grating Sensor System Based on Active Closed Cavity[J]. Acta Optica Sinica, 2007, 27(8): 1405-1408

曹雪,余有龙,刘盛春,李若明,陈雪峰. 具有有源闭合腔的光纤光栅传感系统地址查询技术[J]. 光学学报, 2007, 27(8): 1405-1408

被引情况

【1】杨薇,刘迎,肖立峰,杨兆祥. 多级级联声光可调谐滤波器旁瓣的抑制. 中国激光, 2009, 36(10): 2734-2739

【2】王玉宝,兰海军. 基于光纤布拉格光栅波/时分复用传感网络研究. 光学学报, 2010, 30(8): 2196-2201

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