基于保偏光子晶体光纤的长尾式光纤环镜角度传感器

doi:10.12068/j.issn.1005-3026.2016.02.003

东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (2): 161-164.DOI: 10.12068/j.issn.1005-3026.2016.02.003

基于保偏光子晶体光纤的长尾式光纤环镜角度传感器

吴迪^1,2，赵勇^1,2

(1. 东北大学信息科学与工程学院，辽宁沈阳110819； 2. 东北大学流程工业综合自动化国家重点实验室，辽宁沈阳110819)

收稿日期:2014-12-16 修回日期:2014-12-16 出版日期:2016-02-15 发布日期:2016-02-18
通讯作者: 吴迪
作者简介:吴迪(1989-)，女，辽宁鞍山人，东北大学博士研究生；赵勇(1973-)，男，辽宁沈阳人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(61273059，61203206)；流程工业综合自动化国家重点实验室基础科研业务费资助项目(2013ZCX02-05)；中央高校基本科研业务费专项资金资助项目(N140404023).

Torsion Sensor Based on Polarization-Maintaining Photonic Crystal Fiber Loop Mirror with an Output Port Probe

WU Di^1,2， ZHAO Yong^1,2

1. School of Information Science & Engineering， Northeastern University， Shenyang 110819， China; 2. State Key Laboratory of Synthetical Automation for Process Industries， Northeastern University， Shenyang 110819， China.

Received:2014-12-16 Revised:2014-12-16 Online:2016-02-15 Published:2016-02-18
Contact: ZHAO Yong
About author:-
Supported by:
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摘要/Abstract

摘要： 针对扭转角度的精确测量问题，提出一种基于保偏光子晶体光纤的长尾式光纤环镜角度传感器.采用对温度不敏感的保偏光子晶体光纤作为扭转角度的传感单元，当保偏光子晶体光纤被旋转一定角度时，其双折射值会发生改变，进而影响光在环镜系统内的干涉情况，最终表现为光谱仪上干涉谱的移动.理论推导出系统的传感规律后，实验测得该传感器在扭转角度为0°～101°的范围内，灵敏度为0.0617nm/(°)；若光谱仪分辨率为0.01nm，则系统最小分辨力为0.16°，并具有超低的温度灵敏度-0.6pm/℃.该角度传感器具有体积小、成本低、对温度不敏感及可用于远距离传输等优点.

关键词: 保偏光子晶体光纤, 长尾式光纤环镜, 角度传感器, 高灵敏度, 温度不敏感

Abstract: Focused on measuring twist angle precisely，a torsion sensor was proposed which was based on a section of polarization-maintaining photonic crystal fiber(PM-PCF) outside an optical fiber loop. Due to the low thermal coefficient of PM-PCF， the PM-PCF was used as the sensing element. When the PM-PCF is rotated with a certain angle， the birefringence of the PM-PCF will change either. The interference within the fiber loop mirror was observed via the optical spectrum analyzer (OSA). The response of the sensor was deduced theoretically and experimentally demonstrated. Experimental result showed that the sensitivity of the developed torsion sensor could reach 0.0617nm/(°) in the range from 0° to 101° and a resolution of 0.16° was achieved since the OSA had a wavelength measurement resolution of 0.01nm. In addition， the sensor has an ultra-low temperature sensitivity of -0.6pm/℃. The proposed fiber-optic torsion sensor is attractive due to its compact size， low cost， insensitivity to temperature and suitability for long-distance transmission beyond what conventional sensors can offer.

Key words: PM-PCF (polarization-maintaining photonic crystal fiber), fiber loop mirror with an output port probe, torsion sensor, high sensitivity, temperature-insensitive

中图分类号:

TH74

吴迪，赵勇. 基于保偏光子晶体光纤的长尾式光纤环镜角度传感器[J]. 东北大学学报:自然科学版, 2016, 37(2): 161-164.

WU Di， ZHAO Yong. Torsion Sensor Based on Polarization-Maintaining Photonic Crystal Fiber Loop Mirror with an Output Port Probe[J]. Journal of Northeastern University Natural Science, 2016, 37(2): 161-164.

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基于保偏光子晶体光纤的长尾式光纤环镜角度传感器

Torsion Sensor Based on Polarization-Maintaining Photonic Crystal Fiber Loop Mirror with an Output Port Probe

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