High Sensitivity Twist Sensor Based on Helical Long-Period Grating Written in Two-Mode Fiber

被引：94
|
作者：
Zhang, Liang [1 ,2 ]
Liu, Yunqi [1 ]
Zhao, Yunhe [1 ]
Wang, Tingyun [1 ]
机构：
[1] Shanghai Univ, Sch Commun & Informat Engn, Key Lab Specialty Fiber Opt & Opt Access Networks, Shanghai 200072, Peoples R China
[2] Nanjing Xiaozhuang Univ, Sch Elect Engn, Nanjing 211171, Jiangsu, Peoples R China
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2016年 / 28卷 / 15期
基金：
中国国家自然科学基金;
关键词：
Helical long-period grating; two-mode fiber; twist sensor; FREQUENCY CO2-LASER PULSES; TORSION SENSOR; TEMPERATURE; RESONANCE; COUPLER;
D O I：
10.1109/LPT.2016.2555326
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We demonstrate the fabrication of the helical long-period grating (HLPG) in a two-mode fiber (TMF) with CO2 laser. The torsion characteristics of the helical gratings are experimentally investigated. It was found that the resonance wavelength of the TMF-HLPG linearly shifts with a twist sensitivity of 0.47 nm/(rad/m), which is an order magnitude higher than that of the conventional long-period fiber gratings (LPFGs). The temperature sensitivity of the TMF-HPFG was measured to be 23.9 pm/degrees C, which is one third of that of the conventional LPFGs. The proposed TMF-HLPG-based twist sensor would have a promising application for the twist monitor.
引用
收藏
页码：1629 / 1632
页数：4
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