A polarization-independent torsion sensor based on the near-helical long period fiber grating

被引：12
|
作者：
Han, Zhihang [1 ]
Sun, Cuiting [1 ]
Jin, Xiren [1 ]
Jiang, Hang [1 ]
Yao, Chong [1 ]
Zhang, Shuo [1 ]
Liu, Weiliang [1 ]
Geng, Tao [1 ]
Peng, Feng [2 ]
Sun, Weimin [1 ]
Yuan, Libo [3 ]
机构：
[1] Harbin Engn Univ, Coll Sci, Harbin 150001, Heilongjiang, Peoples R China
[2] Univ Jinan, Sch Phys & Technol, Jinan 250022, Shandong, Peoples R China
[3] Guilin Univ Elect Technol, Photon Res Ctr, Guilin 541004, Peoples R China
来源：
CHINESE OPTICS LETTERS | 2018年 / 16卷 / 10期
基金：
中国国家自然科学基金;
关键词：
FREQUENCY CO2-LASER PULSES; WRITTEN;
D O I：
10.3788/COL201816.100601
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A torsion sensor based on the near-helical (NH) long period fiber grating (LPFG) is fabricated by using a high frequency pulsed CO2 laser. Each groove of the NH-LPFG is spirally written in the four sides of a single-mode fiber. The NH-LPFG has a helical periodic vertical index modulation. This is different from the screw-type index modulation of the common helical LPFGs (H-LPFGs) fabricated in a twisted fiber. The torsion and temperature characteristics of the NH-LPFG are experimentally investigated. The temperature sensitivity is about 0.0668 nm/degrees C. The torsion sensitivity is 0.103 nm/(rad/m) and independent of the polarization state of incident light.
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页数：4
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