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.

引用

页数：4

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