基于螺旋芯长周期光纤光栅的高灵敏度应变传感器。

High-sensitivity strain sensor based on a helical-core long-period fiber grating.

作者信息

Ma Yiwei, Sun Jing, Zhang Min, Zhao Min, Su Chunbo, Chen Xudong, Liu Zhihai, Geng Tao, Sun Weimin, Yuan Libo

出版信息

Opt Lett. 2022 Aug 1;47(15):3748-3751. doi: 10.1364/OL.463020.

Abstract

A highly sensitive strain sensor based on a helical-core long-period fiber grating (HC-LPFG) is proposed and experimentally investigated. The helical core is fabricated in the common single-mode fiber by using a high-frequency CO laser and hydrogen-oxygen flame. This helical shape core of the structure experienced the highly centralized refractive index modulation, which enhances the strain sensitivity and shortens the length of the sensing area to 2 mm. Experimental results indicate that the maximum strain sensitivity of the HC-LPFG reaches -97 pm/µɛ within the measuring range of 0-400 µɛ.

摘要

提出并通过实验研究了一种基于螺旋芯长周期光纤光栅（HC-LPFG）的高灵敏度应变传感器。通过使用高频CO激光和氢氧火焰在普通单模光纤中制造螺旋芯。该结构的这种螺旋形芯经历了高度集中的折射率调制，这提高了应变灵敏度并将传感区域的长度缩短至2 mm。实验结果表明，在0-400 µɛ的测量范围内，HC-LPFG的最大应变灵敏度达到-97 pm/µɛ。