Third harmonic phase-shifted Bragg grating sensor

被引：4

作者：

Yang, Qiaochu ^{[1
]}

Hao, Yueying ^{[1
]}

Long, Xueting ^{[1
]}

Wu, Yang ^{[1
]}

Yue, Xu ^{[1
]}

Cai, Jiexuan ^{[1
]}

Xu, Zhiyuan ^{[1
]}

Ran, Yang ^{[1
]}

Jin, Long ^{[1
]}

Guan, Bai-Ou ^{[1
]}

机构：

[1] Jinan Univ, Inst Photon Technol, Guangdong Prov Key Lab Opt Fiber Sensing & Commun, Guangzhou 511443, Peoples R China

来源：

OPTICS LETTERS | 2022年 / 47卷 / 08期

关键词：

FIBER LASER; PHOTOTHERMAL THERAPY; NANOPARTICLES;

D O I：

10.1364/OL.457540

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Improving sensitivity is critical for the higher-order harmonic fiber Bragg grating sensors. To this aim, in this work, we have successfully introduced the phase-shift into the third harmonic fiber Bragg grating for tailoring a double-dip spectrum with a high finesse notch. The dual dips showed reversed responses for the intensity regarding the change of the temperature or axial strain, enabling a highly sensitive measuring regime using the intensity contrast between the two dips. Deduced from the sinusoidal responding curves, the highest temperature and the axial strain sensitivity could reach 0.964 dB/degrees C, and 0.0257 dB/mu epsilon, three-fold times the other intensity-based fiber sensors. This work may promote the higher-order harmonic gratings into applications for enriching wavelength utilization. (C) 2022 Optica Publishing Group

引用

页码：1941 / 1944

页数：4

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