Highly Sensitive Dual Parameter Sensor Based on a Hybrid Structure with Multimode Interferometer and Fiber Bragg Grating Fabricated by Femtosecond Laser

被引：6

作者：

Dong, Xinran ^{[1
]}

Li Zeng ^{[2
]}

Chu, Dongkai ^{[3
]}

Sun, Xiaoyan ^{[2
]}

机构：

[1] Cent South Univ Forestry & Technol, Coll Mech & Elect Engn, 498 South Shaoshan St, Changsha 410004, Peoples R China

[2] Cent South Univ, Coll Mech & Elect Engn, State Key Lab High Performance Complex Mfg, 932 South Lushan St, Changsha 410083, Peoples R China

[3] Shandong Univ, Ctr Adv Jet Engn Technol CaJET, Sch Mech Engn, 17923 Jingshi Rd, Jinan 250061, Peoples R China

来源：

SENSORS | 2021年 / 21卷 / 17期

基金：

中国国家自然科学基金;

关键词：

MMF interferometer; femtosecond laser; FBG; dual-parameter sensing; MACH-ZEHNDER INTERFEROMETER; TEMPERATURE-MEASUREMENTS; STRAIN; TAPER;

D O I：

10.3390/s21175938

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A hybrid sensing configuration for simultaneous measurement of strain and temperature based on fiber Bragg grating (FBG) written in an offset multimode fiber (MMF) interferometer using femtosecond laser pulse is proposed and demonstrated. A Mach-Zehnder interferometer is formed by splicing a section of MMF between two single-mode fibers (SMFs) and a high interference fringe of up to 15 dB is achieved. The sensing experimental results show a strain sensitivity of -1.17 pm/mu epsilon and 0.6498 pm/mu epsilon for the dip of MZI and Bragg peak, while a temperature sensitivity of 42.84 pm/degrees C and 19.96 pm/degrees C is measured. Furthermore, the matrix analysis has found that the strain and temperature resolution of the sensor are as high as +/- 12.36 mu epsilon and +/- 0.35 degrees C, respectively. In addition, the sensor has merits of simple fabrication, good spectral quality, and high resolution, which shows attractive potential applications in dual-parameter sensing.

引用

页数：10

共 36 条

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