Highly sensitive force sensor based on optical microfiber asymmetrical Fabry-Perot interferometer

被引：41

作者：

Gong, Yuan ^{[1
]}

Yu, Cai-Bin ^{[1
]}

Wang, Ting-Ting ^{[1
]}

Liu, Xiu-Ping ^{[1
]}

Wu, Yu ^{[1
]}

Rao, Yun-Jiang ^{[1
]}

Zhang, Ming-Lei ^{[1
]}

Wu, Hui-Juan ^{[1
]}

Chen, Xiao-Xiao ^{[2
]}

Peng, Gang-Ding ^{[3
]}

机构：

[1] Univ Elect Sci & Technol China, Key Lab Opt Fiber Sensing & Commun, Minist Educ China, Chengdu 611731, Peoples R China

[2] Natl Ctr Qual Inspect Sensors, Natl Inst Measurement & Testing Technol, Chengdu 610021, Peoples R China

[3] Univ New S Wales, Sch Elect Engn & Telecommun, Sydney, NSW 2052, Australia

来源：

OPTICS EXPRESS | 2014年 / 22卷 / 03期

基金：

中国国家自然科学基金; 高等学校博士学科点专项科研基金;

关键词：

PHOTONIC CRYSTAL FIBERS; BRAGG GRATING SENSOR; TEMPERATURE; DISPLACEMENT; CALIBRATION; RESONATORS; SILICA;

D O I：

10.1364/OE.22.003578

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An asymmetrical Fabry-Perot interferometric (AFPI) force sensor is fabricated based on a narrowband reflection of low-reflectivity fiber Bragg grating (LR-FBG) and a broadband Fresnel reflection of the cleaved fiber end. The AFPI sensor includes a section of microfiber made by tapering and it achieves a force sensitivity of 0.221pm/mu N with a tapered microfiber of 40mm length and 6.1 mu m waist diameter. Compared with similar AFPI structure in 125 mu m-diameter single mode fiber, the force sensitivity of the microfiber AFPI structure is greatly enhanced due to its smaller diameter and can be optimized for different force scales by controlling the diameter. The fabrication process of the AFPI sensor is simple and cost-effective. The AFPI sensor has better multiplexing capacity than conventional extrinsic fiber-optic Fabry-Perot sensors, while it also release the requirement on the wavelength matching of the FBG-pair-based FPI. (C) 2014 Optical Society of America

引用

页码：3578 / 3584

页数：7

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