Numerical and Experimental Analysis of Sensitivity-Enhanced RI Sensor Based on Ex-TFG in Thin Cladding Fiber

被引：43

作者：

Yan, Zhijun ^{[1
,2
]}

Sun, Zhongyuan ^{[1
]}

Zhou, Kaiming ^{[1
]}

Luo, Binbin ^{[1
,3
]}

Li, Jianfeng ^{[1
,4
]}

Wang, Hushan ^{[2
]}

Wang, Yishan ^{[2
]}

Zhao, Wei ^{[2
]}

Zhang, Lin ^{[1
]}

机构：

[1] Aston Univ, Aston Inst Photon Technol, Birmingham B4 7ET, W Midlands, England

[2] Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R China

[3] Chongqing Univ Technol, Dept Elect Engn, Chongqing 400050, Peoples R China

[4] Univ Elect Sci & Technol China, Sch Optoelect Informat, Chengdu 610054, Peoples R China

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2015年 / 33卷 / 14期

基金：

英国工程与自然科学研究理事会;

关键词：

Refractive index (RI) sensing; sensitivity; tilted fiber grating (TFG); LONG-PERIOD GRATINGS; TRANSITION MODE; INDEX; DISPERSION; POINT;

D O I：

10.1109/JLT.2015.2422076

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We report a highly sensitive refractive index (RI) sensor in the aqueous solution, which is based on an 81 degrees-tilted fiber grating structure inscribed into a thin cladding fiber with 40 mu m cladding radius. The numerical analysis has indicated that the RI sensitivity of cladding resonance mode of the grating can be significantly enhanced with reducing cladding size. This has been proved by the experimental results as the RI sensitivities of TM and TE resonance peaks in the index region of 1.345 have been increased to 1180 nm/RIU and 1150 nm/RIU, respectively, from only 200 and 170 nm/RIU for the same grating structure inscribed in standard telecom fiber with 62.5-mu m cladding radius. Although the temperature sensitivity has also increased, the change in temperature sensitivity is still insignificant in comparison with RI sensitivity enhancement.

引用

页码：3023 / 3027

页数：5

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