Fiber In-Line Mach-Zehnder Interferometer Embedded in FBG for Simultaneous Refractive Index and Temperature Measurement

被引：110

作者：

Liao, C. R. ^{[1
]}

Wang, Ying ^{[1
,2
]}

Wang, D. N. ^{[1
]}

Yang, M. W. ^{[1
]}

机构：

[1] Hong Kong Polytech Univ, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China

[2] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2010年 / 22卷 / 22期

关键词：

Femtosecond laser micromachining; fiber sensors; interferometer; STRAIN; WAVELENGTH; GRATINGS;

D O I：

10.1109/LPT.2010.2079924

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：

An ultracompact optical fiber sensor based on a Mach-Zehnder interferometer (MZI) embedded in fiber Bragg grating (FBG) is proposed and experimentally demonstrated for simultaneous refractive index (RI) and temperature measurement. By use of the resonant wavelength of the FBG and the interference dip of the MZI, the RI and temperature of the surrounding medium can be unambiguously determined. The interesting properties of the sensor include good operation linearity, extremely high RI sensitivity up to similar to-9148 nm/RI unit in the RI range between 1.30 and 1.325, and precise sensing location, determined by the MZI cavity created.

引用

页码：1686 / 1688

页数：3

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