Multi-parameter sensor using fiber In-line MZ Interferometer Embedded in Fiber Bragg Grating

被引:2
|
作者
Liao, C. R. [1 ]
Wang, Ying [1 ]
Wang, D. N. [1 ]
Yang, Minwei [1 ]
机构
[1] Hong Kong Polytech Univ, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China
关键词
Optical fiber sensor; femtosecond laser micromachining; fiber Bragg grating; Mach-Zehnder interferometer; REFRACTIVE-INDEX; FEMTOSECOND LASER; TEMPERATURE;
D O I
10.1117/12.865566
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 propose an ultra compact optical fiber sensor integrating a Mach-Zehnder interferometer (MZI) in fiber Bragg grating (FBG) 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/RIU (RI unit) in the RI range between 1.30 and 1.325 and precise sensing location, determined by the MZI cavity created.
引用
收藏
页数:4
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