Miniaturized fiber in-line Mach-Zehnder interferometer based on inner air cavity for high-temperature sensing

被引：81
作者：
Hu, T. Y. [1 ]
Wang, Y. [1 ]
Liao, C. R. [1 ]
Wang, D. N. [1 ]
机构：
[1] Hong Kong Polytech Univ, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China
来源：
OPTICS LETTERS | 2012年 / 37卷 / 24期
关键词：
HIGH-SENSITIVITY; OPTICAL-FIBER; THERMAL-STABILITY; BRAGG GRATINGS; SENSOR;
D O I：
10.1364/OL.37.005082
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We demonstrate a miniaturized fiber in-line Mach-Zehnder interferometer based on an inner air cavity adjacent to the fiber core for high-temperature sensing. The inner air cavity is fabricated by femtosecond laser micromachining and the fusion splicing technique. Such a device is robust and insensitive to ambient refractive index change, and has high temperature sensitivity of similar to 43.2 pm/degrees C, up to 1000 degrees C, and low cross sensitivity to strain. (C) 2012 Optical Society of America
引用
收藏
页码：5082 / 5084
页数：3
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