Title :
Environmentally Stable Fabry–PÉrot-Type Strain Sensor Based On Hollow-Core Photonic Bandgap Fiber
Author :
Shi, Qing ; Lv, Fuyun ; Wang, Zhi ; Jin, Long ; Hu, Juan Juan ; Liu, Zhanyuan ; Kai, Guiyun ; Dong, Xiaoyi
Author_Institution :
Nankai Univ., Tianjin
Abstract :
We design and demonstrate a miniature all-fiber Fabry-Perot (F-P) interferometric sensor based on hollow-core photonic bandgap fiber where the strain is gauged by measuring the spectrum shift of the reflected optical signal. The F-P cavity in the order of millimeters is fabricated by simple techniques of cleaving and fusion splicing. The sensitivity of the sensor is 1.55 pm/muepsiv at the wavelength of 1550 nm and the contrast of the intensity reaches 4-6 dB. Temperature and bend insensitivity and excellent repeatability of the sensor make it convenient for a wide range of applications.
Keywords :
Fabry-Perot interferometers; fibre optic sensors; optical fibre fabrication; photonic band gap; spectral line shift; splicing; strain sensors; Fabry-Perot cavity; Fabry-Perot interferometric sensor; cleaving; fusion splicing; hollow-core photonic bandgap fiber; intensity contrast; sensor sensitivity; spectrum shift; strain sensor; Capacitive sensors; Fabry-Perot; Optical design; Optical interferometry; Optical sensors; Optoelectronic and photonic sensors; Photonic bandgap fibers; Signal design; Strain measurement; Temperature sensors; Bend insensitivity; Fabry–PÉrot (F-P); hollow-core photonic bandgap fiber (HCPBF); strain sensor; temperature insensitivity;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.913335
