Environmentally Stable Fabry-PÉrot-Type Strain Sensor Based On Hollow-Core Photonic Bandgap Fiber

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 techniqu...

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Bibliographic Details
Published in:IEEE photonics technology letters 2008-02, Vol.20 (4), p.237-239
Main Authors: Shi, Qing, Lv, Fuyun, Wang, Zhi, Jin, Long, Hu, Juan Juan, Liu, Zhanyuan, Kai, Guiyun, Dong, Xiaoyi
Format: Article
Language:English
Subjects:
Bend insensitivity
Capacitive sensors
Fabry-Perot
Fabry-PÉrot (F-P)
hollow-core photonic bandgap fiber (HCPBF)
Optical design
Optical interferometry
Optical sensors
Optoelectronic and photonic sensors
Photonic bandgap fibers
Signal design
Strain measurement
strain sensor
temperature insensitivity
Temperature sensors
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Summary: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.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2007.913335