Journal
OPTICS EXPRESS
Volume 20, Issue 13, Pages 14054-14063Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.20.014054
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Funding
- Natural Scientific Foundation of China [51075037]
- Defense Equipments Foundation of China [9140A05060411BQ0115]
- Aeronautics Key Foundation of China [20110343004]
- Doctoral Foundation of Education Ministry of China [20101101110014]
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A novel distributed fiber optic pressure sensor based on an all-solid photonic band gap fiber is proposed and experimentally demonstrated. The sensor is fabricated by splicing a piece of the photonic crystal fiber (PCF) with a single-mode fiber (SMF), and the free end face of the PCF is filmed with a reflectivity of 99%. The cladding mode is excited at the fiber splice, resulting in the interference between the cladding mode and the core mode. The pressure position can be located by measuring the phase difference of the interferometer, and the pressure can be interrogated by measuring the height of the valley in the white-light optical spectrum. The experimental results show that the pressure and its position along the PCF can be simultaneously interrogated. (C) 2012 Optical Society of America
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