PROJECT TITLE :

PCF-Cavity FBG Fabry-Perot Resonator for Simultaneous Measurement of Pressure and Temperature

ABSTRACT:

In this paper, we propose a Photonic Crystal Fiber (PCF)-cavity fiber Bragg grating (FBG) Fabry-Perot resonator for simultaneous sensing of temperature and pressure. The proposed device is built by splicing a one.five-mm long PCF section between 2 identical saturated FBGs written in SMF-28 forming an FBG-PCF-FBG configuration. Thus, a resonance DIP is made at intervals the Bragg reflection curve. Taking advantage of the difference in pressure sensitivities between the 2 sorts of fiber, the discriminative measurement of pressure and temperature will be achieved from the shifts of the resonance wavelength and band-edge wavelength. In addition, the identical temperature sensitivity of PCF and SMF-28 provides the convenience of eliminating the temperature variable and achieving temperature insensitive pressure measurement.


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