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Numerical investigation of photonic crystal fiber sensor sensitivity based on evanescent wave absorption

We have carried out a detailed simulative study of the photonic band-gap crystal fiber sensor sensitivity by using the finite difference beam propagate method. The effect of the incident wavelength and the fill factor on the relative sensitivity of the sensors has been simulated. The simulative results show that with the incident wavelength and the fill factor increased, the relative sensitivity will be improved, the sensitivity of photonic band-gap crystal fiber sensor will be higher. The simulation results can provide the guidance for the further experimental study.