Abstract
A dual parametric sensor is proposed based on photonic crystal fiber (PCF) structure and surface plasmon resonance (SPR) effect in this paper. The proposed SPR-PCF sensor has a broadband spectral response from 1200 to 2400 nm. Detections of the alcohol with different concentrations and temperatures are carried out to demonstrate its dual parametric performance. When the concentration of the alcohol solution changes from 10 % to 87 %, the resonance-wavelength sensitivity is −1588.3 pm/% and the resonance-loss sensitivity is −0.34837 dB/%. While the external temperature is verified in a range of 20 °C and 80 °C, the resonance-wavelength and resonance-loss sensitivities are 2031.8 pm/°C and 0.473 dB/°C, respectively. Its R2 can always be larger than 0.99. Dual-parameter sensing can be realized via using the sensitivities as the coefficients to construct a transfer matrix. The proposed SPR-PCF sensor is expected to have potential applications in chemistry, biology, and environment monitoring.
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