Dual-parameter detection with an open-loop dual-core plasmonic optical fiber sensor

Abstract

The present article proposes an open-loop dual-core plasmonic optical fiber sensor for dual-parameter detection. For the first time, a graphene-TiO2-gold composite structure was used in an open-loop channel of D-type, and a two-parameter detection was produced using a PDMS-Au temperature sensing channel. The sensing mechanism is based on the surface plasmon resonance (SPR) interaction between the photonic crystal fiber core and the metal layer. The analytical approach is complete vector finite element analysis. The coupling loss, resonant peak, sensitivity, and other performance factors are analyzed. According to analogy and simulation analysis, the sensor has a maximum wavelength sensitivity of 27794.37 nm / RIU when the refractive index of the measured area is 1.31∼1.42, and maximum temperature sensitivity of 10.50 nm /°C in the range of 10 °C to 40 °C.