Miniature Fabry-Perot interferometric sensor for temperature measurement based on photonic crystal fiber

Abstract

A novel miniature Fabry-Perot interferometric (FPI) temperature sensor is proposed and demonstrated experimentally. The modal interferometer is fabricated by just splicing a section of photonic crystal fiber (PCF) with a single-mode fiber (SMF). The air holes of the PCF are fully collapsed by the discharge arc during the splicing procedure to enhance the reflection coefficient of the splicing point. The transmission spectra with different temperatures are measured, and the experimental results show that the linear response of 11.12 pm/°C in the range of 30–80 °C is obtained. This sensor has potential applications in temperature measurement field.

Keywords

Fiber Bragg Grating / Photonic Crystal Fiber / Amplify Spontaneous Emission / Optical Path Difference / Optic Letter

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