Numerical and Experimental Study on Temperature Measurement Performance of SNS Fiber Optic Sensor with Liquid-Sealed
Optical Fiber Technology（2022）SCI 3区
Abstract
Single-mode-no-core-single-mode (SNS) optical fiber structures have valuable potential to encapsulate as high-precision temperature sensors, due to their great sensitivity. This paper is to improve the temperature sensitivity of SNS fibers by studying the parameters of fiber length, diameter, and refractive index of the seal liquid. Transmission spectra of the fibers are given in both aspects of experiment and numerical simulation. We find that using a slim no-core fiber section sealed with liquid of high refractive index can effectively improve the sensitivity, while the choice of fiber length mainly affects the width of transmission peak. The results may contribute to the development of high-sensitivity optic temperature sensor.
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Key words
Fiber optic sensor,Temperature sensor,High sensitivity,Multi-mode interference
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