Silicone Rubber Coated Non-Adiabatic Tapered Fiber Combined With Online Vernier Interferometer for Temperature Detection

A simple, robust, compact, and highly sensitive temperature sensor based on silicone rubber-sealed non-adiabatic tapered fiber (SR-NATF) is proposed and demonstrated. By combining with the fast Fourier transform (FFT) method, an online Vernier reference interferometer (OVRI) is constructed to enhance the temperature sensitivity. The temperature sensitivity is -1.30 nm/degrees C for the single SR-NATF in the temperature range of 35 degrees C - 40 degrees C. After utilizing the FFT method and cascading an OVRI, the temperature sensitivity can obtain 6.26 nm/degrees C, which is 4.82 times as that of a single SR-NATF. The proposed sensor is robust, soft and easy-fabrication which can be applied in human body temperature detection. In addition, the proposed method is efficient and convenient for the construction of an online reference arm based on Vernier-amplified sensitivity.

Automated summary

This paper proposes and demonstrates a simple, robust, compact, and highly sensitive temperature sensor based on silicone rubber-sealed non-adiabatic tapered fiber. By combining with the fast Fourier transform method, an online Vernier reference interferometer is constructed to enhance the temperature sensitivity. The proposed sensor is efficient and convenient for human body temperature detection.