Performance comparison of high temperature sensor based on non‐adiabatic silica microfiber and single mode‐multimode‐single mode fiber structure
Document Type
Article
Publication Date
1-1-2019
Abstract
A fiber-based temperature sensor operating at high temperature was demonstrated using multimode interference effect and its performance was compared with that of two different probes based on a non-adiabatic microfiber and singlemode-multimode-singlemode (SMS) fiber structure. Interference fringes of the output red-shifted as the temperature increased due to the change in the effective refractive index of the multiple modes inside both structures. The sensor probes were able to measure the temperature variation up to 400°C with a linearity of more than 90%. The temperature sensitivity of the microfiber and SMS sensors is 6.0 pm/°C and 11.1 pm/°C, respectively. Our proposed sensors are simple, relatively cheap to be fabricated, and could operate at high temperatures above 300°C.
Keywords
Fiber-optic sensor, high temperature sensor, Interference filter
Divisions
fac_eng
Funders
University of Malaya (Grant No. FG006-17AFR)
Publication Title
Microwave and Optical Technology Letters
Volume
61
Issue
2
Publisher
John Wiley & Sons