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Performance comparison of high temperature sensor based on non‐adiabatic silica microfiber and single mode‐multimode‐single mode fiber structure
Author(s) -
Yusof Nur Hotimah,
Razak Hashim A.,
Arof Hamzah,
Harun Sulaiman W.
Publication year - 2019
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.31595
Subject(s) - microfiber , multi mode optical fiber , materials science , adiabatic process , fiber , optics , single mode optical fiber , temperature measurement , refractive index , linearity , optical fiber , fiber optic sensor , interference (communication) , graded index fiber , optoelectronics , sensitivity (control systems) , electronic engineering , telecommunications , composite material , physics , channel (broadcasting) , quantum mechanics , computer science , thermodynamics , engineering
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.