Demarcation energy properties of regenerated fiber Bragg grating sensors in few-mode fibers

Nazal, Nurul Asha Mohd and Lai, Man Hong and Lim, Kok Sing and Gunawardena, Dinusha Serandi and Chong, Wu Yi and Yang, Hang Zhou and Ahmad, Harith (2018) Demarcation energy properties of regenerated fiber Bragg grating sensors in few-mode fibers. Optica Applicata, 48 (2). pp. 263-271. ISSN 0078-5466

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Official URL: http://opticaapplicata.pwr.edu.pl/files/pdf/2018/n...

Abstract

In this work, thermal regeneration of fiber Bragg gratings inscribed in single-mode fibers, two-mode step index fibers and four-mode step index fibers is performed, where the single-mode fibers are used as the reference in the analysis. Specifically, we investigate the behavior of the thermal decay, recovery and eventually the permanent erasure of the gratings in the temperature range from 25 to 1300°C. In the domain of demarcation energy, the thermal responses of the gratings can be normalized and they share similar characteristic curves despite the different temperature ramping rates used in the annealing treatment. It is found that the demarcation energy at the regeneration point and the attempt-to-escape frequency for each grating can be associated with the confinement factors of the fibers. The finding in this work has provided a new insight in the manufacture of regenerated fiber Bragg grating sensors by using few-mode fibers for multiparameter sensing in high temperature environments.

Item Type: Article
Uncontrolled Keywords: Few-mode fibers; Regenerated fiber Bragg grating; Thermal decay; Thermal regeneration
Subjects: Q Science > Q Science (General)
Q Science > QC Physics
Divisions: Deputy Vice Chancellor (Research & Innovation) Office > Photonics Research Centre
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 08 May 2019 05:38
Last Modified: 08 May 2019 05:38
URI: http://eprints.um.edu.my/id/eprint/21157

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