Fabrication and characterization of laser-ablated cladding resonances of two different-diameter photosensitive optical fibers

Islam, M.R. and Gunawardena, D.S. and Lee, Y.S. and Lim, Kok Sing and Yang, H.Z. and Ahmad, Harith (2016) Fabrication and characterization of laser-ablated cladding resonances of two different-diameter photosensitive optical fibers. Sensors and Actuators A: Physical, 243. pp. 111-116. ISSN 0924-4247

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Official URL: http://dx.doi.org/10.1016/j.sna.2016.03.025

Abstract

In this work, we demonstrate the inscription of grating in both cladding and core of photosensitive single-mode optical fibers with diameter 4.4/125 μm and 4.2/80 μm. Such inscription is made possible through a hydrogenation process for the photosensitive fiber and employ high energy focused pulsed laser from an ArF excimer laser. In the fabrication, a periodic ablation is formed on the fiber surface and the optical damage is extended from the fiber surface towards the core of the fiber, observable under an optical microscope. As a result, cladding modes are excited and cladding resonances are produced in the output spectra. The response of cladding resonances to ambient refractive index (RI) is characterized and investigated through simulation and experiment. It is observed that cladding resonances in the fiber with smaller diameter are more sensitive to the ambient RI variation.

Item Type: Article
Uncontrolled Keywords: Laser ablation; Laser-ablated clad grating; Cladding resonance; Refractive index sensing
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Dept of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 10 Oct 2017 05:12
Last Modified: 02 Jan 2019 03:09
URI: http://eprints.um.edu.my/id/eprint/17934

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