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Review of long period fiber gratings written by CO2 laser

Review of long period fiber gratings written by CO2 laser
Review of long period fiber gratings written by CO2 laser
This paper presents a systematic review of long period fiber gratings (LPFGs) written by the CO2 laser irradiation technique. First, various fabrication techniques based on CO2 laser irradiations are demonstrated to write LPFGs in different types of optical fibers such as conventional glass fibers, solid-core photonic crystal fibers, and air-core photonic bandgap fibers. Second, possible mechanisms, e.g., residual stress relaxation, glass structure changes, and physical deformation, of refractive index modulations in the CO2-laser-induced LPFGs are analyzed. Third, asymmetrical mode coupling, resulting from single-side laser irradiation, is discussed to understand unique optical properties of the CO2-laser-induced LPFGs. Fourthly, several pretreament and post-treatment techniques are proposed to enhance the efficiency of grating fabrications. Fifthly, sensing applications of the CO2-laser-induced LPFGs are investigated to develop various LPFG-based temperature, strain, bend, torsion, pressure, and biochemical sensors. Finally, communication applications of the CO2-laser-induced LPFGs are investigated to develop various LPFG-based band-rejection filters, gain equalizers, polarizers, and couplers.
0021-8979
081101-[18pp]
Wang, Yiping
eb70c678-a121-4fc4-b9a0-120a20f3b109
Wang, Yiping
eb70c678-a121-4fc4-b9a0-120a20f3b109

Wang, Yiping (2010) Review of long period fiber gratings written by CO2 laser. Journal of Applied Physics, 108 (8), 081101-[18pp]. (doi:10.1063/1.3493111).

Record type: Article

Abstract

This paper presents a systematic review of long period fiber gratings (LPFGs) written by the CO2 laser irradiation technique. First, various fabrication techniques based on CO2 laser irradiations are demonstrated to write LPFGs in different types of optical fibers such as conventional glass fibers, solid-core photonic crystal fibers, and air-core photonic bandgap fibers. Second, possible mechanisms, e.g., residual stress relaxation, glass structure changes, and physical deformation, of refractive index modulations in the CO2-laser-induced LPFGs are analyzed. Third, asymmetrical mode coupling, resulting from single-side laser irradiation, is discussed to understand unique optical properties of the CO2-laser-induced LPFGs. Fourthly, several pretreament and post-treatment techniques are proposed to enhance the efficiency of grating fabrications. Fifthly, sensing applications of the CO2-laser-induced LPFGs are investigated to develop various LPFG-based temperature, strain, bend, torsion, pressure, and biochemical sensors. Finally, communication applications of the CO2-laser-induced LPFGs are investigated to develop various LPFG-based band-rejection filters, gain equalizers, polarizers, and couplers.

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Published date: October 2010

Identifiers

Local EPrints ID: 177007
URI: https://eprints.soton.ac.uk/id/eprint/177007
ISSN: 0021-8979
PURE UUID: 0bf9729f-1377-4fe5-8a1d-c78876ab936b

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Date deposited: 14 Mar 2011 09:00
Last modified: 09 Sep 2019 19:00

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