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TitleUnderstanding the fiber tip thermal runaway present in 3 µm fluoride glass fiber lasers.
Publication TypeJournal Article
Year of Publication2012
AuthorsCaron, Nicolas, Martin Bernier, Dominic Faucher, and Réal Vallée
JournalOpt Express
Volume20
Issue20
Pagination22188-94
Date Published2012 Sep 24
ISSN1094-4087
KeywordsComputer Simulation, Computer-Aided Design, Equipment Design, Equipment Failure Analysis, Fiber Optic Technology, Fluorides, Glass, Hot Temperature, Lasers, Models, Chemical, Thermal Conductivity
Abstract

When the tip of a fluoride glass fiber is exposed to ambient air, water vapor reacts with the glass constituents, increasing the OH contaminants at the surface. These OH impurities then diffuse inside the glass according to Fick's laws. Laser radiation at around 3 µm is strongly absorbed by the OH contaminants, causing local heating of the fiber tip resulting in an increase of the diffusion process which ultimately leads to fiber tip destruction. We accurately model this phenomenon by combining the diffusion theory with a basic thermal equation. Experimental measurements are in agreement with the model predictions for a good range of operating conditions.

DOI10.1364/OE.20.022188
Alternate JournalOpt Express
PubMed ID23037367