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Proceedings Paper

Thermal effects in high-power CW fiber lasers
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Paper Abstract

The thermal degradation of double clad optical fiber coatings is known to be the prime limiting factor for the operation of high power CW fiber lasers. In this paper, we conduct a study of thermal effects in high power CW fiber lasers. A particular focus is put on heating at the splice points and in the doped fiber due to the quantum defect in 100-W class CW fiber lasers. A theoretical model and experimental measurements taken with a high resolution IR camera on 125 to 400 μm diameter fibers are presented. Thermal contact resistance between the fiber and its heat sink are considered in the conduction heat transfer model and measured for different geometries. Proper designs for cooling apparatus are proposed and optimization of the active fiber is discussed. Some predictions for power scaling and temperature management of fiber lasers to kW power level are also described.

Paper Details

Date Published: 19 February 2009
PDF: 11 pages
Proc. SPIE 7195, Fiber Lasers VI: Technology, Systems, and Applications, 71951U (19 February 2009); doi: 10.1117/12.809021
Show Author Affiliations
Marc-André Lapointe, CorActive High-Tech Inc. (Canada)
Stephane Chatigny, CorActive High-Tech Inc. (Canada)
Michel Piché, CorActive High-Tech Inc. (Canada)
Michael Cain-Skaff, CorActive High-Tech Inc. (Canada)
Jean-Noël Maran, CorActive High-Tech Inc. (Canada)

Published in SPIE Proceedings Vol. 7195:
Fiber Lasers VI: Technology, Systems, and Applications
Denis V. Gapontsev; Dahv A. Kliner; Jay W. Dawson; Kanishka Tankala, Editor(s)

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