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Proceedings Paper

High power performance limits of fiber components
Author(s): Nigel Holehouse; Julien Magné; Mathieu Auger
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Paper Abstract

High power combiners are essential for practical fiber lasers, recent developments in pump technology has increased the available brightness and power of pumps significantly, enabling multi kW lasers and pushing combiner designs to new limits. I will present the challenges, measurements and some solutions to these issues. Traditional calculations for combiners underestimate the issues associated with the ‘tails’ of the pump NA distribution, losses in fully filled combiners increase rapidly as pump NA blooms, and subsequent heating effects dominate the combiner’s power handling. Acrylate coated pump fibers are reaching their limits and devices and measurements on double clad pump combiners with losses <0.05dB, will be presented enabling multi kW operation, The use of triple clad fibers in the gain section will discussed as a solution for multi kW applications. Results on ultra-low background loss FBG’s will be presented, along with developed measurement techniques.

Paper Details

Date Published: 4 March 2015
PDF: 6 pages
Proc. SPIE 9344, Fiber Lasers XII: Technology, Systems, and Applications, 93441F (4 March 2015); doi: 10.1117/12.2086855
Show Author Affiliations
Nigel Holehouse, ITF Labs. (Canada)
Julien Magné, ITF Labs. (Canada)
Mathieu Auger, ITF Labs. (Canada)

Published in SPIE Proceedings Vol. 9344:
Fiber Lasers XII: Technology, Systems, and Applications
L. Brandon Shaw, Editor(s)

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