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Proceedings Paper

Intracavity fiber array beam combining
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Paper Abstract

In this paper we present results of an analysis of a method of effectively combining the output of a fiber array into a single beam by using a laser cavity in stable configuration. To couple the individual channels, our approach uses the nature of the high index modes with their spatial pattern resembling a combination of the sub-beams. The structure of such modes allows for very efficient matching (up to 97%) of the individual channels of the fiber array to an intra-cavity field distribution. As the high index mode has a spherical wavefront with π-phase shift between the nearest sub-beams this allows use of a simple phase corrector to form a diffraction limited output beam. In the configuration under analysis, the intra-cavity power per individual channel of the array is low enough to avoid damaging the fiber while the total output power is the sum of the power of all the channels. This paper describes the characteristics of the proposed fiber array beam coupling, in particular, the selection and stabilization of the chosen operating mode without losses in oscillation efficiency.

Paper Details

Date Published: 22 April 2005
PDF: 9 pages
Proc. SPIE 5709, Fiber Lasers II: Technology, Systems, and Applications, (22 April 2005); doi: 10.1117/12.589426
Show Author Affiliations
Anatoliy Khizhnyak, MetroLaser, Inc. (United States)
Vladimir Markov, MetroLaser, Inc. (United States)

Published in SPIE Proceedings Vol. 5709:
Fiber Lasers II: Technology, Systems, and Applications
L. N. Durvasula; Andrew J. W. Brown; Johan Nilsson, Editor(s)

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