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Proceedings Paper

Coherent coupling of spectrally broadband laser channels
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Paper Abstract

This paper discusses the experimental study and provides the analysis of an innovative approach to the passive-coherent combining of a spectrally-broadband laser channel array. Conventional coherent laser beam combining methods use a single-step technique based on phase-control of radiation in the combining channels with the goal of reducing the output beam to its diffraction limits. The novelty of our method is a two-stage approach in beam combining that enables (1) to couple multiple channels into a single beam with a stable mode structure, and (2) to convert this coupled beam in to a diffraction-limited state by using a stationary wavefront corrector. By using this method with the laser cavity in a stable configuration we effectively demonstrated our approach. This resulted in an efficient coupling of multiple channels by oscillating a single high-index Hermit-Gaussian mode. The cavity-based beam combining technique facilitates phase locking of multiple spectrally-broadband channels and therefore allows the suppression of nonlinear effects in individual fiber channels.

Paper Details

Date Published: 7 May 2012
PDF: 11 pages
Proc. SPIE 8381, Laser Technology for Defense and Security VIII, 83810O (7 May 2012); doi: 10.1117/12.918782
Show Author Affiliations
Anatoliy Khizhnyak, Advanced Systems & Technologies, Inc. (United States)
Vladimir Markov, Advanced Systems & Technologies, Inc. (United States)

Published in SPIE Proceedings Vol. 8381:
Laser Technology for Defense and Security VIII
Mark Dubinskii; Stephen G. Post, Editor(s)

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