Coherent coupling of spectrally broadband laser channels

Anatoliy Khizhnyak; Vladimir Markov

doi:10.1117/12.918782

7 May 2012 Coherent coupling of spectrally broadband laser channels

Anatoliy Khizhnyak, Vladimir Markov

Proceedings Volume 8381, Laser Technology for Defense and Security VIII; 83810O (2012) https://doi.org/10.1117/12.918782
Event: SPIE Defense, Security, and Sensing, 2012, Baltimore, Maryland, United States

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.

Citation Download Citation

Anatoliy Khizhnyak and Vladimir Markov "Coherent coupling of spectrally broadband laser channels", Proc. SPIE 8381, Laser Technology for Defense and Security VIII, 83810O (7 May 2012); https://doi.org/10.1117/12.918782

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