Intracavity fiber array beam combining

Anatoliy Khizhnyak; Vladimir Markov

doi:10.1117/12.589426

22 April 2005 Intracavity fiber array beam combining

Anatoliy Khizhnyak, Vladimir Markov

Proceedings Volume 5709, Fiber Lasers II: Technology, Systems, and Applications; (2005) https://doi.org/10.1117/12.589426
Event: Lasers and Applications in Science and Engineering, 2005, San Jose, California, United States

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.

Citation Download Citation

Anatoliy Khizhnyak and Vladimir Markov "Intracavity fiber array beam combining", Proc. SPIE 5709, Fiber Lasers II: Technology, Systems, and Applications, (22 April 2005); https://doi.org/10.1117/12.589426

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