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Proceedings Paper

A role of non-linearity in self-organization in fiber laser arrays
Author(s): A. P. Napartovich; N. N. Elkin; V. N. Troshchieva; D. V. Vysotsky
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Paper Abstract

Along with rapid progress in characteristics of single-fiber lasers much attention is paid these days to the problem of phase locking of multi-core fiber lasers. It is known that only strong-coupled system has a chance to be phase locked despite non-identity of channels. In case of the strong inter-channel coupling the traditional theoretical approach based on expansion over modes of individual cores fails. We have developed 3D diffraction numerical code, and results of its implementation to simulations of 7-core hexagonal fiber structure experimentally studied recently are reported. Detailed analysis of light propagation in this system, where self-organization effect was observed, shows that the dominant mechanism of coherence formation in an array of co-propagating beams is mode spatial filtering produced by the gain assembly. Non-linear resonance refraction exerts a weak influence on appearance of self-organization. The ways to achieve better selection of a single array mode are discussed. For the first time, the tolerance limits on micro-core parameters for keeping phase-locking are numerically found.

Paper Details

Date Published: 23 February 2006
PDF: 10 pages
Proc. SPIE 6102, Fiber Lasers III: Technology, Systems, and Applications, 61021W (23 February 2006); doi: 10.1117/12.645237
Show Author Affiliations
A. P. Napartovich, Troitsk Institute for Innovation and Fusion Research (Russia)
N. N. Elkin, Troitsk Institute for Innovation and Fusion Research (Russia)
V. N. Troshchieva, Troitsk Institute for Innovation and Fusion Research (Russia)
D. V. Vysotsky, Troitsk Institute for Innovation and Fusion Research (Russia)


Published in SPIE Proceedings Vol. 6102:
Fiber Lasers III: Technology, Systems, and Applications
Andrew J. W. Brown; Johan Nilsson; Donald J. Harter; Andreas Tünnermann, Editor(s)

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