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Proceedings Paper

Phase dynamics of high radiance fiber laser arrays with active phase control
Author(s): Erik Bochove; Brendan Neschke; Niketh Nair; Paul Delgado; Yehuda Braiman
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Paper Abstract

The existing model of the LOCSET technique for the active phase synchronization of fiber laser arrays (T. Shay, Opt. Express, 2006) is extended to include relevant physical properties of the system, such as inherent optical path differences (OPD), line-width and group velocity dispersion (GVD), and we also include phase “jitter” of the master oscillator’s output in the model, which in experiments is implemented to induce spectral broadening for suppression of nonlinear frequency conversion. Linearization of the phase error signal, which incorrectly predicts convergence to a synchronous equilibrium state, is not performed. Instead, the closed-loop control dynamics are shown to be described by differential equations of Kuramoto type when phase corrector response dynamics are negligible. Linear stability analysis indicates that there is always one and no more than one dynamically stable state. The latter is shown to be normally synchronous, except when strong “jitter” is applied. A Liapounov function is found as subject to the validity of certain symmetry conditions.

Paper Details

Date Published: 3 March 2015
PDF: 15 pages
Proc. SPIE 9343, Laser Resonators, Microresonators, and Beam Control XVII, 93431C (3 March 2015); doi: 10.1117/12.2080538
Show Author Affiliations
Erik Bochove, Air Force Research Lab. (United States)
Brendan Neschke, Univ. of Tennessee (United States)
Oak Ridge National Lab. (United States)
Niketh Nair, Univ. of Tennessee (United States)
Oak Ridge National Lab. (United States)
LEIDOS (United States)
Paul Delgado, Univ. of Texas at El Paso (United States)
LEIDOS (United States)
Yehuda Braiman, Univ. of Tennessee (United States)
Oak Ridge National Lab. (United States)


Published in SPIE Proceedings Vol. 9343:
Laser Resonators, Microresonators, and Beam Control XVII
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko; Lutz Aschke; Kunihiko Washio, Editor(s)

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