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Open Access item Model of the self-Q-switching instability of passively phased fiber laser arrays

Authors:Bochove, Erik J
Colet, Pere
Jacobo, Adrián
Keywords:Fiber lasers, Passively phased fiber amplifier arrays, Spatial filtering
Issue Date:Jun-2011
Publisher:Institute of Electrical and Electronics Engineers
Citation:IEEE Journal of Quantum Electronics 47(6): 777 - 785 (2011)
Abstract:We present a simple model for self-pulsation instability in passively phased high power optical fiber amplifier arrays with external feedback. Its key features are, first, the feedback level's sensitivity, and thus that of the cavity Q-value, to small phase changes of the array fields, and, second, the effect of refractive index nonlinearity in the amplifiers. The model's prediction of an instability threshold for arrays of at least two amplifiers is confirmed by a linearized stability analysis of a system in ring-cavity geometry, and the magnitudes of predicted power levels are well within the domain of recent experiments.
Publisher version (URL):http://dx.doi.org/10.1109/JQE.2011.2112637
Appears in Collections:(IFISC) Artículos

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