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

AuthorsBochove, Erik J; Colet, Pere ; Colet, Pere ; Jacobo, Adrián
KeywordsFiber lasers
Passively phased fiber amplifier arrays
Spatial filtering
Issue DateJun-2011
PublisherInstitute of Electrical and Electronics Engineers
CitationIEEE Journal of Quantum Electronics 47(6): 777 - 785 (2011)
AbstractWe 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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