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

Model of the self-Q-switching instability of passively phased fiber laser arrays
Model of the self-Q-switching instability of passively phased fiber laser arrays
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.
fiber lasers, passively phased fiber amplifier arrays, spatial filtering
0018-9197
777-785
Bochove, E.J.
d412b9b7-5f46-4da2-bb5c-74fe19d91215
Aceves, A.B.
59458d90-3c98-45f2-8f91-21886899d9fc
Braiman, Y.Y.
02ad0385-6c6d-44cf-af12-760f19d6ca84
Colet, P.R.
22838588-f9c4-4647-8f8b-c3c8041c79d9
Deiterding, R.
ce02244b-6651-47e3-8325-2c0a0c9c6314
Jacobo, A.
86098c30-489a-436b-b366-490f7ad94988
Miller, C.A.
2c21463c-efb1-475b-a21c-87907e1f5e84
Rhodes, C.
77cd6c37-4383-4df2-bd0a-04d5c31eeb8d
Shakir, S.A.
2902d931-e5b1-4bab-9e73-25709a4cdc50
Bochove, E.J.
d412b9b7-5f46-4da2-bb5c-74fe19d91215
Aceves, A.B.
59458d90-3c98-45f2-8f91-21886899d9fc
Braiman, Y.Y.
02ad0385-6c6d-44cf-af12-760f19d6ca84
Colet, P.R.
22838588-f9c4-4647-8f8b-c3c8041c79d9
Deiterding, R.
ce02244b-6651-47e3-8325-2c0a0c9c6314
Jacobo, A.
86098c30-489a-436b-b366-490f7ad94988
Miller, C.A.
2c21463c-efb1-475b-a21c-87907e1f5e84
Rhodes, C.
77cd6c37-4383-4df2-bd0a-04d5c31eeb8d
Shakir, S.A.
2902d931-e5b1-4bab-9e73-25709a4cdc50

Bochove, E.J., Aceves, A.B., Braiman, Y.Y., Colet, P.R., Deiterding, R., Jacobo, A., Miller, C.A., Rhodes, C. and Shakir, S.A. (2011) Model of the self-Q-switching instability of passively phased fiber laser arrays. IEEE Journal of Quantum Electronics, 47 (6), 777-785. (doi:10.1109/JQE.2011.2112637).

Record type: Article

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.

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More information

Published date: June 2011
Keywords: fiber lasers, passively phased fiber amplifier arrays, spatial filtering
Organisations: Aerodynamics & Flight Mechanics Group

Identifiers

Local EPrints ID: 380757
URI: https://eprints.soton.ac.uk/id/eprint/380757
ISSN: 0018-9197
PURE UUID: abb0194f-07ad-4ae2-b8b3-d10d5f745900
ORCID for R. Deiterding: ORCID iD orcid.org/0000-0003-4776-8183

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Date deposited: 09 Sep 2015 10:26
Last modified: 29 Aug 2019 00:32

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Contributors

Author: E.J. Bochove
Author: A.B. Aceves
Author: Y.Y. Braiman
Author: P.R. Colet
Author: R. Deiterding ORCID iD
Author: A. Jacobo
Author: C.A. Miller
Author: C. Rhodes
Author: S.A. Shakir

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