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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 35, Iss. 13 — Jul. 1, 2010
  • pp: 2149–2151

Modulation instability of a coherent–incoherent mixture

Dmitry V. Dylov and Jason W. Fleischer  »View Author Affiliations


Optics Letters, Vol. 35, Issue 13, pp. 2149-2151 (2010)
http://dx.doi.org/10.1364/OL.35.002149


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Abstract

We examine the nonlinear coupling and modulation instability of a coherent beam with one that is partially spatially incoherent. Using a mutual coherence approach, we derive the growth rate for perturbations and show that the presence of any amount of coherent component eliminates the nonlinear threshold for instability. The fraction of coherent light is shown to determine the gain and characteristic period of the resulting patterns. Theoretical considerations are confirmed by numerical simulation and by experimental observations in a self-focusing photorefractive crystal.

© 2010 Optical Society of America

OCIS Codes
(030.6600) Coherence and statistical optics : Statistical optics
(190.3100) Nonlinear optics : Instabilities and chaos
(190.4420) Nonlinear optics : Nonlinear optics, transverse effects in

ToC Category:
Nonlinear Optics

History
Original Manuscript: May 5, 2010
Manuscript Accepted: May 5, 2010
Published: June 18, 2010

Citation
Dmitry V. Dylov and Jason W. Fleischer, "Modulation instability of a coherent–incoherent mixture," Opt. Lett. 35, 2149-2151 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-13-2149


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