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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 13, Iss. 17 — Aug. 22, 2005
  • pp: 6615–6625

The role of pump incoherence in continuous-wave supercontinuum generation

Frédérique Vanholsbeeck, Sonia Martin-Lopez, Miguel González-Herráez, and Stéphane Coen  »View Author Affiliations


Optics Express, Vol. 13, Issue 17, pp. 6615-6625 (2005)
http://dx.doi.org/10.1364/OPEX.13.006615


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Abstract

Supercontinuum generation can be achieved in the continuous-wave regime with a few watts of pump power launched into kilometer-long fibers. High power spectral density broadband light sources can be obtained in this way. Using a generalized nonlinear Schrödinger equation model and an ensemble averaging procedure that takes into account the partially-coherent nature of the pump laser, we fully explain for the first time the spectral broadening mechanisms underlying this process. Our simulations and experiments confirm that continuous-wave supercontinuum generation involve Raman soliton dynamics and dispersive waves in a way akin to pulsed supercontinua. The Raman solitons are however generated with a wide distribution of parameters because they originate from the random phase and intensity fluctuations associated with the pump incoherence. This soliton distribution is averaged out by experimental measurements, which explains the remarkable smoothness of experimental continuous-wave supercontinuum spectra.

© 2005 Optical Society of America

OCIS Codes
(060.2380) Fiber optics and optical communications : Fiber optics sources and detectors
(190.4370) Nonlinear optics : Nonlinear optics, fibers
(190.4380) Nonlinear optics : Nonlinear optics, four-wave mixing
(190.5650) Nonlinear optics : Raman effect

ToC Category:
Research Papers

History
Original Manuscript: July 6, 2005
Revised Manuscript: August 9, 2005
Published: August 22, 2005

Citation
Frédérique Vanholsbeeck, Sonia Martin-Lopez, Miguel González-Herráez, and Stéphane Coen, "The role of pump incoherence in continuous-wave supercontinuum generation," Opt. Express 13, 6615-6625 (2005)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-13-17-6615


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