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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 26 — Dec. 24, 2007
  • pp: 17509–17519

An explanation of SRS beam cleanup in graded-index fibers and the absence of SRS beam cleanup in step-index fibers

Nathan B. Terry, Thomas G. Alley, and Timothy H. Russell  »View Author Affiliations

Optics Express, Vol. 15, Issue 26, pp. 17509-17519 (2007)

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Beam cleanup via stimulated Raman scattering in multimode fibers is modeled by numerically considering the competition between the Stokes modes of graded-index and step-index fibers. The relative gain of each Stokes mode is calculated by considering the overlap the various pump and Stokes modes of the fibers. Mode competition in a graded-index fiber favors the LP01 Stokes mode while mode competition in a step-index fiber does not favor the LP01 Stokes mode. This model explains why beam cleanup has only been reported for graded-index fibers and not for step-index fibers.

© 2007 Optical Society of America

OCIS Codes
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(190.4370) Nonlinear optics : Nonlinear optics, fibers
(290.5910) Scattering : Scattering, stimulated Raman

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: October 15, 2007
Revised Manuscript: December 3, 2007
Manuscript Accepted: December 3, 2007
Published: December 11, 2007

Nathan B. Terry, Thomas G. Alley, and Timothy H. Russell, "An explanation of SRS beam cleanup in graded-index fibers and the absence of SRS beam cleanup in step-index fibers," Opt. Express 15, 17509-17519 (2007)

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