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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 7 — Apr. 2, 2007
  • pp: 3656–3664

Near-field intensity pattern at the output of silica-based graded-index multimode fibers under selective excitation with a single-mode fiber

C. P. Tsekrekos, R. W. Smink, B. P. de Hon, A. G. Tijhuis, and A. M. J. Koonen  »View Author Affiliations

Optics Express, Vol. 15, Issue 7, pp. 3656-3664 (2007)

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Selective excitation of graded-index multimode fibers (GI-MMFs) with a single-mode fiber (SMF) has gained increased interest for telecommunication applications. It has been proposed as a way to enhance the transmission bandwidth of GI-MMF links and/or create parallel communication channels over the same GI-MMF. Although the effect of SMF excitation on the transmission bandwidth has been investigated, its impact on the near-field intensity pattern at the output face of the GI-MMF has not been systematically addressed. We have carried out an analysis of the near-field intensity pattern at the output face of silica-based GI-MMFs excited by a radially offset SMF. Simulation results exhibit all of the features displayed by experimental ones. It turns out that differential mode attenuation and delay, full intra-group mode mixing, and small deviations in the refractive index profile of the GI-MMF do not affect the overall shape of the near-field intensity, which is determined by the radial offset of the input SMF. This can be exploited in mode group diversity multiplexing links. The effect of defects in the refractive index profile, such as a central dip or peak, is also examined.

© 2007 Optical Society of America

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.4230) Fiber optics and optical communications : Multiplexing
(350.5500) Other areas of optics : Propagation

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: January 24, 2007
Revised Manuscript: March 14, 2007
Manuscript Accepted: March 15, 2007
Published: April 2, 2007

C. P. Tsekrekos, R. W. Smink, B. P. de Hon, A. G. Tijhuis, and A. M. Koonen, "Near-field intensity pattern at the output of silica-based graded-index multimode fibers under selective excitation with a single-mode fiber," Opt. Express 15, 3656-3664 (2007)

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