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Optical Engineering

Selective mode excitation by non-axial evanescent coupling for bandwidth enhancement of multimode fiber links
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Paper Abstract

We present an analysis of conditioned launch in a gradient- index multimode fiber (MMF). Selective mode excitation is obtained by nonaxial evanescent coupling between two highly asymmetric side- polished fibers: a single-mode fiber and an MMF with an exposed core. An index-matching slab improves the coupling efficiency and selectivity. The simulation shows that about 40% of modes, only high-order modes, are excited in the MMF. When compared to an overfilled launch, the bandwidth of a perturbed index fiber is enhanced more than twofold for large parameter variations.

Paper Details

Date Published: 1 August 2002
PDF: 8 pages
Opt. Eng. 41(8) doi: 10.1117/1.1488607
Published in: Optical Engineering Volume 41, Issue 8
Show Author Affiliations
Laurent Vaissie, CREOL/Univ. of Central Florida (United States)
Eric G. Johnson, CREOL/Univ. of Central Florida (United States)


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