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

Laurent Vaissie; Eric G. Johnson

doi:10.1117/1.1488607

1 August 2002 Selective mode excitation by non-axial evanescent coupling for bandwidth enhancement of multimode fiber links

Laurent Vaissie; Eric G. Johnson

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Optical Engineering, 41(8), (2002). doi:10.1117/1.1488607

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.

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Laurent Vaissie, Eric G. Johnson, "Selective mode excitation by non-axial evanescent coupling for bandwidth enhancement of multimode fiber links," Optical Engineering 41(8), (1 August 2002). https://doi.org/10.1117/1.1488607

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