Seeded intermodal four-wave mixing in a highly multimode fiber

Year: 2018

Authors: Bendahmane Abdelkrim; Krupa Katarzyna; Tonello Alessandro; Modotto Daniele; Sylvestre Thibaut; Couderc Vincent; Wabnitz Stefan; Millot Guy

Autors Affiliation: Université de Bourgogne Franche-Comté, ICB, UMR CNRS 6303, 9 Avenue A. Savary, 21078 Dijon, France; Università di Brescia, Dipartimento di Ingegneria dell’Informazione, via Branze 38, 25123 Brescia, Italy; Université de Limoges, XLIM, UMR CNRS 7252, 123 Avenue A. Thomas, 87060 Limoges, France; Université Bourgogne Franche-Comté, Institut FEMTO-ST, UMR CNRS 6174, 15B Avenue des Montboucons, 25030 Besançon, France

Abstract: We experimentally and theoretically investigate the process of seeded intermodal four-wave mixing in a graded-index multimode fiber, pumped in the normal dispersion regime. By using a fiber with a 100-μm core diameter, we generate a parametric sideband in the C-band (1530–1565 nm), hence allowing the use of an erbium-based laser to seed the mixing process. To limit nonlinear coupling between the pump and the seed to low-order fiber modes, the waist diameter of the pump beam is properly adjusted. We observe that the superimposed seed stimulates the generation of new spectral sidebands. A detailed characterization of the spectral and spatial properties of these sidebands shows good agreement with theoretical predictions from the phase-matching conditions. Interestingly, we demonstrate that both the second- and fourth-order dispersions must be included in the phase-matching conditions to get better agreement with experimental measurements. Furthermore, temporal measurements performed with a fast photodiode reveal the generation of multiple pulse structures.

Journal/Review: JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B: OPTICAL PHYSICS

Volume: 35 (2)      Pages from: 295  to: 301

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KeyWords: Dispersion (waves); Dispersions; Fibers; Multimode fibers; Phase matching, Erbium-based lasers; Fourth order dispersion; Graded-Index Multimode fibers; Nonlinear coupling; Phase matching conditions; Spatial properties; Spectral sidebands; Temporal measurements; Four wave mixing
DOI: 10.1364/JOSAB.35.000295

Citations: 21
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