期刊
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
卷 35, 期 2, 页码 295-301出版社
OPTICAL SOC AMER
DOI: 10.1364/JOSAB.35.000295
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资金
- iXcore Research Foundation
- Labex ACTION program [ANR-11-LABX-0001-01]
- Ministero dell'Istruzione, dell'Universita e della Ricerca (MIUR) [PRIN 2015KEZNYM]
- Horiba Medical and BPI France (Dat@diag project)
- H European Research Council (ERC) [740355]
- H Marie Sklodowska-Curie Actions (MSCA) [GA-2015-713694]
- European Research Council (ERC) [740355] Funding Source: European Research Council (ERC)
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-mu m 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. (C) 2018 Optical Society of America
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