4.6 Article

Intermodal modulational instability in graded-index multimode optical fibers

Journal

OPTICS LETTERS
Volume 42, Issue 17, Pages 3419-3422

Publisher

OPTICAL SOC AMER
DOI: 10.1364/OL.42.003419

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Funding

  1. iXcore Research Foundation
  2. Ministero dell'Istruzione, dell'Universita e della Ricerca (MIUR) [PRIN 2015KEZNYM]
  3. Agence Nationale de la Recherche (ANR) (Labex Action)
  4. Ministry of Education and Science of the Russian Federation (Minobrnauka) [14.Y26.31.0017]
  5. Horiba Medical
  6. BPI France

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We report on the experimental observation of an intermodal noise-seeded modulational instability process (MI) taking place in the normal dispersion regime of a few-mode gradedindex optical fiber. Strong power dependence of the MI spectra is observed, with a peak gain modulation frequency that scales as the square root of the injected light power. These observations are in excellent agreement with the predictions of a bimodal-MI model. (C) 2017 Optical Society of America

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