4.6 Article

3D time-domain beam mapping for studying nonlinear dynamics in multimode optical fibers

期刊

OPTICS LETTERS
卷 46, 期 1, 页码 66-69

出版社

OPTICAL SOC AMER
DOI: 10.1364/OL.411868

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  1. Ministry of Education and Science of the Russian Federation [14.Y26.31.0017]
  2. Direction Generale de l'Armement (iXcore)
  3. Conseil Regional Aquitaine (F2MH, FLOWA, SI2P)
  4. Agence Nationale de la Recherche [ANR-10-LABX-0074-01, ANR-15-IDEX-0003, ANR-16-CE08-0031, ANR-18-CE080016-01]
  5. H2020 Marie Sklodowska-Curie Actions [713694]
  6. European Research Council [740355, 874596]
  7. Arianegroup (X-LAS)
  8. Marie Curie Actions (MSCA) [713694] Funding Source: Marie Curie Actions (MSCA)
  9. European Research Council (ERC) [874596] Funding Source: European Research Council (ERC)
  10. Agence Nationale de la Recherche (ANR) [ANR-16-CE08-0031] Funding Source: Agence Nationale de la Recherche (ANR)

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The study introduces a new space-time mapping technique for directly detecting the real-time evolution of beam intensity in graded index fibers and observes instant intrapulse nonlinear coupling processes among modes.
Characterization of the complex spatiotemporal dynamics of optical beam propagation in nonlinear multimode fibers requires the development of advanced measurement methods, capable of capturing the real-time evolution of beam images . We present a new space-time mapping technique, permitting the direct detection, with picosecond temporal resolution, of the intensity from repetitive laser pulses over a grid of spatial samples from a magnified image of the output beam. By using this time-resolved mapping, we provide, to the best of our knowledge, the first unambiguous experimental observation of instantaneous intrapulse nonlinear coupling processes among the modes of a graded index fiber. (C) 2020 Optical Society of America

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