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2-10 mu m Mid-Infrared Supercontinuum Generation in Cascaded Optical Fibers: Experiment and Modelling

Abstract : Supercontinuum (SC) generation towards the mid-infrared (MIR) range is an active field of research and development motivated by a wide range of applications including optical coherence tomography (OCT), material processing, optical sensing and absorption spectroscopy. In this work, we investigate mid-IR SC generation in a cascaded silica and soft-glass fiber system directly pumped with a commercially-available picosecond fiber laser operating in the telecommunications window at 1.55 mu m. This all-fiber system is shown to generate a flat broadband mid-IR-SC covering the entire range from 2 to 10 mu m with several tens of mW of output power. This technique paves the way for practical and robust broadband SC sources in the mid-IR without the requirement of mid-infrared pump sources or Thulium-doped fiber amplifiers. We also describe a fully-realistic numerical model used to simulate the nonlinear pulse propagation through the cascaded fiber system and use our numerical results to discuss the physical processes underlying the spectral broadening in the cascaded system.
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https://hal.archives-ouvertes.fr/hal-02957809
Contributor : Laurent Jonchère <>
Submitted on : Monday, October 5, 2020 - 2:00:47 PM
Last modification on : Wednesday, April 7, 2021 - 3:18:13 PM

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Sébastien Venck, Francois St-Hilaire, Laurent Brilland, Amar N. Ghosh, Radwan Chahal, et al.. 2-10 mu m Mid-Infrared Supercontinuum Generation in Cascaded Optical Fibers: Experiment and Modelling. Conference on Nonlinear Frequency Generation and Conversion - Materials and Devices XIX, Feb 2020, San Francisco, United States. ⟨10.1117/12.2543753⟩. ⟨hal-02957809⟩

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