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Journal Articles ACS photonics Year : 2023

Experimental Observation of the Spontaneous Emission of a Space–Time Wavepacket in a Multimode Optical Fiber

Abstract

We provide a complete analysis, from theory to experiment, of the spontaneous emergence of a discretized conical wave of X-type (i.e., a localized 2D+1 space-time wavepacket) when an intense ultrashort pulse nonlinearly propagates in a multimode fiber. In particular, we reveal that this spatiotemporal phenomenon corresponds to broadband intermodal dispersive wave emission from an unsteady localized wave structure formed during nonlinear propagation. Theoretical phase-matching predictions are experimentally and numerically confirmed in a commercially-available step-index multimode fiber. Our results provide a general understanding of phase-matched radiations emitted by nonlinear waves in multidimensional dispersive optical system.
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hal-04040414 , version 1 (22-03-2023)

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Karolina Stefańska, Pierre Béjot, Karol Tarnowski, Bertrand Kibler. Experimental Observation of the Spontaneous Emission of a Space–Time Wavepacket in a Multimode Optical Fiber. ACS photonics, 2023, 10 (3), pp.727-732. ⟨10.1021/acsphotonics.2c01863⟩. ⟨hal-04040414⟩
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