Spatiotemporal mode decomposition of ultrashort pulses in linear and nonlinear graded-index multimode fibers

Year: 2023

Authors: Zitelli M., Couderc V., Ferraro M., Mangini F., Parra-Rivas P., Sun YF., Wabnitz S.

Autors Affiliation: Univ Roma Sapienza, Dept Informat Engn Elect & Telecommun, I-00184 Rome, Italy; Univ Limoges, XLIM, UMR CNRS 7252, F-87060 Limoges, France; Ist Nazl Ottica, CNR INO, I-80078 Pozzuoli, Italy.

Abstract: We develop a spatiotemporal mode decomposition technique to study the spatial , temporal mode power distribution of ultrashort pulses in long spans of graded-index multimode fiber, for different input laser con-ditions. We find that the beam mode power content in the dispersive pulse propagation regime can be described by the Bose-Einstein law, as a result of the process of power diffusion from linear and nonlinear mode coupling among nondegenerate mode groups. In the soliton regime, the output mode power distribution approaches the Rayleigh-Jeans law.(c) 2023 Chinese Laser Press

Journal/Review: PHOTONICS RESEARCH

Volume: 11 (5)      Pages from: 750  to: 756

More Information: HORIZON EUROPE European Research Council (101081871, 740355); H2020 Marie Sklodowska-Curie Actions (101023717, 101064614); Ministero dell’Istruzione, dell’Universita e della Ricerca (R18SPB8227); Sapienza University of Rome (SP12218480C7D1E9).
KeyWords: Self-phase Modulation; Enhancement; Beams
DOI: 10.1364/PRJ.484271

Citations: 6
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