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Communication

Spatiotemporal Evolutions of Similariton Pulses in Multimode Fibers with Raman Amplification

by 1,2 and 2,*
1
Telecommunications Laboratory, 8 Mai 1945—Guelma University, Guelma 24000, Algeria
2
National Nanotechnology Research Center and Institute of Materials Science and Nanotechnology, Bilkent University, Ankara 06800, Turkey
*
Author to whom correspondence should be addressed.
Photonics 2021, 8(9), 354; https://doi.org/10.3390/photonics8090354
Received: 2 July 2021 / Revised: 17 August 2021 / Accepted: 23 August 2021 / Published: 27 August 2021
(This article belongs to the Special Issue Fiber Lasers)
This paper aims to pave the way towards the demonstration of spatiotemporal similariton pulses’ evolution in passive multimode fibers with Raman amplification. We numerically present this issue in graded-index and step-index multimode fibers and provide a first look at the complex spatiotemporal dynamics of similariton pulses. The results showed that the similariton pulses could be generated in both multimode fibers. The temporal and spectral evolution of the pulses can be characterized as parabolic shapes with linear chirp and kW peak power. By compressing these, high-energy femtoseconds pulses can be obtained, starting initial picosecond pulses. A spatial beam profile could be preserved in both multimode fibers with the most energy coupled to the fundamental mode. Specifically, the similariton pulses’ generation with Raman amplification in a graded-index multimode fiber improves the spatial beam self-cleaning process under the different initial modes’ excitation. The observation of a new beam self-cleaning process is another attractor feature of propagation in graded-index multimode fibers. View Full-Text
Keywords: spatiotemporal similariton; Raman amplification; multimode fibers spatiotemporal similariton; Raman amplification; multimode fibers
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MDPI and ACS Style

Graini, L.; Ortaç, B. Spatiotemporal Evolutions of Similariton Pulses in Multimode Fibers with Raman Amplification. Photonics 2021, 8, 354. https://doi.org/10.3390/photonics8090354

AMA Style

Graini L, Ortaç B. Spatiotemporal Evolutions of Similariton Pulses in Multimode Fibers with Raman Amplification. Photonics. 2021; 8(9):354. https://doi.org/10.3390/photonics8090354

Chicago/Turabian Style

Graini, Leila, and Bülend Ortaç. 2021. "Spatiotemporal Evolutions of Similariton Pulses in Multimode Fibers with Raman Amplification" Photonics 8, no. 9: 354. https://doi.org/10.3390/photonics8090354

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