Journal
JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume 40, Issue 24, Pages 7914-7921Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2022.3205846
Keywords
Fiber nonlinear optics; optical solitons; Raman scattering
Funding
- European Research Council through the European Union [874596, 740355, 101081871]
- Italian Ministry of University and Research [R18SPB8227]
- Sapienza University of Rome [RG12117A84DA7437, AR22117A7B01A2EB]
- European Research Council (ERC) [101081871] Funding Source: European Research Council (ERC)
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Optical solitons in multimode fibers have unique characteristics in terms of pulse duration and energy, which distinguishes them from solitons in single-mode fibers. This study proposes a theory for the Raman-induced soliton self-frequency shift in multimode fibers, and compares it with experimental data. The results show that specific values of pulsewidth and energy can lead to long-distance stability and better agreement with the theory of self-frequency shift, regardless of the input pulse duration. The Raman delay is affected by a jitter characterized by a Gaussian statistical distribution, with a stabilizing standard deviation for increasing pulse energies.
Optical solitons in multimode fibers exhibit complex dynamics, and peculiar characteristics in terms of pulse duration and energy, which distinguish them from their single-mode counterparts. We propose a theory for Raman-induced soliton self-frequency shift in multimode fibers, that is compared against experimental data of 1-km multimode soliton propagation. Specific values of pulsewidth and energy are found, at which solitons show long-distance stability and better correspondence with the theory of self-frequency shift; those values depend on the input wavelength, but are not related to the duration of the input pulse. Raman delay is affected by a jitter, characterized by a Gaussian statistical distribution, whose standard deviation tends to stabilize to a constant value for increasing pulse energies.
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