Phase-matching-induced near-chirp-free solitons in normal-dispersion fiber lasers
Loading...
Access rights
openAccess
publishedVersion
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Date
Major/Subject
Mcode
Degree programme
Language
en
Pages
Series
Light-Science & Applications, Volume 11, issue 1
Abstract
Direct generation of chirp-free solitons without external compression in normal-dispersion fiber lasers is a long-term challenge in ultrafast optics. We demonstrate near-chirp-free solitons with distinct spectral sidebands in normal-dispersion hybrid-structure fiber lasers containing a few meters of polarization-maintaining fiber. The bandwidth and duration of the typical mode-locked pulse are 0.74 nm and 1.95 ps, respectively, giving the time-bandwidth product of 0.41 and confirming the near-chirp-free property. Numerical results and theoretical analyses fully reproduce and interpret the experimental observations, and show that the fiber birefringence, normal-dispersion, and nonlinear effect follow a phase-matching principle, enabling the formation of the near-chirp-free soliton. Specifically, the phase-matching effect confines the spectrum broadened by self-phase modulation and the saturable absorption effect slims the pulse stretched by normal dispersion. Such pulse is termed as birefringence-managed soliton because its two orthogonal-polarized components propagate in an unsymmetrical “X” manner inside the polarization-maintaining fiber, partially compensating the group delay difference induced by the chromatic dispersion and resulting in the self-consistent evolution. The property and formation mechanism of birefringence-managed soliton fundamentally differ from other types of pulses in mode-locked fiber lasers, which will open new research branches in laser physics, soliton mathematics, and their related applications.Description
Funding Information: This work was funded by the National Key R&D Program of China under Grant No. 2017YFA0303800; the National Natural Science Foundation of China under Grant No. 11874300; 11634010; the Fundamental Research Funds for the Central Universities under Grant No. 3102019JC008, 3102019PY002; and the Natural Science Foundation of Shaanxi Province under Grant No. 2019JQ-447. Publisher Copyright: © 2022, The Author(s).
Keywords
Other note
Citation
Mao, D, He, Z, Zhang, Y, Du, Y, Zeng, C, Yun, L, Luo, Z, Li, T, Sun, Z & Zhao, J 2022, 'Phase-matching-induced near-chirp-free solitons in normal-dispersion fiber lasers', Light-Science & Applications, vol. 11, no. 1, 25. https://doi.org/10.1038/s41377-022-00713-y