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Title: Vectorial nature in nonlinear multimode interference based ultrafast fiber lasers
Authors: Xia, Ran
Luo, Yiyang
Shum, Perry Ping
Xiang, Yang
Ni, Wenjun
Liu, Yusong
Lam, Huy Quoc
Tang, Dingyuan
Tang, Xiahui
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2020
Source: Xia, R., Luo, Y., Shum, P. P., Xiang, Y., Ni, W., Liu, Y., Lam, H. Q., Tang, D. & Tang, X. (2020). Vectorial nature in nonlinear multimode interference based ultrafast fiber lasers. IEEE Photonics Journal, 12(2).
Project: NRF-CRP-18-2017-02
Journal: IEEE Photonics Journal
Abstract: Recent research on nonlinear multimode interference (NL-MMI) based mode-locking method provides a new approach for ultrafast all-fiber lasers. Here, we report on the polarization dynamics of group velocity locked vector solitons (GVLVSs) and noise-like vector pulses (NLVPs) in a graded-index multimode fiber (GIMF) based all-fiber laser. Due to the non-polarization sensitive characteristic of the NL-MMI, emitted pulses automatically evolve into the vector multi-pulse complexes constituting two orthogonally polarized components. Beyond the traditional polarization resolved measurement, dispersive Fourier transform (DFT) and polarization beam splitting techniques are jointly adopted to enable insights into the transient polarization dynamics of the vector solitons. It is found in real time that the two orthogonally polarized components oppositely shift their central wavelengths to compensate the polarization dispersion. In addition, stationary and pulsating NLVPs are respectively unfolded by the DFT based polarization resolved measurement. Especially, the pulsating NLVPs before and after polarization resolved measurement are accompanied with the identical periodic spectral breathing process. All these findings reveal the vectorial nature in NL-MMI based ultrafast fiber lasers, as well as highlight the transient polarization dynamics and the long-term pulsation in dissipative systems.
ISSN: 1943-0655
DOI: 10.1109/JPHOT.2020.2974880
Rights: © 2020 IEEE. This journal is 100% open access, which means that all content is freely available without charge to users or their institutions. All articles accepted after 12 June 2019 are published under a CC BY 4.0 license, and the author retains copyright. Users are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles, or use them for any other lawful purpose, as long as proper attribution is given.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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