Breather molecular complexes in a passively mode-locked fiber laser


Breathing solitons are nonlinear waves in which the energy concentrates in a localized and oscillatory fashion. Similarly to stationary solitons, breathers in dissipative systems can form stable bound states displaying molecule-like dynamics, which are frequently called breather molecules. So far, the experimental observation of optical breather molecules and the real-time detection of their dynamics are limited to diatomic molecules, that is, bound states of only two breathers. In this work, the observation of different types of breather complexes in a mode-locked fiber laser: multibreather molecules, and molecular complexes originating from the binding of two breather-pair molecules or a breather pair molecule and a single breather is reported. The intermolecular temporal separation of the molecular complexes attains several hundreds of picoseconds, which is more than an order of magnitude larger than that of their stationary soliton counterparts and is a signature of long-range interactions. Numerical simulations of the laser model support the experimental findings. Moreover, nonequilibrium dynamics of breathing solitons are also observed, including breather collisions and annihilation. This work opens the possibility of studying the dynamics of many-body systems in which breathers are the elementary constituents.

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Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
College of Engineering & Physical Sciences
Additional Information: This is the peer reviewed version of the following article: Peng, J., Zhao, Z., Boscolo, S., Finot, C., Sugavanam, S., Churkin, D. V., Zeng, H., Breather Molecular Complexes in a Passively Mode-Locked Fiber Laser. Laser & Photonics Reviews 2021, 2000132, which has been published in final form at  This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving. Funding: National Key Research and Development Program. Grant Number: 2018YFB0407100 National Natural Science Foundation of China. Grant Numbers: 62022033, 12074122, 11621404, 11727812 Shanghai Education Commission. Grant Number: 2017-01-07-00-05-E00021 Science and Technology Innovation Program of Basic Science Foundation of Shanghai. Grant Number: 18JC1412000 Shanghai Rising-Star Program
Uncontrolled Keywords: breathers,mode locking,ultrafast fiber lasers,Electronic, Optical and Magnetic Materials,Atomic and Molecular Physics, and Optics,Condensed Matter Physics
Publication ISSN: 1863-8899
Last Modified: 14 May 2024 07:25
Date Deposited: 14 Jun 2021 12:44
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Related URLs: https://onlinel ... /lpor.202000132 (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2021-07
Published Online Date: 2021-06-09
Accepted Date: 2021-01-19
Authors: Peng, Junsong
Zhao, Zihan
Boscolo, Sonia (ORCID Profile 0000-0001-5388-2893)
Finot, Christophe
Sugavanam, Srikanth
Churkin, Dmitry
Zeng, Heping



Version: Accepted Version

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