Photonics Research, 2020, 8 (10): 10001580, Published Online: Sep. 18, 2020  

Extraction of internal phase motions in femtosecond soliton molecules using an orbital-angular-momentum-resolved method Download: 530次

Yuwei Zhao 1†Jintao Fan 2,3†Youjian Song 1,5,*Uwe Morgner 2,3,4Minglie Hu 1,6,*
Author Affiliations
1 Ultrafast Laser Laboratory, Key Laboratory of Opto-electronic Information Science and Technology of Ministry of Education, School of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China
2 Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover, Germany
3 Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering-Innovation Across Disciplines), 30167 Hannover, Germany
4 Laser Zentrum Hannover e.V., Hollerithallee 8, 30419 Hannover, Germany
5 e-mail: yjsong@tju.edu.cn
6 e-mail: huminglie@tju.edu.cn
Abstract
Internal motions in femtosecond soliton molecules provide insight into universal collective dynamics in various nonlinear systems. Here we introduce an orbital-angular-momentum (OAM)-resolved method that maps the relative phase motion within a femtosecond soliton molecule into the rotational movement of the interferometric beam profile of two optical vortices. By this means, long-term relative phase evolutions of doublet and triplet soliton molecules generated in an all-polarization-maintaining mode-locked Er-fiber laser are revealed. This simple and practical OAM-resolved method represents a promising way to directly visualize the complex phase dynamics in a diversity of multisoliton structures.

Yuwei Zhao, Jintao Fan, Youjian Song, Uwe Morgner, Minglie Hu. Extraction of internal phase motions in femtosecond soliton molecules using an orbital-angular-momentum-resolved method[J]. Photonics Research, 2020, 8(10): 10001580.

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