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Zhu QB, Zhang ZX, Tong LY, Li TJ, Geng MM, Xu WC, Zhang ZR, Luo ZC. Auto-setting multi-soliton temporal spacing in a fiber laser by a hybrid GA-PSO algorithm. OPTICS EXPRESS 2023; 31:40498-40507. [PMID: 38041349 DOI: 10.1364/oe.502123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 10/30/2023] [Indexed: 12/03/2023]
Abstract
Multi-soliton operation in fiber lasers is a promising platform for the investigation of soliton interaction dynamics and high repetition-rate pulse. However, owing to the complex interaction process, precisely manipulating the temporal spacing of multiple solitons in a fiber laser is still challenging. Herein, we propose an automatic way to control the temporal spacing of multi-soliton operation in an ultrafast fiber laser by a hybrid genetic algorithm-particle swarm optimization (GA-PSO) algorithm. Relying on the intelligent adjustment of the electronic polarization controller (EPC), the on-demand temporal spacing of the double solitons can be effectively achieved. In particular, the harmonic mode locking with equal temporal spacing of double solitons is also obtained. Our approach provides a promising way to explore nonlinear soliton dynamics in optical systems and optimize the performance of ultrafast fiber lasers.
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Xia R, Liu Y, Huang S, Luo Y, Sun Q, Tang X, Xu G. Investigations on diverse dynamics of soliton triplets in mode-locked fiber lasers. OPTICS EXPRESS 2023; 31:22710-22721. [PMID: 37475375 DOI: 10.1364/oe.493250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 06/11/2023] [Indexed: 07/22/2023]
Abstract
Optical soliton molecules exhibiting behaviors analogous to matter molecules have been the hotspot in the dissipative system for decades. Based on the dispersion Fourier transformation technique, the real-time spectral interferometry has become the popular method to reveal the internal dynamics of soliton molecules. The rising degrees of freedom in pace with the increased constitutes of soliton molecules yield more intriguing sights into the internal motions. Yet the soliton molecules with three or more pulses are rarely investigated owing to the exponentially growing complexity. Here, we present both experimental and theoretical studies on the soliton molecules containing three solitons. Different assemblies of the constitutes are categorized as different types of soliton triplet akin to the geometric isomer, including equally-spaced triplet and unequally-spaced triplet. Typical soliton triplets with different dynamics including regular internal motions, hybrid phase dynamics and complex dynamics involving separation evolution are experimentally analyzed and theoretically simulated. Specifically, the energy difference which remains elusive in experiments are uncovered through the simulation of diverse triplets with plentiful dynamics. Moreover, the multi-dimensional interaction space is proposed to visualize the internal motions in connection with the energy exchange, which play significant roles in the interplays among the solitons. Both the experimental and numerical simulations on the isomeric soliton triplets would release a larger number of degrees of freedom and motivate the potentially artificial configuration of soliton molecules for various ultrafast applications, such as all-optical buffering and multiple encoding for telecommunications.
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Liu Y, Huang S, Li Z, Liu H, Sun Y, Xia R, Yan L, Luo Y, Liu H, Xu G, Sun Q, Tang X, Shum PP. Phase-tailored assembly and encoding of dissipative soliton molecules. LIGHT, SCIENCE & APPLICATIONS 2023; 12:123. [PMID: 37198185 DOI: 10.1038/s41377-023-01170-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 04/25/2023] [Accepted: 04/25/2023] [Indexed: 05/19/2023]
Abstract
Self-assembly of particle-like dissipative solitons, in the presence of mutual interactions, emphasizes the vibrant concept of soliton molecules in varieties of laser resonators. Controllable manipulation of the molecular patterns, held by the degrees of freedom of internal motions, still remains challenging to explore more efficient and subtle tailoring approaches for the increasing demands. Here, we report a new phase-tailored quaternary encoding format based on the controllable internal assembly of dissipative soliton molecules. Artificial manipulation of the energy exchange of soliton-molecular elements stimulates the deterministic harnessing of the assemblies of internal dynamics. Self-assembled soliton molecules are tailored into four phase-defined regimes, thus constituting the phase-tailored quaternary encoding format. Such phase-tailored streams are endowed with great robustness and are resistant to significant timing jitter. All these results experimentally demonstrate the programmable phase tailoring and exemplify the application of the phase-tailored quaternary encoding, prospectively promoting high-capacity all-optical storage.
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Affiliation(s)
- Yusong Liu
- School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory of Optoelectronic Technology and Systems (Ministry of Education), Chongqing University, Chongqing, China
| | - Siyun Huang
- School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China
- Key Laboratory of Optoelectronic Technology and Systems (Ministry of Education), Chongqing University, Chongqing, China
| | - Zilong Li
- School of Engineering and Materials Science, Queen Mary University of London, London, UK
| | - Haoguang Liu
- School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China
| | - Yixiang Sun
- School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China
| | - Ran Xia
- School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China
| | - Lisong Yan
- School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China
| | - Yiyang Luo
- Key Laboratory of Optoelectronic Technology and Systems (Ministry of Education), Chongqing University, Chongqing, China.
| | - Huanhuan Liu
- Department of Electronic and Electrical Engineering, Southern University of Science and Technology, Shenzhen, China
| | - Gang Xu
- School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China
| | - Qizhen Sun
- School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China.
| | - Xiahui Tang
- School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China
| | - Perry Ping Shum
- Department of Electronic and Electrical Engineering, Southern University of Science and Technology, Shenzhen, China
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Li W, Qian K, Zhang N, He F, Zhang L, Qiu D, Liu S, Chen S, Liu C. Mode-locking fiber laser with dual wavelength continuous-waves-induced resonant spectral sidebands. OPTICS EXPRESS 2022; 30:32761-32768. [PMID: 36242331 DOI: 10.1364/oe.467765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 08/14/2022] [Indexed: 06/16/2023]
Abstract
The optical spectrum of mode-locked lasers can exhibit multiple peaks resulting from different mechanisms such as modulation instability, dispersive waves (DWs), and coupling between continuous waves (CWs) and DWs. The latter was recently reported in a mode-locked fiber laser. Here we show that besides the coupling between single-wavelength CW and DWs, dual-wavelength CWs can also couple with DWs giving rise to quite different spectral peaks in a mode-locked fiber laser. In particular, we find that the sidebands of one CW can couple with the other CW, leading to an enhancement of the CWs.
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