Year: 2025
Type: article
Abstract: We experimentally and through simulations demonstrate a passively mode-locked fiber laser based on nonlinear polarization rotation, which generates the evolution from h-shaped pulses to GHz harmonic trains. When the polarization angle is continuously changed, the h-shaped pulse sequentially evolves into multiple pulses, bunched solitons, and harmonic pulses. The maximum order of harmonic trains obtained in experiments is 120, corresponding to the repetition frequency of 1.03996 GHz. The coupled Ginzburg-Landau equation and two-time-scale approach to gain is provided to characterize the laser physics. The fast and slow evolution of gain contributes to the stabilization and length of one soliton pattern, respectively. The proposed fiber laser is cost effective and easy to implement, providing a potential way to study soliton dynamics in depth.
Source: Micromachines
DOI: 10.3390/mi16121358
Authors: Lin Wang, Guoqing Hu, Yan Wang, Guangwei Chen, Liang Xuan, Zhehai Zhou, Jun Yu
Institution: Beijing Information Science & Technology University
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,534
Awards: G1529690988, G5211050114, G5341668857
OpenAlex ID: W4416850188