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arXiv · 2401.10577

Observation of periodic optical spectra and soliton molecules in a novel passively mode-locked fiber laser

Xiang Zhang·Haobin Zheng·Kangrui Chang·Yong Shen·Yongzhuang Zhou·Qiao Lu·Hongxin Zou
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Abstract

Due to the necessity of making a series of random adjustments after mode-locking in most experiments for preparing soliton molecules, the repeatability of the preparations remains a challenge. Here, we introduce a novel all-polarization-maintaining erbium-doped fiber laser that utilizes a nonlinear amplifying loop mirror for mode-locking and features a linear shape. This laser can stably output soliton molecules without any additional adjustment once the mode-locking self-starts. Moreover, it can achieve the transition from soliton molecule state to soliton state, and then to multi-pulse state by reducing the pumping power. The unconventional method of generating multi-pulses, combined with a wide pumping power range of 200--640 mW for maintaining mode-locking, allowed us to observe periodic optical spectra with two complete cycles for the first time. Based on the experimental facts, we develop a multistability model to explain this phenomenon. With its ability to switch between three stable states, this flexible laser can serve as a versatile toolbox for studying soliton dynamics.

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Xiang Zhang, Haobin Zheng, Kangrui Chang, Yong Shen, Yongzhuang Zhou, Qiao Lu, Hongxin Zou. 2024-01-19. Observation of periodic optical spectra and soliton molecules in a novel passively mode-locked fiber laser. https://doi.org/10.1109/jlt.2024.3390059

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