Kavli Affiliate: Xiang Zhang
| First 5 Authors: Xiang Zhang, Haobin Zheng, Kangrui Chang, Yong Shen, Yongzhuang Zhou
| Summary:
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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