Journal
OPTICS EXPRESS
Volume 28, Issue 2, Pages 912-923Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.380328
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Funding
- National Natural Science Foundation of China [61675008, 61805281]
- Shenzhen Technology and Innovation Council [KQJSCX20170727163424873]
- Tsinghua-Berkeley Shenzhen Institute (TBSI) Faculty Start-up Fund
- Natural Science Foundation of Guangdong Province [2019A1515010732]
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We experimentally report the dynamics of multi-soliton patterns noise-like pulses (NLPs) in a passively mode-locked fiber laser, which the pulse duration can be linearly tuned from 8.21 ns to 128.23 ns by 2.936 ns / 10 mW. Benefiting from the drastically strengthened nonlinear effects in the cavity and the high gain amplification in the unidirectional ring (UR), the transformation from rectangular-shaped NLP to Gaussian-shaped NLP is experimentally achieved. Versatile multi-soliton patterns are observed in NLP regime for the first time, namely, single-scale soliton clusters, high-order harmonic mode-locking, and localized chaotic multiple pulses. In particular, the spectrum evolution with pump power and spectrum stability in 2 hours are also monitored. The obtained results demonstrate the rectangular-shaped NLP can fully transform into Gaussian-shaped NLP, and the multi-soliton patterns can exist in the NLP regime, which contributes to further understanding the nature and mechanism of the NLP in a passively mode-locked fiber laser. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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