期刊
PHOTONICS RESEARCH
卷 7, 期 3, 页码 332-340出版社
OPTICAL SOC AMER
DOI: 10.1364/PRJ.7.000332
关键词
-
类别
资金
- Natural Science Foundation of Jiangsu Province, China [BK20170243]
- National Natural Science Foundation of China (NSFC) [61705094, 11674133, 11711530208, 61575089]
- Key Research Program of Natural Science of Jiangsu Higher Education Institutions [17KJA416004]
- Royal Society [IE161214]
- Protocol of the 37th Session of China-Poland Scientific and Technological Cooperation Committee [37-17]
- H2020 Marie Sklodowska-Curie Actions (MSCA) [790666]
- Jiangsu Overseas Visiting Scholar Program for University Prominent Young and Middle-aged Teachers and Presidents
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- EPSRC [EP/L022559/2, EP/L022559/1] Funding Source: UKRI
We experimentally demonstrated a type of tunable and switchable harmonic h-shaped pulse generation in a thulium-doped fiber (TDF) laser passively mode locked by using an ultralong nonlinear optical loop mirror. The total cavity length was similar to 3.03 km, the longest ever built for a TDF laser to our best knowledge, which resulted in an ultralarge anomalous dispersion over -200 ps(2) around the emission wavelength. The produced h-shaped pulse can operate either in a fundamental or in a high-order harmonic mode-locking (HML) state depending on pump power and intra-cavity polarization state (PS). The pulse duration, no matter of the operation state, was tunable with pump power. However, pulse breaking and self-organizing occurred, resulting in high-order HML, when the pump power increased above a threshold. At a fixed pump power, the order of HML was switchable from one to another by manipulating the PS. Switching from the 8th up to the 48th order of HML was achieved with a fixed pump power of similar to 4.15 W. Our results revealed the detailed evolution and switching characteristics of the HML and individual pulse envelope with respect to both the pump power and PS. We have also discussed in detail the mechanisms of both the h-shaped pulse generation and the switching of its HML. This contribution would be helpful for further in-depth study on the underlying dynamics of long-duration particular-envelope pulses with ultralarge anomalous dispersion and ultralong roundtrip time. (C) 2019 Chinese Laser Press
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据