兹布兰
光学
光纤激光器
材料科学
模式锁定
激光器
脉冲持续时间
皮秒
飞秒
纳秒
光电子学
物理
作者
Linpeng Yu,Ziya Tang,Jinhui Liang,Qinghui Zeng,Jiachen Wang,Xing Luo,Jinzhang Wang,Peiguang Yan,Fanlong Dong,Xing Liu,Qitao Lue,Chunyu Guo,Shuangchen Ruan
出处
期刊:Optics Letters
[Optica Publishing Group]
日期:2023-03-06
卷期号:48 (7): 1830-1830
被引量:4
摘要
We report a hybrid mode-locked fiber laser at 2.8 µm based on a large-mode-area Er:ZBLAN fiber. Reliable self-starting mode-locking is achieved via the combination of nonlinear polarization rotation and a semiconductor saturable absorber. Stable mode-locked pulses with a pulse energy of 9.4 nJ and a pulse duration of 325 fs are generated. To the best of our knowledge, this is the highest pulse energy directly generated from a femtosecond mode-locked fluoride fiber laser (MLFFL) to date. The measured M2 factors are below 1.13, indicating a nearly diffraction-limited beam quality. Demonstration of this laser provides a feasible scheme for the pulse energy scaling of mid-infrared MLFFLs. Moreover, a peculiar multi-soliton mode-locking state is also observed, in which the time interval between the solitons varies irregularly from tens of picoseconds to several nanoseconds.
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