Femtosecond pulse erbium-doped fiber laser by a few-layer MoS2 saturable absorber
Femtosecond pulse erbium-doped fiber laser by a few-layer MoS2 saturable absorber
复制标题
几层MoS2可饱和吸收体飞秒脉冲掺铒光纤激光器
DOI：
10.1364/ol.39.004591
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发表时间：
2014-08-01
期刊：
影响因子：
3.6
通讯作者：
Zhang, Han
中科院分区：
文献类型：
--
作者：
Liu, Hao;Luo, Ai-Ping;Zhang, Han
报道了利用聚乙烯醇（PVA）基二硫化钼（MoS 2）可饱和吸收体（SA）在光纤环形激光器中产生飞秒脉冲的实验研究。在饱和光强为34 MW/cm（2）、调制深度约为4.3%的情况下，将PVA基MoS 2 SA作为锁模器与环形腔掺铒光纤激光器配合使用。在22 mW的低泵浦阈值下实现了锁模操作。在适当的腔色散条件下，获得了中心波长为1569.5nm、重复频率为12.09MHz的710 fs脉冲。随着净腔色散的变化，获得了脉宽为0.71 ~ 1.46ps的脉冲输出。获得了1.55 μ m波段的飞秒脉冲，证实了MoS 2的宽带可饱和吸收，同时也表明薄膜状PVA基MoS 2 SA确实是一种很好的超快可饱和吸收器件候选材料。(C)2014年美国光学学会
We report on the generation of a femtosecond pulse in a fiber ring laser by using a polyvinyl alcohol (PVA)-based molybdenum disulfide (MoS2) saturable absorber (SA). With a saturable optical intensity of 34 MW/cm(2) and a modulation depth of similar to 4.3%, the PVA-based MoS2 SA had been employed with an erbium-doped fiber ring laser as a mode locker. The mode-locking operation could be achieved at a low pump threshold of 22 mW. A similar to 710 fs pulse centered at 1569.5 nm wavelength with a repetition rate of 12.09 MHz had been achieved with proper cavity dispersion. With the variation of net cavity dispersion, output pulses with durations from 0.71 to 1.46 ps were obtained. The achievement of a femtosecond pulse at 1.55 mu m waveband demonstrates the broadband saturable absorption of MoS2, and also indicates that the filmy PVA-based MoS2 SA is indeed a good candidate for an ultrafast saturable absorption device. (C) 2014 Optical Society of America