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首页> 外文期刊>Applied optics >Mode-locking pulse generation with MoS2-PVA saturable absorber in both anomalous and ultra-long normal dispersion regimes
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Mode-locking pulse generation with MoS2-PVA saturable absorber in both anomalous and ultra-long normal dispersion regimes

机译：MoS2-PVA饱和吸收器在异常和超长正常色散状态下产生锁模脉冲

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摘要

We experimentally demonstrate a stable and simple mode locked erbium doped fiber laser (EDFL) utilizing passive few-layer molybdenum disulfide (MoS2) as a saturable absorber. The MoS2 is obtained by liquid phase exfoliation before it is embedded in a polymer composite film and then inserted in the laser cavity. A stable soliton pulse train started at a low threshold pump power of 20mWin the anomalous dispersion regime after fine-tuning the rotation of the polarization controller. The central wavelength, 3 dB bandwidth, pulse width, and repetition rate of the soliton pulses are 1574.6 nm, 9.5 nm, 790 fs, and 29.5 MHz, respectively. By inserting a 850 m long dispersion shifted fiber (DSF) in the cavity, a dissipative soliton with square pulse train is obtained in the normal dispersion regime where the operating wavelength is centered at 1567.44 nm with a 3 dB bandwidth of 19.68 nm. The dissipative soliton pulse has a pulse width of 90 ns at a low repetition rate of 231.5 kHz due to the long DSF used. These results are a contribution to the pool of knowledge in nonlinear optical properties of two-dimensional nanomaterials especially for ultrafast photonic applications. (C) 2016 Optical Society of America
机译：我们通过实验证明了一种稳定且简单的锁模掺光纤激光器（EDFL），它利用无源几层二硫化钼（MoS2）作为可饱和吸收剂。 MoS 2通过液相剥落获得，然后将其嵌入聚合物复合膜中，然后插入激光腔中。在微调偏振控制器的旋转后，稳定的孤子脉冲序列以20m的低阈值泵浦功率启动，赢得了异常色散状态。孤子脉冲的中心波长，3 dB带宽，脉冲宽度和重复率分别为1574.6 nm，9.5 nm，790 fs和29.5 MHz。通过在腔中插入850 m长的色散位移光纤（DSF），可以在正常色散状态下获得具有方形脉冲序列的耗散孤子，该色散孤子的工作波长集中在1567.44 nm，3 dB带宽为19.68 nm。由于使用了较长的DSF，所以在231.5 kHz的低重复频率下，耗散孤子脉冲的脉冲宽度为90 ns。这些结果有助于二维纳米材料的非线性光学特性方面的知识积累，特别是对于超快光子应用。 （C）2016美国眼镜学会

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