Plasma-Induced Dispersive Wave Generation in Hollow-Core Kagome Photonic Crystal Fiber

被引：0
|
作者：
Zhao T. [1 ]
Wei D. [1 ]
Sun F. [1 ]
Ding X. [1 ]
Zhang G. [1 ]
Yao J. [1 ]
机构：
[1] Key Laboratory of the Ministry of Education on Optoelectronic Information Technology, School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin
来源：
Zhongguo Jiguang/Chinese Journal of Lasers | 2017年 / 44卷 / 05期
关键词：
Dispersive wave; Fiber optics; Laser plasma; Photonic crystal fiber; Ultrashort pulse nonlinear effect;
D O I：
10.3788/CJL201744.0508001
中图分类号：
学科分类号：
摘要：
Dispersive waves of mid-infrared band generated when the ultrashort pulse is launched into hollow-core Kagome photonic crystal fiber filled with Krypton gas are numerically investigated with the unidirectional pulse propagation equation. Two types of input pulses are studied, including a Gaussian pump centered at 1.4 μm and a near-saw-tooth-shaped two-color pulse centered at 1.4 μm added with its second harmonic. Multiple dispersive waves are observed under the two situations which are in agreement with the phase-matching conditions. In order to optimize dispersive waves, the near-saw-tooth-shaped pulse is used as the pump pulse. The second ionization of Krypton gas filled in fiber is caused by pump pulse compression, so that the earlier-generated dispersive waves are converted to new ones at longer wavelengths. This observation is legitimately explained by the plasma corrected phase-matching condition. The mid-infrared ultrashort pulse generation and the dispersive wave theory are discussed. © 2017, Chinese Lasers Press. All right reserved.
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