Influence of pressure on spectral broadening of femtosecond laser pulses in air

doi:10.1063/5.0042998

CORC > 长春光学精密机械与物理研究所 > 中国科学院长春光学精密机械与物理研究所

	Influence of pressure on spectral broadening of femtosecond laser pulses in air
	H. Zhang; Y. Zhang; S. Lin; Y. Zhang; A. Chen; Y. Jiang; S. Li and M. Jin
刊名	Physics of Plasmas
	2021
卷号	28 期号:4 页码:1ENG
ISSN号	1070664X
DOI	10.1063/5.0042998
英文摘要	Spectral broadening is an important nonlinear effect during the interaction of intense femtosecond laser pulses with air. In this paper, we experimentally study the dependence of spectral broadening on pressure and pulse energy. It is found that increasing both pressure and pulse energy can enhance the spectral intensity, while only increasing pressure leads to obvious blue shift of spectra, and the pulse energy has little effect on it. To get a better insight of the mechanism of spectral broadening, the numerical simulation relating the instantaneous frequency to the time dependent pulse intensity and time dependent plasma density in air is carried out. The results indicate that the plasma generation induced self-phase modulation which is related to the pressure plays an important role in blue shift of spectrum. Besides the transmission of the laser pulse is measured and decreases with pressure. It proves that the energy transfer of the laser pulse is promoted by pressure. This study will be helpful to understand a deeper physical mechanism of femtosecond filament induced supercontinnum generation in air. 2021 Author(s).
URL标识	查看原文
内容类型	期刊论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/65340]
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	H. Zhang,Y. Zhang,S. Lin,et al. Influence of pressure on spectral broadening of femtosecond laser pulses in air[J]. Physics of Plasmas,2021,28(4):1ENG.
APA	H. Zhang.,Y. Zhang.,S. Lin.,Y. Zhang.,A. Chen.,...&S. Li and M. Jin.(2021).Influence of pressure on spectral broadening of femtosecond laser pulses in air.Physics of Plasmas,28(4),1ENG.
MLA	H. Zhang,et al."Influence of pressure on spectral broadening of femtosecond laser pulses in air".Physics of Plasmas 28.4(2021):1ENG.