Effects of second-order dispersion of ultrashort laser pulse on stimulated Raman scattering

The influence of second-order dispersion (SOD) on stimulated Raman scattering (SRS) in the interaction of an ultrashort intense laser with plasma was investigated. More significant backward SRS was observed with the increase of the absolute value of SOD ($\mid \kern-1pt\!{\psi}_2\!\kern-1pt\mid$). T...

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Bibliographic Details
Published in:High power laser science and engineering 2022-01, Vol.10, Article e39
Main Authors: Deng, Yanqing, Yue, Dongning, Luo, Mufei, Zhao, Xu, Li, Yaojun, Ge, Xulei, Liu, Feng, Weng, Suming, Chen, Min, Yuan, Xiaohui, Zhang, Jie
Format: Article
Language:English
Subjects:
Angular distribution
Dispersion
Energy
Filaments
Landau damping
Lasers
Light
Luminous intensity
Optics
Plasma
Pulse duration
Raman spectra
Spectrum analysis
Velocity
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Summary:The influence of second-order dispersion (SOD) on stimulated Raman scattering (SRS) in the interaction of an ultrashort intense laser with plasma was investigated. More significant backward SRS was observed with the increase of the absolute value of SOD ($\mid \kern-1pt\!{\psi}_2\!\kern-1pt\mid$). The integrated intensity of the scattered light is positively correlated to the driver laser pulse duration. Accompanied by the side SRS, filaments with different angles along the laser propagation direction were observed in the transverse shadowgraph. A model incorporating Landau damping and above-threshold ionization was developed to explain the SOD-dependent angular distribution of the filaments.
ISSN:2095-4719
2052-3289
DOI:10.1017/hpl.2022.30