Effects of second-order dispersion of ultrashort laser pulse on stimulated Raman scattering. (11th November 2022)

• Record Type: Journal Article
• Authors: Deng, Yanqing; Yue, Dongning; Luo, Mufei; Zhao, Xu; Li, Yaojun; Ge, Xulei; Liu, Feng; Weng, Suming; Chen, Min; Yuan, Xiaohui; Zhang, Jie
• Is Part Of: High power laser science and engineering. Volume 10(2022)
• Publication Date: 2022-11-11
• Subjects: second-order dispersion -- stimulated Raman scattering -- ultrashort intense laser; High power lasers -- Periodicals; 621.366
• DOI: 10.1017/hpl.2022.30
• Languages: English
• ISSNs: 2095-4719

Abstract

Abstract: 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.