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

Yanqing Deng; Dongning Yue; Mufei Luo; Xu Zhao; Yaojun Li; Xulei Ge; Feng Liu; Suming Weng; Min Chen; Xiaohui Yuan; Jie Zhang

doi:10.1017/hpl.2022.30

Journals >High Power Laser Science and Engineering >Volume 10 >Issue 6 >Page 06000e39 > Article

High Power Laser Science and Engineering
Vol. 10, Issue 6, 06000e39 (2022)

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

Yanqing Deng^1、2, Dongning Yue^1、2, Mufei Luo^1、2, Xu Zhao^1、2, Yaojun Li^1、2, Xulei Ge^1、2, Feng Liu^1、2, Suming Weng^1、2, Min Chen^1、2、*, Xiaohui Yuan^1、2, and Jie Zhang^1、2

Author Affiliations

¹Key Laboratory for Laser Plasmas (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, China

²Collaborative Innovation Center of IFSA, Shanghai Jiao Tong University, Shanghai, China

show less

DOI: 10.1017/hpl.2022.30 Cite this Article Set citation alerts

Yanqing Deng, Dongning Yue, Mufei Luo, Xu Zhao, Yaojun Li, Xulei Ge, Feng Liu, Suming Weng, Min Chen, Xiaohui Yuan, Jie Zhang. Effects of second-order dispersion of ultrashort laser pulse on stimulated Raman scattering[J]. High Power Laser Science and Engineering, 2022, 10(6): 06000e39 Copy Citation Text

EndNote(RIS)

BibTex

Plain Text

show less

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.

Keywords

second-order dispersion stimulated Raman scattering ultrashort intense laser

$$\begin{align} a(t) = {a}_0\exp \left(-\frac{t^2}{\tau^2}\right)\exp \left[i{\omega}_0t\left(1+\beta t\right)\right],\end{align}$$

((1))

View in Article

$$\begin{align}\tau = {\left[\left(4+\Delta {\omega}^4{\psi}_2^2\right)/\Delta {\omega}^2\right]}^{1/2},\end{align}$$

((2))

View in Article

$$\begin{align}\beta = \Delta {\omega}^4{\psi}_2/\left[2{\omega}_0\left(4+\Delta {\omega}^4{\psi}_2^2\right)\right],\end{align}$$

((3))

View in Article

$$\begin{align}{\gamma}_0\approx \frac{k_{\mathrm{epw}}}{8}{v}_{\mathrm{osc}}{\left[\frac{\omega_{\mathrm{pe}}^2}{\omega_{\mathrm{epw}}\left({\omega}_0-{\omega}_{\mathrm{epw}}\right)}\right]}^{1/2},\end{align}$$

((4))

View in Article

$$\begin{align}\left\langle \varepsilon \right\rangle = \frac{\int_0^{\frac{\pi }{2}}2{E}_{\mathrm{q}}W(t)\mathit{\cos}{\phi}^2 \mathrm{d}\phi}{\int_0^{\frac{\pi }{2}}W(t) \mathrm{d}\phi},\end{align}$$

((5))

View in Article

$$\begin{align} \begin{array}{ll}{\Gamma}_{\mathrm{p}} = \!\!\!\!\!\!\!\!& {\left(\dfrac{\pi }{8}\right)}^{1/2}\dfrac{\omega_{\mathrm{pe}}}{{\left({k}_{\mathrm{p}}{\lambda}_{\mathrm{D}}\right)}^3}\mathit{\exp}\left[-\dfrac{1}{2}{\left({k}_{\mathrm{p}}{\lambda}_{\mathrm{D}}\right)}^{-2}-\dfrac{3}{2}\right]\\[6pt] {}& +{\left({\omega}_{\mathrm{pe}}/{\omega}_{\mathrm{epw}}\right)}^2{v}_{\mathrm{ei}},\end{array}\end{align}$$

((6))

View in Article

$$\begin{align}\kern-5pt\kappa = {\left[\frac{\gamma_0^2}{v_{1\mathrm{x}}{v}_{2\mathrm{x}}}+\frac{1}{4}{\left(\frac{\Gamma_{\mathrm{s}}}{v_{1\mathrm{x}}}-\frac{\Gamma_{\mathrm{p}}}{v_{2\mathrm{x}}}\right)}^2\right]}^{1/2}-\frac{1}{2}\left(\frac{\Gamma_{\mathrm{s}}}{v_{1\mathrm{x}}}+\frac{\Gamma_{\mathrm{p}}}{v_{2\mathrm{x}}}\right),\end{align}$$

((7))