Collective stimulated Brillouin scattering modes of two crossing laser beams with shared scattered wave

In inertial confinement fusion (ICF), overlapping of laser beams is common. Owing to the effective high laser intensity of the overlapped beams, the collective mode of stimulated Brillouin scattering (SBS) with a shared scattered light wave is potentially important. In this work, an exact analytic s...

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Autores principales:	Jie Qiu, Liang Hao, Lihua Cao, Shiyang Zou
Formato:	article
Lenguaje:	EN
Publicado:	AIP Publishing LLC 2021
Materias:	Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Acceso en línea:	https://doaj.org/article/cb7d2de1987742f486ecfde6da7cca04
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spelling	oai:doaj.org-article:cb7d2de1987742f486ecfde6da7cca042021-12-01T18:51:44ZCollective stimulated Brillouin scattering modes of two crossing laser beams with shared scattered wave2468-080X10.1063/5.0062902https://doaj.org/article/cb7d2de1987742f486ecfde6da7cca042021-11-01T00:00:00Zhttp://dx.doi.org/10.1063/5.0062902https://doaj.org/toc/2468-080XIn inertial confinement fusion (ICF), overlapping of laser beams is common. Owing to the effective high laser intensity of the overlapped beams, the collective mode of stimulated Brillouin scattering (SBS) with a shared scattered light wave is potentially important. In this work, an exact analytic solution for the convective gain coefficient of the collective SBS modes with shared scattered wave is presented for two overlapped beams based on a linear kinetic model. The effects of the crossing angle, polarization states, and finite beam overlapping volume of the two laser beams on the shared light modes are analyzed for cases with zero and nonzero wavelength difference between the two beams. It is found that all these factors have a significant influence on the shared light modes of SBS. Furthermore, the out-of-plane modes, in which the wavevectors of daughter waves lie in different planes from the two overlapped beams, are found to be important for certain polarization states and especially for obtuse crossing angles. In particular, adjusting the polarization directions of the two beams to be orthogonal to each other or tuning the wavelength difference to a sufficiently large value (of the order of nanometers) are found to be effective methods to suppress the shared light modes of SBS. This work will be helpful for comprehending and suppressing collective SBS with shared scattered waves in ICF experiments.Jie QiuLiang HaoLihua CaoShiyang ZouAIP Publishing LLCarticleNuclear and particle physics. Atomic energy. RadioactivityQC770-798ENMatter and Radiation at Extremes, Vol 6, Iss 6, Pp 065903-065903-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
spellingShingle	Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 Jie Qiu Liang Hao Lihua Cao Shiyang Zou Collective stimulated Brillouin scattering modes of two crossing laser beams with shared scattered wave
description	In inertial confinement fusion (ICF), overlapping of laser beams is common. Owing to the effective high laser intensity of the overlapped beams, the collective mode of stimulated Brillouin scattering (SBS) with a shared scattered light wave is potentially important. In this work, an exact analytic solution for the convective gain coefficient of the collective SBS modes with shared scattered wave is presented for two overlapped beams based on a linear kinetic model. The effects of the crossing angle, polarization states, and finite beam overlapping volume of the two laser beams on the shared light modes are analyzed for cases with zero and nonzero wavelength difference between the two beams. It is found that all these factors have a significant influence on the shared light modes of SBS. Furthermore, the out-of-plane modes, in which the wavevectors of daughter waves lie in different planes from the two overlapped beams, are found to be important for certain polarization states and especially for obtuse crossing angles. In particular, adjusting the polarization directions of the two beams to be orthogonal to each other or tuning the wavelength difference to a sufficiently large value (of the order of nanometers) are found to be effective methods to suppress the shared light modes of SBS. This work will be helpful for comprehending and suppressing collective SBS with shared scattered waves in ICF experiments.
format	article
author	Jie Qiu Liang Hao Lihua Cao Shiyang Zou
author_facet	Jie Qiu Liang Hao Lihua Cao Shiyang Zou
author_sort	Jie Qiu
title	Collective stimulated Brillouin scattering modes of two crossing laser beams with shared scattered wave
title_short	Collective stimulated Brillouin scattering modes of two crossing laser beams with shared scattered wave
title_full	Collective stimulated Brillouin scattering modes of two crossing laser beams with shared scattered wave
title_fullStr	Collective stimulated Brillouin scattering modes of two crossing laser beams with shared scattered wave
title_full_unstemmed	Collective stimulated Brillouin scattering modes of two crossing laser beams with shared scattered wave
title_sort	collective stimulated brillouin scattering modes of two crossing laser beams with shared scattered wave
publisher	AIP Publishing LLC
publishDate	2021
url	https://doaj.org/article/cb7d2de1987742f486ecfde6da7cca04
work_keys_str_mv	AT jieqiu collectivestimulatedbrillouinscatteringmodesoftwocrossinglaserbeamswithsharedscatteredwave AT lianghao collectivestimulatedbrillouinscatteringmodesoftwocrossinglaserbeamswithsharedscatteredwave AT lihuacao collectivestimulatedbrillouinscatteringmodesoftwocrossinglaserbeamswithsharedscatteredwave AT shiyangzou collectivestimulatedbrillouinscatteringmodesoftwocrossinglaserbeamswithsharedscatteredwave
_version_	1718404720637247488

Collective stimulated Brillouin scattering modes of two crossing laser beams with shared scattered wave

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