Investigation of stimulated rotational Raman scattering of the high-power broadband laser with applied angular dispersion

Smoothing by spectral dispersion （SSD） leads to considerable improvement on laser-irradiation uniformity in far field for fusion lasers. Phase modulation in time and spectral angular dispersion （SAD） across the beam introduced by SSD will affect the stimulated rotational Raman scattering （SRRS） gain...

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Bibliographic Details
Published inChinese physics B Vol. 22; no. 12; pp. 276 - 279
Main Author 樊心民 吕志伟 林殿阳 刘颖 朱成禹 何伟明 丁磊
Format Journal Article
LanguageEnglish
Published 01.12.2013
Subjects
Constants
Dispersions
Far fields
Gain
Lasers
Near fields
Raman scattering
Rotational
Spectra
受激
宽带激光
应用
拉曼散射
旋转
相位调制
角色散
高功率
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ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/22/12/124206

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Summary:Smoothing by spectral dispersion （SSD） leads to considerable improvement on laser-irradiation uniformity in far field for fusion lasers. Phase modulation in time and spectral angular dispersion （SAD） across the beam introduced by SSD will affect the stimulated rotational Raman scattering （SRRS） gain in the near field. This paper focuses on the influence of SAD on SRRS gain under different laser conditions. Results show that the SAD will aggravate the generation of SRRS when the laser initial additional phase is constant. On the contrary, the SAD can reduce the SRRS gain if appropriate SSD parameters are adopted when the laser initial additional phase is variable. SSD has a certain application prospect in SRRS suppression.
Bibliography:Fan Xin-Mina, Lü Zhi-Weia, Lin Dian-Yanga, Liu Yinga, Zhu Cheng-Yua, He Wei-Minga, Ding Leia b（a National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150080, China;b Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China ）
Smoothing by spectral dispersion （SSD） leads to considerable improvement on laser-irradiation uniformity in far field for fusion lasers. Phase modulation in time and spectral angular dispersion （SAD） across the beam introduced by SSD will affect the stimulated rotational Raman scattering （SRRS） gain in the near field. This paper focuses on the influence of SAD on SRRS gain under different laser conditions. Results show that the SAD will aggravate the generation of SRRS when the laser initial additional phase is constant. On the contrary, the SAD can reduce the SRRS gain if appropriate SSD parameters are adopted when the laser initial additional phase is variable. SSD has a certain application prospect in SRRS suppression.
spectral angular dispersion smoothing by spectral dispersion rotational Raman scattering
11-5639/O4
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/22/12/124206