Resonant second harmonic generation of chirped pulse laser in plasma

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• 作者：Vishal Thakur ; Niti Kant ; ^{nitikant@yahoo.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Second harmonic generation ; Chirped pulse laser ; Plasma
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：129
• 期：Complete
• 页码：239-247
• 全文大小：736 K

文摘

Resonant second harmonic generation of a relativistic self-focusing chirped pulse laser in plasma has been investigated. The second harmonic undergoes periodic focusing in the plasma channel created by the fundamental wave and the strength of focusing increases with the propagation distance. The normalized second-harmonic amplitude varies periodically with distance and attains maximum value in the focal region. A significant enhancement in the intensity of second harmonic on account of relativistic self-focusing of the chirped pulse laser is seen. We have also examined the effect of chirped pulse on the normalized amplitude of the second harmonic generation. A sharp increase in the normalized second harmonic amplitude is seen for positive chirp.