Highly efficient transient stimulated Raman scattering on secondary vibrational mode of BaWO_(4) crystal due to its constructive interference with self-phase modulation  

作　　者：Igor Kinyaevskiy Valeri Kovalev Pavel Danilov Nikita Smirnov Sergey Kudryashov Andrey Koribut Andrey Ionin 

机构地区：[1]P.N.Lebedev Physical Institute of the Russian Academy of Sciences,Moscow 119991,Russia

出　　处：《Chinese Optics Letters》2023年第3期113-117,共5页中国光学快报（英文版）

基　　金：funded by the Russian Science Foundation(No.22-79-10068)。

摘　　要：An exceptionally high stimulated Raman scattering[SRS]conversion efficiency to the first Stokes component associated with the secondary[low-frequency and low intensity]vibrational mode v2[~330 cm^[-1]]was observed in a BaWO4 crystal in a highly transient regime of interaction.The effect takes place in the range of pump pulse energy from~0.1 to~0.5μJ with maximum energy conversion efficiency up to 35%at 0.2μJ.The nature of the observed effects is explained by interference of SRS and self-phase modulation,where the latter is related to a noninstantaneous orientational Kerr nonlinearity in the BaWO4 crystal.

关 键 词：stimulated Raman scattering secondary vibrational mode self-phase modulation ultrashort laser pulses transient phenomena 

分 类 号：TN24[电子电信—物理电子学] O437.3[机械工程—光学工程]