Enhanced stimulated Raman scattering by femtosecond ultraviolet plasma grating in water

被引：10
|
作者：
Liu, Fengjiang [1 ]
Yuan, Shuai [2 ]
He, Boqu [1 ]
Nan, Junyi [1 ]
Khan, Abdul Qayyum [1 ]
Ding, Liang'en [1 ]
Zeng, Heping [1 ,2 ]
机构：
[1] East China Normal Univ, State Key Lab Precis Spect, Shanghai 200062, Peoples R China
[2] Univ Shanghai Sci & Technol, Shanghai Key Lab Modern Opt Syst, Engn Res Ctr Opt Instrument & Syst, Minist Educ,Sch Opt Elect & Comp Engn, Shanghai 200093, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2018年 / 112卷 / 09期
关键词：
FILAMENTS; GENERATION; DYNAMICS; AIR;
D O I：
10.1063/1.5018629
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Efficient forward stimulated Raman scattering (SRS) was observed along 400-nm femtosecond (fs) laser filaments in water. SRS conversion dominated over self-phase modulation induced continuum generation as the input pulse energy was above 4 mu J (similar to 30 P-cr), implying that plasma in the aqueous filamentation channel played an important role in compensating for the group velocity walk-off between the pump and Stokes pulses. By overlapping two synchronous fs 400-nm filaments to form plasma grating in water, significant enhancement of SRS conversion was observed. Such a SRS enhancement originated from the ultrahigh plasma density in the intersection region of the preformed plasma grating. Published by AIP Publishing.
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页数：5
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