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 μJ (∼30 Pcr), 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.
| 源语言 | 英语 |
|---|---|
| 期刊论文编号 | 094101 |
| 期刊 | Applied Physics Letters |
| 卷 | 112 |
| 期 | 9 |
| DOI | |
| 出版状态 | 已出版 - 26 2月 2018 |
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