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Study of the competition between forward and backward stimulated Raman scattering in methane
Leng, J; Sha, G; Hua, X; Yang, H; Zhang, C
刊名APPLIED PHYSICS B-LASERS AND OPTICS
2006-03-01
DOI10.1007/s00340-005-2075-z
82期:3页:463-468
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Optics ; Physics, Applied
研究领域[WOS]Optics ; Physics
关键词[WOS]BRILLOUIN-SCATTERING ; RELAXATION OSCILLATIONS ; GEOMETRY ; MODEL ; CH4
英文摘要Simultaneous forward and backward stimulated Raman scattering (SRS) in methane pumped by a single longitudinal mode Nd:YAG laser at 355 nm has been investigated both experimentally and numerically. For forward SRS, a maximum energy-conversion efficiency of 55% was obtained under 24 atm, while for backward SRS the corresponding figure was 58% under 4.7 atm. Under low pressures or at low pump energies, the conversion efficiency for backward SRS was found to be much higher than that for forward SRS, while the situation is quite the contrary under high pressures and at high pump energies. A quasi-two-dimensional numerical model is introduced to elucidate the competition between forward and backward SRS; we conclude that the high-pressure and high-pump-energy experimental results should be caused by the thermal defocusing effect in the SRS process. This is confirmed by the experimental fact that a decrease of the pulse-repetition rate increases the conversion efficiency for backward SRS but decreases that for forward SRS under high pressures. Our calculated results are in good agreement with the experimental results at a pulse-repetition rate of 2 Hz.
语种英语
WOS记录号WOS:000235120200022
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文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/140377
专题中国科学院大连化学物理研究所
作者单位Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
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Leng, J,Sha, G,Hua, X,et al. Study of the competition between forward and backward stimulated Raman scattering in methane[J]. APPLIED PHYSICS B-LASERS AND OPTICS,2006,82(3):463-468.
APA Leng, J,Sha, G,Hua, X,Yang, H,&Zhang, C.(2006).Study of the competition between forward and backward stimulated Raman scattering in methane.APPLIED PHYSICS B-LASERS AND OPTICS,82(3),463-468.
MLA Leng, J,et al."Study of the competition between forward and backward stimulated Raman scattering in methane".APPLIED PHYSICS B-LASERS AND OPTICS 82.3(2006):463-468.
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