DICP OpenIR
Highly efficient Raman conversion in O-2 pumped by a seeded narrow band second-harmonic Nd : YAG laser
Hua, X; Leng, J; Yang, H; Sha, G; Zhang, C
Source PublicationAPPLIED PHYSICS B-LASERS AND OPTICS
2005-08-01
DOI10.1007/s00340-005-1927-x
Volume81Issue:4Pages:525-530
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectOptics ; Physics, Applied
WOS Research AreaOptics ; Physics
WOS KeywordSTIMULATED BRILLOUIN-SCATTERING ; RADIATION ; OXYGEN ; GAIN
AbstractThe first-Stokes conversion efficiency for a stimulated Raman scattering (SRS) is usually very low in gaseous oxygen media. In 3.0 Mpa O-2, a single longitudinal mode second harmonic Nd:YAG laser pump source gives a typical vibrational first-Stokes conversion efficiency of only 2.5%, In comparison, the accompanying stimulated Brillouin scattering (SBS) attains a reflectivity of 67%. However, by seeding an OPO beam into the Raman cavity, the first-Stokes photon conversion efficiency now attains a peak value of 54%, while the SBS reflectivity reduces to 5% in a 6.1 Mpa 41:59 O-2/ He mixture. This 54% efficiency was obtained for a seeder laser pulse-width less than one half that of pump laser (6.8 ns). A first-Stokes peak power conversion efficiency as high as 88% has been obtained when the pump and seeder pulse peaks coincide. So, we may expect a higher first-Stokes photon conversion efficiency if the seeder pulse-width can be made equal to or larger than that of the pump pulse. On the other hand, the beam quality of the first-Stokes in an O-2/ He mixture excels that of the pump laser for a seeder energy of 5 mJ and pump energy of 50 mJ. However, at pump energies higher than 105 mJ and a pump laser repetition rate of 10 Hz, the thermal defocusing effect worsens the first-Stokes beam quality. This thermal defocusing effect is a result of the Raman heat release and could be eliminated by fast circulating and cooling the Raman gas medium.
Language英语
WOS IDWOS:000231460800015
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/139626
Collection中国科学院大连化学物理研究所
AffiliationChinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Hua, X,Leng, J,Yang, H,et al. Highly efficient Raman conversion in O-2 pumped by a seeded narrow band second-harmonic Nd : YAG laser[J]. APPLIED PHYSICS B-LASERS AND OPTICS,2005,81(4):525-530.
APA Hua, X,Leng, J,Yang, H,Sha, G,&Zhang, C.(2005).Highly efficient Raman conversion in O-2 pumped by a seeded narrow band second-harmonic Nd : YAG laser.APPLIED PHYSICS B-LASERS AND OPTICS,81(4),525-530.
MLA Hua, X,et al."Highly efficient Raman conversion in O-2 pumped by a seeded narrow band second-harmonic Nd : YAG laser".APPLIED PHYSICS B-LASERS AND OPTICS 81.4(2005):525-530.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Hua, X]'s Articles
[Leng, J]'s Articles
[Yang, H]'s Articles
Baidu academic
Similar articles in Baidu academic
[Hua, X]'s Articles
[Leng, J]'s Articles
[Yang, H]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Hua, X]'s Articles
[Leng, J]'s Articles
[Yang, H]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.