Experimental investigations on transverse spatial profile of beam in an SBS generator

Author

Gong, Huaping ; Yongxing Jin ; Dianyang Lin

Author_Institution

Institute of Opto-Electronics, China Jiliang University, Hangzhou 310018, China

Volume

2009-Supplement

fYear

2009

fDate

2-6 Nov. 2009

Firstpage

1

Lastpage

6

Abstract

Focusing Q-switched laser pulses into FC-72 medium, the transverse profiles and spatial evolution of beam in stimulated Brillouin scattering (SBS) are investigated experimentally by CCD camera and digital image processing technology, and the rules of spot size versus pump energy are obtained. The results show that the transverse profiles of backward SBS spots with different pump energies are Gaussian or quasi-Gaussian profiles when pump beam is Gaussian. And the spatial profiles of SBS spots change from quasi-Gaussian to Gaussian when the incident energy increases from the threshold to several times the threshold. At the same time, the size of SBS spot decreases with the increasing pump energy on the whole.

Keywords

Brillouin scattering; Charge coupled devices; Charge-coupled image sensors; Digital cameras; Digital images; Focusing; Laser beams; Laser excitation; Optical pulses; Pump lasers; phase conjugation; spatial profile; spot size; stimulated Brillouin scattering;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Photonics Conference and Exhibition (ACP), 2009 Asia

Conference_Location

Shanghai, China

Print_ISBN

978-1-55752-877-3

Electronic_ISBN

978-1-55752-877-3

Type

conf

Filename

5405472