Title :
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
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;
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
