Title :
Vortex-beam-induced lensing of off-resonance probe beam in Rb vapor
Author :
Truscott, A.G. ; Friese, M.E.J. ; Rubinsztein-Dunlop, H. ; Heckenberg, N.R.
Author_Institution :
Dept. of Phys., Queensland Univ., Australia
Abstract :
Summary form only given.We investigate nonlinear optical effects in an atomic gas with a LG/sub 03/ donut beam. The LG/sub 03/ donut beam was produced with a Ti:sapphire laser using a computer-generated hologram. The nonlinear medium was Rb atomic vapor in a cylindrical Pyrex cell 10 cm long and 2.5 cm in diameter, heated to approximately 120 C. The power of the donut beam at the cell window was 450 mW. By tuning the laser frequency close to the Rb atomic D/sub 2/ line at 780.1 nm, we obtained resonant enhancement of the nonlinearity. As the laser frequency was tuned through the Rb D/sub 2/ line, we could monitor self-focusing and defocusing on either side of the atomic transition.
Keywords :
laser beams; laser tuning; optical self-focusing; resonant states; rubidium; thermal blooming; vortices; 10 cm; 120 C; 2.5 cm; 450 mW; LG/sub 03/ donut beam; Rb; Rb D/sub 2/ line; Rb atomic D/sub 2/ line; Rb atomic vapor; Rb vapor; Ti:sapphire laser; atomic gas; atomic transition; cell window; computer-generated hologram; cylindrical Pyrex cell; defocusing; donut beam; laser frequency tuning; nonlinear medium; nonlinear optical effects; nonlinearity; off-resonance probe beam; resonant enhancement; self-focusing; vortex-beam-induced lensing; Atom lasers; Atom optics; Atomic beams; Frequency; Gas lasers; Laser beams; Laser tuning; Nonlinear optics; Probes; Resonance;
Conference_Titel :
Quantum Electronics Conference, 1998. IQEC 98. Technical Digest. Summaries of papers presented at the International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
1-55752-541-2
DOI :
10.1109/IQEC.1998.680510
