Abstract
Here we investigate nonlinear optical effects in an atomic gas with a LG03 donut beam. The LG03 donut beam was produced with a Ti: sapphire laser using a computer-generated holograra.1 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 D2 line at 780.1 nm, we obtained resonant enhancement of the nonlinearity.
© 1998 Optical Society of America
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