Abstract
We report on the observation of enhanced four-wave mixing via crossover resonance in a Doppler-broadened cesium vapor. Using a single laser frequency, a resonant parametric process in a double-Λ level configuration is directly excited for a specific velocity class. We investigate this process in different saturation regimes and demonstrate the possibility of generating intensity correlation and anticorrelation between the probe and conjugate beams. A simple theoretical model is developed that accounts qualitatively well to the observed results.
© 2011 Optical Society of America
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