Adiabatic Following and the Self-Defocusing of Light in Rubidium Vapor
The narrow-line output of a dye laser on the low-frequency side of 2P1/2 resonance line (7948 Å) of rubidium was self-defocused by passage through dilute rubidium vapor. The defocusing was caused by the electronic nonlinearity associated with adiabatic following of the laser field by the pseudomoment of the resonant atoms. Using the corresponding nonlinear dielectric constant, the wave equation was solved numerically and gave excellent quantitative agreement with experiment.
KeywordsLaser Field Precession Frequency Resonant Atom Rubidium Vapor Electronic Nonlinearity
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