We study the enhanced Kerr-nonlinear coefficient in a three-level A-type atomic system for various coupling-beam powers. The Kerr-nonlinear coefficient behaves very differently in the strong and the weak coupling power regions and changes sign when the coupling or probe frequency detuning changes sign. Comparisons of Kerr-nonlinear coefficients as functions of probe frequency detuning, coupling power, and coupling frequency detuning are presented.
© 2002 Optical Society of America
(030.1670) Coherence and statistical optics : Coherent optical effects
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(160.4330) Materials : Nonlinear optical materials
(190.3270) Nonlinear optics : Kerr effect
Hai Wang, David Goorskey, and Min Xiao, "Dependence of enhanced Kerr nonlinearity on coupling power in a three-level atomic system," Opt. Lett. 27, 258-260 (2002)