We investigate experimentally and theoretically nondegenerate four-wave mixing in rubidium vapor using a diamond configuration ($5S_{1/2}$, $5P_{1/2}$, $5P_{3/2}$, and $6S_{1/2}$ levels). We model this process of three classical fields interacting with a four-level atomic system with the Schrödinger equation. The experimental results are in good agreement with theoretical predictions for the generated light as a function of detuning.

• Received 16 April 2008

DOI:https://doi.org/10.1103/PhysRevA.78.013834