Two Photon Resonantly Enhanced Self-Defocusing in Cs Vapor at 1.06 Micron.
NAVAL RESEARCH LAB WASHINGTON D C
Pagination or Media Count:
The electronic nonlinear refractive index in Cs vapor at 1.06 micrometers is shown to be negative and to consist of two distinct contributions. One of these contricutions arises from a two photon resonance in the susceptibility, and can be made comparable to magnitude to the positive n2 in laser glass. The other term arises from population redistribution between the ground and the first excited state. Preliminary measurements of self defocusing of a single pulse from a NdYAG mode locked laser are presented which are in agreement with the theoretical predictions.
- Atomic and Molecular Physics and Spectroscopy