Degenerate Four Wave Mixing In Cesium Vapor
Randall J. St. Pierre, Alexander B. Horwitz, J C. Brock
The work reported here demonstrates for the first time degenerate four wave mixing (DFWM) phase conjugation in cesium (Cs) atomic vapor. The strong, spectrally narrow transition of cesium at 852 nm gives conjugate reflectivities up to 154% with low pump beam powers. Temperature tuning of the DFWM response over a 30 GHz bandwidth is also demonstrated. An improved experimental design to determine the DFWM angular response shows a field-of-view of 20 mrad at the half response points. Self-focusing effects are observed to be similar to those in sodium vapor with an onset of increased conjugate divergence for reflectivities greater than about 25%.
Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Apr 8, 1988•3 citations