Phase conjugation in the gain saturation of a flashlamp pumped dye laser

Michael Gassmann, Horst Weber

Richard H. Knipe

R. Krishna Mohan, Chinnia Subramanian

Tomohiro Hirose, Takashige Omatsu, Hirofumi Watanabe +1 more

Shigeki Miyanaga, Hirofumi Fujiwara

P.A. Routledge, Terence A. King

Phase conjugation has been observed in an amplifying medium of rhodamine 6G dye molecules in solution, excited either by flashlamps or by a laser. It is found that the mechanism involved in phase conjugation is degenerate four-wave mixing through gain saturation, and reasonable agreement obtained with the theory of saturable amplifiers. A phase-conjugate signal was observed over the tuning range of the dye system (580–605 nm) and a reflectivity up to a maximum of 25% was obtained.