Broadly Tunable Near-Infrared Six-Wave Mixing Processes in Potassium Vapor

摘要

We report the observation of several six-wave mixing processes which result inbroadly tunable coherent emission in the wavelength range 1.20-1.45 micrometers. These emissions are produced in potassium vapor which is simultaneously pumped by two pulsed dye lasers. One set of processes is produced when the frequency of the first laser is fixed to the potassium 4S to 6S two photon transition frequency, while the frequency of the second laser is tuned. The second set of processes is observed when both lasers are tuned, but with their sum frequency fixed to the 4S to 6S two-photon transition. Peak output energies of 10nJ/pulse have been observed.