Thermal-motion-induced optical switching with standing-wave coupled atom-cavity system

摘要

We report an experimental scheme of three-channel all-optical switching based on the conversion between single and double dark states in an atom-ring-cavity system driven by a coherent standing-wave coupling field. By turning on and off the counter-propagating part of the coupling field, the switching for the probe field at three different frequencies is simultaneously achieved. We give a theoretical interpretation to the experimental results via the intracavity susceptibility for thermal atoms at different velocities. The switching performance is experimentally analyzed by introducing an additional coherent pumping light. (C) 2019 Optical Society of America