Abstract
Two-photon-resonant excitation of the sodium level can lead to the generation of new frequencies either by amplified spontaneous emission at the transition frequency or by a resonantly enhanced four-wave mixing process. Competition between these two processes has been observed. The four-wave mixing process can suppress amplified spontaneous emission by preventing the excitation of the level due to an interference between two different pathways connecting the ground () and states.
- Received 21 June 1985
DOI:https://doi.org/10.1103/PhysRevLett.55.1086
©1985 American Physical Society