Abstract

Quantum interference for atomic two-photon excitation has been exploited in an experiment which demonstrates phase-sensitive demodulation of optical fields separated by an interval of ±12THz. We have explored applications of this capability to frequency metrology which utilize the atom as a nonlinear mixing element to compare unknown “target” to known “reference” frequencies and which should provide the capability for dense coverage of the optical and near 1R spectrum

© 1996 Optical Society of America