Abstract
Recently a simple transmission method for phase-sensitive optical heterodyne detection of rf-induced sublevel coherence was successfully applied in dilute solids at low tem- perature.1,2 The technique extends previous methods in optical-pumping double resonance3 and relies on a coherent Raman process being stimulated by a resonant pulsed or cw radio-frequency field and an optical field. It has been predicted2 that the corresponding Raman heterodyne signal generally contains amplitude-modulation (AM) and frequency-modulation (PM) sideband contributions, where the AM is supposed to dominate in the optically resonant case and the FM in the nonresonant case.
© 1984 Optical Society of America
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