FREQUENCY-MODULATION OPTICAL-OPTICAL TRIPLE-RESONANCE OPTICAL HETERODYNE SPECTROSCOPY

We propose new frequency-modulation optical-optical triple-resonance (FM-OOTR) op-tical heterodyne spectroscopy, which can eliminate the Doppler-background in the recently developed optical-optical triple-resonance (OOTR) spectroscopy and provide improved reso-lution and sensitivity. Theoretical considerations and line shape calculations are presented. The potential applications of FM-OOTR technique to laser frequency stabilization with sig-nificant advantages can be expected.