Quantum Theory of Multiwave Mixing. VI. Effects of Quantum Noise on Modulation Spectroscopy

摘要

Treating the weak sideband fields quantum mechanically, the effects are studied of quantum noise on amplitude modulation and frequency modulation spectroscopy of two level media. The analysis demonstrates that quantum noise affects not only the intensities of the modulation sidebands but also their relative phase, which leads in particular to a quantum limit for frequency modulation spectroscopy. (Reprints)