POWER SPECTRUM OF LIGHT SCATTERED BY A STRONGLY DRIVEN MORSE OSCILLATOR

We evaluate the power spectrum of light scattered by a weakly nonlinear Morse oscillator driven by a strong single-mode classical electromagnetic field, taking radiation damping into account as the only relaxation process. The spectrum is calculated in the small-noise limit under a near-resonant condition (the resonance is considered in terms of an effective detuning parameter). We show that the single-peak structure that appears in the weak-field limit splits into a symmetric doublet centering around the driving field frequency in the presence of an intense field when the Rabi frequency far exceeds the natural damping rate. © 1990 The American Physical Society.