The emission spectrum of strongly driven two-level atoms in a cavity is calculated outside the adiabatic approximation; i.e., the ratio of the cavity resonance width to the atomic natural linewidth is left arbitrary. This nonadiabaticity changes the character of the spectrum in a significant way.

• Received 19 September 1989

DOI:https://doi.org/10.1103/PhysRevA.41.2886