F. Saif et al., Quantum theory of a micromaser operating on the atomic scattering from a resonant standing wave - art. no. 043812, PHYS REV A, 6404(4), 2001, pp. 3812
We study the amplification of a resonant standing-wave light field due to t
he interaction with a beam of monovelocity two-level atoms moving in the Ra
man-Nath regime and in the Bragg regime. The atomic density is low so that,
at most, one atom is inside the cavity at a time. This system is very simi
lar to the well-known micromaser but it is operating in the optical region
of the field frequencies. Therefore, the situation corresponds to a microla
ser, Unlike the micromaser system, the momentum transfer between the atoms
and photons in the microlaser essentially effects the center-of-mass motion
of the atoms and the evolution of the field.