A theoretical analysis of absorptive optical bistability in a passive atomi
c medium and bidirectional lasing in an active atomic medium is presented.
The atomic medium consists of a collection of cold two-level atoms and the
atom-radiation field interaction is described using a one-dimensional semic
lassical model. It is shown that when the effects of atomic recoil are incl
uded self-consistently, the interaction between the atoms and the radiation
can be changed significantly from that when the effects of atomic recoil a
re neglected. (C) 2000 Elsevier Science B.V. All rights reserved.