The FWM interaction transfer matrix for a self-adaptive laser resonator is
deduced. The laser oscillator considered is made of a plane output coupler
and an infinite nonlinear FWM medium in a self-intersecting loop geometry.
This matrix can be used in different complex configurations to study the sp
atial evolution of a Gaussian beam. (C) 2000 Elsevier Science B.V. All righ
ts reserved.