NUMERICAL STUDY OF THE STABILITY OF SINGLE-MODE LASING IN A FABRY-PEROT RESONATOR WITH AN ACTIVE MEDIUM

The self-consistent problem of lasing from a Fabry-Perot resonator loa ded with an active medium is considered. The selective iteration metho d recently developed for the diffraction theory of the resonator was a pplied to solve this problem. It allows one to find efficiently both s table and unstable nonlinear modes. A Krylov-type numerical algorithm was used to solve a linear eigenproblem with a frozen laser medium. Th e biorthogonality relations for eigenmodes of a loaded resonator are p resented, The calculations were performed for the Rigrod model and the CO2 flow laser model. The parameter region where single-mode lasing i s stable was found It is shown that a stabilized single-mode lasing ex ists in a gas flow CO2 laser.