Diffraction-Mode Selection in Heterolasers with Planar Bragg Structures

Abstract

Within the coupled wave method complemented by the quasi-optical approach, the feasibility of diffraction-mode selection over the transverse index in lasers with planar Bragg resonators is studied. Acceptable Fresnel parameters at which the diffraction losses from the Bragg-structure edges provide steady-state single-mode lasing with a narrow angular spectrum are determined. It is shown that the such stable lasing at high Fresnel parameters is achieved by shifting the operating transition frequency to the frequency of the longitudinal mode of a Bragg resonator with the highest Q-factor.