Abstract

Considerable attention has been given recently to the surface-emitting DBR lasers with circular grating¹. These structures are of interest primarily because they can deliver high-power and low-divergence beam of circular symmetry. They consists of active region and first-order grating DBR resonator surrounded by independent outcoupling grating which focuses emitting light (see Fig. 1). The grating outcoupler is described by the complex reflectivity at the end of first-order grating (r = R₁) responsible for feedback.

© 2000 IEEE