Abstract

Although surface-normal emission from a laser using a one-dimensional second-order grating has been published for some time [1], it is only in the last few years that the theory of circular (i.e. two-dimensional) gratings has been considered theoretically [2-4]. Last year lasing in an optically-pumped circular grating structure was observed [5]. Here we report for the first time lasing at room temperature in an electrically-pumped circular grating laser.

© 1992 Optical Society of America