Abstract

Because of the possibility of longitudinal and transverse mode control as well as the compatibility of corrugation process with the planar technology GaAs distributed feedback (DFB) laser has attracted dozens of workers in the field of integrated optics. And this resulted in the recent successful room temperature cw operation of GaAs DFB injection lasers.⁽¹⁾ But our study indicates that the introduction of corrugation at or near the active region of a laser could seriously limit its lifetime. Distributed Bragg reflector (DBR) lasers which have corrugations outside of the active region and still preserve most of the merits of DFB lasers seem to be an answer to this problem. Theoretical analysis of DBR lasers has been done by several people.^(2-4) Room temperature operation of GaAs laser using one cleaved end face and one Bragg reflector was demonstrated by Reinhart et al.⁽⁵⁾ In this paper we report optically pumped GaAs waveguide lasers with two Bragg reflectors operating at 77°K.

© 1976 Optical Society of America