Hexagonal-Facet Laser with Optical Waveguides Grown by Selective Area Metalorganic Chemical Vapor Deposition

Abstract

A hexagonal facet (HF) GaAs/AlGaAs laser with rectangular optical waveguides is proposed and its preliminary lasing characteristics are presented. The rectangular waveguide is parallel to one side of the HF laser and consists of the same (111)B growth plane and (110) sidewall facets as the HF laser structure. The number of rectangular waveguides extending from one HF laser is changed from one to four to study the effect of the waveguide on lasing characteristics by optical pumping at room temperature. The lasing light can be efficiently taken out from the point of the rectangular waveguides in all laser structures. These lasers keep a ring cavity mode of inscribed hexagon even if the waveguide structures couple with the HF laser structure.