AlGaAs/GaAs Multiquantum Well Lasers with Buried Multiquantum Well Optical Guide

Abstract

Transverse mode stabilized AlGaAs/GaAs multiquantum well (MQW) lasers with buried MQW optical guide (MQW-BOG) have been fabricated utilizing Zn-diffusion-induced disordering of AlGaAs/GaAs MQW. Lasers with such an optical guide structure operate in the fundamental transverse mode up to an output power as high as 30 mW. A small kink is observed in the L-I curve at an output power exceeding 30 mW. Above the kink, a twin peak appears in the far-field pattern while a single peak appears in the near-field pattern. From these results, it is confirmed that the MQW-BOG laser acts as an index guided laser with partial gain-guided effect.