Patent ID: 8982921
Filing Date: 2015-03-17
Classification: H01L,H01S

Abstract:
1. An edge-emitting optical semiconductor device, comprising: a substrate; a first active multiple quantum well (MQW) region formed on the substrate; and a first ridge waveguide extending in substantially a longitudinal direction between a first waveguide first etched end facet and a first waveguide second etched end facet, the first ridge waveguide formed in a surface of the substrate over the first active MQW region, the first waveguide first and second etched end facets having optical coatings; wherein the first waveguide first etched end facet is disposed in a first window, and the first waveguide second etched end facet is disposed in a second window, the first and second windows extending in a depth direction from the first ridge waveguide to the substrate and through the first active MQW regions, the first window having a first window pair of alcoves, the first waveguide first etched end facet extending between the first window pair of alcoves, the second window having a second window first pair of alcoves, the first waveguide second etched end facet extending between the second window first pair of alcoves.