Patent ID: 9407068
Filing Date: 2016-08-02
CPC Classification: B82Y,H01L,H01S

Claim Text:
1. A monolithic quantum cascade (QC) laser structure, comprising: a plurality of QC active region layers formed with a common material, where each of the QC active region layers has a different thickness; a plurality of cladding layers vertically interleaved with the plurality of QC active region layers such that the plurality of cladding layers and the plurality of QC active region layers are individually alternating and a pair of the plurality of cladding layers bound each of the plurality of QC active region layers; and a substrate layer supporting and contacting a lowest one of the plurality of cladding layers; wherein each of the QC active region layers bounded by the pair of the plurality of cladding layers is etched to laterally isolate an QC active region layer portion between an upper bounding cladding layer portion and a lower bounding cladding layer to form a separately addressable one of a plurality of QC lasers.