Patent ID: 7813400

Claim:
A laser diode, comprising: a first separate confinement heterostructure; an active region on said first separate confinement heterostructure; a second separate confinement heterostructure on said active region; one or more epitaxial layers on said second separate confinement heterostructure comprising a first waveguiding element; and a ridge formed in said epitaxial layers and a first mesa around said ridge, said first mesa having a mesa height of 0.1-0.2 μm above said second confinement heterostructure; a second waveguiding element, said active region and first and second separate confinement heterostructures between said first and second waveguiding elements; an n-contact layer adjacent said second waveguiding element; a compliance layer comprising n-type material between said n-contact layer and said second waveguiding element; and an electron blocking layer between said active region and said second separate confinement heterostructure.