Patent ID: 8897329
Filing Date: 2014-11-25
Classification: B82Y,H01S

Abstract:
1. A Group III nitride-based laser diode comprising a substrate of GaN with a semipolar orientation, an n-side cladding layer formed of n-doped (Al,In)GaN, an n-side waveguide layer formed of n-doped (Al)InGaN, an active region, a p-side waveguide layer formed of p-doped (Al)InGaN, and a p-side cladding layer formed of p-doped (Al,In)GaN, wherein: the active region is interposed between the n-side cladding layer and the p-side cladding layer and extends substantially parallel to the n-side cladding layer and the p-side cladding layer; the active region comprises one or more InGaN quantum wells producing electrically-pumped stimulated emission of photons and having optical gain at a lasing wavelength from 510 nm to 580 nm; the n-side waveguide layer is interposed between the active region and the n-side cladding layer; the n-side waveguide layer has an n-side waveguide layer thickness from 125 nm to 200 nm; the p-side waveguide layer is interposed between the active region and the p-side cladding layer; the p-side waveguide layer has a p-side waveguide layer acceptor concentration less than 3×10 the p-side waveguide layer thickness is from 1 nm to 20% of the n-side waveguide layer thickness; the p-side cladding layer has a p-side cladding layer total thickness of from about 0.5 μm to about 1.5 μm; the p-side cladding layer comprises a first thickness portion and a second thickness portion, the first thickness portion being interposed between the second thickness portion and the p-side waveguide layer; the first thickness portion of the p-side cladding layer has a first-portion thickness of 20 nm to 200 nm and a first-portion acceptor concentration less than 3×10 the second thickness portion of the p-side cladding layer has a second-portion acceptor concentration greater than 3×10