Patent ID: 9379522
Filing Date: 2016-06-28
CPC Classification: H01L,H01S

Claim Text:
1. A method for fabricating an optical device comprising: providing a gallium and nitrogen containing substrate including a surface region and a first lattice constant; forming a strained region overlying the surface region, the strained region having a second lattice constant, the second lattice constant being larger than the first lattice constant; forming a strain control region having a third lattice constant, the third lattice constant being substantially equivalent to the second lattice constant, the strain control region being configured to maintain at least a quantum well region within a predetermined strain state; forming an optical confinement region overlying the strain control region; and forming a plurality of quantum well regions overlying the optical confinement region, each of the plurality of quantum well regions having a fourth lattice constant, the fourth lattice constant being substantially equivalent to the second lattice constant, whereupon the strain control region has a higher bandgap than the strained region and the quantum well regions.