Patent ID: 7848375

Claim:
A laser die, comprising: a substrate; a base epitaxial portion grown on the substrate, wherein the base epitaxial portion includes: an active region positioned above the substrate; a first confinement layer positioned above the active region; a second confinement layer positioned above the first confinement layer; and a first spacer layer positioned above the second confinement layer; a first spacer layer positioned above the second confinement layer; a mesa portion; first and second facets, wherein at least one of the first and second facets is flared such that an area of the facet is increased; a mode modifier layer positioned above the substrate; a buffer layer positioned above the mode modifier layer; a third confinement layer positioned above the buffer layer; a fourth confinement layer positioned above the third confinement layer and below the active region; an etch stop layer positioned above the first spacer layer; a second spacer layer positioned above the etch stop layer; a grating layer positioned above the second spacer layer; and a top layer positioned above the grating layer and below the mesa.