Patent ID: 6965628

Claim:
A distributed feedback laser, comprising: a longitudinally extending body including first and second end facets, the body defining a first body portion longitudinally extending between the first end facet and a bifurcation line, and a second body portion longitudinally extending between the second end facet and the bifurcation line, the body comprising: a doped bottom layer; a doped top layer; an active region interposed between said bottom and top layers; and a grating defined in one of said bottom and top layers and extending from the first end facet to the second end facet, the grating including: a first grating portion extending from the first end facet to the bifurcation line, the first grating portion having a periodic tooth structure; a second grating portion extending from the bifurcation line to the second end facet, the second grating portion having a second order tooth structure.