Patent ID: 6574256
Filing Date: 2003-06-03
Classification: B82Y,H01S

Abstract:
A distributed feedback laser, comprising:a substrate material; an active layer having an alloy of gallium nitride; a first waveguiding layer, including gallium nitride or an alloy of gallium nitride, including at least one of aluminum and indium, on a first side of the active layer; a first cladding, including gallium nitride or an alloy of gallium nitride, including at least one of aluminum and indium, on a second side of the first waveguiding layer; a second waveguiding layer, including gallium nitride or an alloy of gallium nitride, including at least one of aluminum and indium, on a second side of the active layer; a tunnel barrier layer between the active layer and at least one of the waveguiding layers with the active layer and the tunnel barrier layer being periodically corrugated to form a periodic grating for providing distributed optical feedback; a second cladding, including gallium nitride or an alloy of gallium nitride including at least one of aluminum, and indium, on a second side of the waveguiding layer.