Patent ID: 8811445

Claim:
A laser diode array comprising: a substrate having an upper surface and a lower surface; a plurality of v grooves formed in the upper surface, each v groove including a first side and a second side perpendicular to the first side; and a plurality of laser diode bar assemblies, wherein a laser diode bar assembly is disposed within each of the v grooves and attached to the first side, wherein the laser diode bar assembly includes: a first adhesion layer disposed on the first side of the v groove; a metal plate attached to the first adhesion layer; a second adhesion layer disposed over the metal plate; and a laser diode bar attached to the second adhesion layer, wherein, the laser diode bar is characterized by a coefficient of thermal expansion (CTE) substantially similar to that of the metal plate; and a monolithic lens array including a plurality of lenses configured to collimate light emitted by the plurality of laser diode bar assemblies, wherein the monolithic lens array is formed on a single substrate; and wherein the plurality of lenses are defocused to compensate for CTE mismatch between the CTE of the laser diode bar and a CTE of the single substrate that forms the monolithic lens array.