Abstract: A laser bar structure is mounted on a submount which includes first and second side surfaces. The first side surface has an electrically-conducting elongated mesa adjacent to the rear surface defining a placement space for a laser bar. A conducting foil connects the laser bar to the mesa. A plurality of such submounts are stacked such that the rise of the mesas provide room for the lasers and the connections to them. Each submount has a through conduit which align when stacked to form a coolant manifold. The rear surface of the stack is mounted on a microchannel cooler. A single array or a plurality of arrays are assembled electrically in series between heat conducting end blocks with fittings for connection to a coolant supply.

Abstract: A mounting module for a laser diode array has a microchannel heat sink assembly and a circulation means for flowing a cooling fluid to and from the microchannel heat sink so as to dissipate heat. The microchannel heat sink has a plurality of internal microchannels, and has an external planar surface to affix laser diode submounts which facilitate attachment of laser emitting bars. The circulation mans comprises a housing having canals which circulate the cooling fluid. The housing has an external surface to which an electrical distribution means is placed, the distribution means providing electrical power to the laser diode array.