Patent ID: 7016383

Claim:
A laser diode apparatus comprising: a substrate having first and second major surfaces; a plurality of substantially identical, parallel grooves formed in the first major surface of the substrate, wherein each of the grooves has a pair of opposed, parallel side walls and an opening formed in the major surface, and the sidewalls are perpendicular to the major surface and extend from the major surface to bottoms of the grooves, the grooves include at least one heat-emitting groove and at least a pair of cooling grooves, and each of the cooling grooves is open and defines a coolant space that is adapted to accommodate cooling fluid to cool the substrate; and a laser diode bar located in the heat-emitting groove, wherein the laser diode bar has a first side, which is parallel to the side walls of the heat-emitting groove, and a second side, which is opposite to and parallel to the first side; the heat-emitting groove is located between the cooling grooves, such that the laser diode bar is located between the coolant spaces and such that heat will be transferred in a direction parallel to the major surface from the first side of the laser diode bar to one of the coolant spaces and from the second side of the laser diode bar to the other of the coolant spaces.