Patent ID: 8804783
Filing Date: 2014-08-12
Classification: H01S

Abstract:
1. Apparatus, comprising: a copper heat-sink having a heat-sink surface; a diamond heat-spreader having first and second opposite surfaces and side walls; an optically pumped semiconductor chip (OPS-chip) having a multilayer semiconductor gain-structure surmounting a mirror structure, the minor structure of the OPS-chip being soldered by a hard solder to the second surface of the heat-spreader and with the first surface of the diamond heat-spreader being soldered to the heat sink surface; and a steel frame having a top and a base, a recess in the base having dimensions greater than the dimensions of the diamond heat-spreader, said recess having a peripheral shelf and side walls, said steel frame including an aligned aperture having dimensions smaller than the dimensions of the diamond heat spreader, the diamond heat-spreader being soldered by the hard solder into the recess in the frame with the OPS-chip thereon in the aperture of the steel frame, with the second surface of the heat-spreader being bonded to the peripheral shelf and with the side walls of the heat-spreader being bonded to the side walls of the recess and the base of the steel frame being soldered to the heat sink surface, wherein the bonding of the steel frame to the diamond heat-spreader functions to increase the effective coefficient of thermal expansion (CTE) of the diamond heat-spreader.