Abstract: Surface modifications and coating materials are provided that may be applied to a substrate to reduce or eliminate damage that would accrue to do environmental effects or operational stress when incorporated into a device such as a heat exchanger. Structured ceramic surface modification materials may be incorporated into the surface modification and may optionally include a gradient in one or more physical or chemical property.

Abstract: Protection from current and voltage spikes is provided for a laser array by attaching a reverse diode laser array to shared contact pads before the first laser array is bonded to those pads. The arrangement provides for surge protection even during fabrication of the laser package where device failure results from power surges before surge protection circuitry is in place. Surge protection is afforded by having a reverse diode of the reverse diode array electrically in parallel with a corresponding laser diode of the protected array when activated.

Abstract: A laser diode structure includes a metallic gasket which is sandwiched between the laser diode submount and the backside electrode in the absence of solder interfaces. The gasket has mirror image, shallow recesses in the surfaces thereof with each surface having the general shape of a wing. The recesses are formed into sealed coolant conduits when the several layers are bonded together into an integrated structure. The narrow end of each recess communicates with an aperture through the adjacent layer to provide inlet and outlet ports for the coolant. The gasket has an aperture therethrough at the wide ends of the recesses for the coolant to circulate. The gasket can be formed from a single layer or from two layers each with a single recess.

Abstract: An assembly of simple, like laser diode submounts or laser diode bars lend themselves to volume manufacturing techniques. Individual diodes, or diode bars are supported on electrically-insulating submounts which have electrically-isolated metallizations applied thereto for mounting on a single insulating plate and to one another in a stack and for mounting to a common heat sink.