Heating with diode lasers allows for targeted, directional and highly controllable non-contact delivery of heat energy to a material and is the latest technology being used for many applications. Diode lasers project infrared, or non-visible, radiation onto specific regions. Heat source options include IR lamps, microwaves, hot air, electric coils, and gas-fired furnaces. However, limitations in CO2 laser reliability and cost of ownership have made their use as a heat treating source less than ideal. Laser heat treatment is the fastest, most efficient, and most cost-effective solution available for applications like battery electrode drying, powder coat. Abstract— By measuring the total energy flow from an optical device, we can develop new design strategies for thermal stabiliza-tion. Here we present a comprehensive model for heat exchange between a semiconductor laser diode and its environment that in-cludes the mechanisms of conduction. Even today's laser heat treatments still follow the classical objectives: The targeted application of heat to defined surface areas alters material properties and protects components from wear and corrosion. Over the last few articles of our little series, we revealed some key areas for the.