A diode laser apparatus includes a plurality of laser bars, each laser bar having an emission direction and a beam path. The first decoder decodes the first video encoded data at a first speed to generate a first video. Embodiments of the heat cycle detection unit comprise a temperature or atmospheric pressure responsive element, a detection module, data interface, and data memory. The bottom surface of the base of the upper travel cooler rests upon the bottom surface of the base of the lower travel cooler.