Opto Power Corp. is offering diode laser heat sinks with a single array bar as part of the water-cooled Monsoon series. On these heat sinks, diode laser bars produce 50 W continuous wave with output wavelengths from 790 to 950 nm. Water cooling limits the bar temperature necessary for high-average-power operation. The Monsoon was originally designed as a modular heat sink that can be combined in horizontal, vertical or two-dimensional stacks. A heat sink coupled with a multibar module is suitable for pumping laser crystals and materials processing applications. The devices are available as a single array as well as in several standard stacked array packages.