DILAS (Mainz, Germany) offers water-cooled laser diodes for alkali laser pumping at 766nm, 780nm, and 852nm on micro-channel heat sinks at CW power levels of 40W, 60W, and 100W, respectively. The laser bar geometry has a 1cm bar width, with 19 emitters on a 500μm pitch. Typical power conversion efficiency is in the range of 56% at rated power for all three wavelengths, as measured at 20C. The diodes are assembled in watercooled stacks to power scale up to kW levels, according to customer requirements. Diode laser stack arrays can also be offered with volume Bragg gratings (with standard or low reflectivity coatings), and with both optical axes collimated.
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