808nm Laser Diodes 20W output with passive cooling

Osram Opto Semiconductors has developed an air-cooled version of the Sirilas laser diode for mobile applications that require less output and no water cooling. The compact module contains a laser bar comprising 16 individual emitters. The modules can be integrated in diode laser arrays, with the emitters individually replaceable in case of failure. Normal circulating air and fans or thermoelectric coolers offer sufficient cooling for these laser diodes to operate. The heat sink consists of solid copper material with high thermal conductivity. An integrated lens produces an almost parallel beam with a typical vertical divergence of 1.5° (full angle). The air-cooled version is used for pumping compact, solid-state lasers of low-to-medium output. With a wavelength of 808nm, it is suitable for neodym-doped, solid-state lasers (Nd-YAG). These are used in marking or engraving applications, mobile medical equipment for ophthalmology and dentistry as well as in the consumer sector for cosmetic treatment. Chips with 800 to 1000nm wavelengths can also be integrated in the package.