Direct diode laser due to their high efficiency, small size, and potential for low cost will be the future of industrial lasers. There has been many novel applications described for high power direct diode laser [HPDDL] systems but few have been implemented in extreme production environments due to diode and diode system reliability. We discuss several novel applications in which the HPDDL have been implemented and proven reliable and cost-effective in production environments. These applications are laser hardening / surface modification, laser wire feed welding and laser paint stripping. Each of these applications uniquely tests the direct diode laser and addresses their reliability in production environments. A case by case comparison of the advantages direct diode laser versus traditional industrial lasers such as CO2 and Nd:YAG and non-laser technologies such a RF induction, TIG, MIG, and plasma for each of these production application is presented, which led to the justification for using HPDDL in production..

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