Maximum uptime and minimum focus shift in high-power 1µm laser beam delivery

T. Kugler

doi:10.1117/12.908830

6 February 2012 Maximum uptime and minimum focus shift in high-power 1μm laser beam delivery

T. Kugler

Proceedings Volume 8239, High Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications; 82390X (2012) https://doi.org/10.1117/12.908830
Event: SPIE LASE, 2012, San Francisco, California, United States

Abstract

High Power (3kW to 20kW) 1um lasers can show problems related to thermal focus shift, optical contamination, and subsequent optical damage if not designed and maintained properly in production. Other issues are related to correct optical assembly and optic orientation in the beam delivery system. Even low to medium power lasers can have problems where the power density on the optics becomes excessive, especially where single mode lasers are employed. This paper discusses methods and hardware developed to minimize thermal focus shift in medium and high power beam delivery by first analyzing the standard issues and measuring improvements by the use of proper designs with reflective and transmissive systems by employing seals, active purge, optimized layouts, and direct-cooled optics.

Citation Download Citation

T. Kugler "Maximum uptime and minimum focus shift in high-power 1μm laser beam delivery", Proc. SPIE 8239, High Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications, 82390X (6 February 2012); https://doi.org/10.1117/12.908830

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