Rapid thermo-optical quality assessment of laser gain media

We describe a technique for the quick and simple assessment of doped optical materials for use as laser gain media. To demonstrate this technique, referred to as Rapid Thermo-Optical Assessment (RTOA), we analyze a set of ceramic and crystalline Yb:YAG samples. RTOA is based on Shack-Hartmann wavefront sensing and thermal lensing to evaluate the media’s thermal response, giving a relative overall quality assessment of the material. The technique is also broadly applicable to optical media considered for high power or thermal loading conditions, and useful for the refinement of fabrication methods. ©2015 Optical Society of America OCIS codes: (140.6810) Thermal effects; (140.3380) Laser materials; (350.6830) Thermal lensing; (350.5340) Photothermal effects. References and links 1. A. W. AlShaer, L. Li, and A. Mistry, “The effects of short pulse laser surface cleaning on porosity formation and reduction in laser welding of aluminum alloy for automotive component manufacture,” Opt. 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