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Something Old, Something New: German Lab Marries Ring and Disk

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Breck Hitz

One of the prime patents on the nonplanar ring oscillator (NPRO) expired last month, an occasion its inventors celebrated with a small party. On the other hand, the thin-disk laser is just beginning its career in the commercial marketplace. Scientists at the University of Applied Sciences Münster in Steinfurt, Germany, are trying to achieve the best of both worlds -- and to generate up to 7 W of single-frequency power -- by diffusion-bonding a thin Nd:YAG disk to an undoped YAG NPRO. The NPRO, developed at Stanford University in California in the 1980s by Robert L. Byer and Thomas J. Kane,...Read full article

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    Published: September 2004
    energyNd:YAGnonplanar ring oscillatornsterResearch & Technologysingle-frequency powerTech PulseUniversity of Applied Sciences MüYAG NPRO

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