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  • Title: Generation of high-power blue light in periodically poled LiNbO(3).
    Author: Ross GW, Pollnau M, Smith PG, Clarkson WA, Britton PE, Hanna DC.
    Journal: Opt Lett; 1998 Feb 01; 23(3):171-3. PubMed ID: 18084449.
    Abstract:
    We report the generation of 450-mW average blue (473-nm) power by frequency doubling of a diode-pumped 946-nm Nd:YAG laser. We achieved pulsed operation at a high repetition rate (~160kHz) by driving the relaxation oscillations of the laser. A 40% conversion efficiency to the second harmonic was obtained in a single-pass, extracavity, first-order, quasi-phase-matched process in which periodically poled lithium niobate (period 4.5microm , thickness 0.5mm , and length 15mm) at 140 degrees C was used. The resulting high-power blue beam was circular in profile and nearly diffraction limited, indicating that photorefractive effects do not appear to limit device performance.
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