Generation of high-power blue light in periodically poled LiNbO3

Graeme W. Ross, Markus Pollnau, Peter G.R. Smith, W. Andrew Clarkson, Paul E. Britton, David C. Hanna

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    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 (~160 kHz) 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 4.5 mm, thickness 0.5 mm, and length 15 mm) at 140 ±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.
    Original languageUndefined
    Pages (from-to)171-173
    Number of pages3
    JournalOptics letters
    Issue number3
    Publication statusPublished - 1998


    • IOMS-APD: Active Photonic Devices
    • IR-70105
    • EWI-17571

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