Generation of high-power blue light in periodically poled LiNbO3


Ross, Graeme W. and Pollnau, Markus and Smith, Peter G.R. and Clarkson, W. Andrew and Britton, Paul E. and Hanna, David C. (1998) Generation of high-power blue light in periodically poled LiNbO3. Optics Letters, 23 (3). pp. 171-173. ISSN 0146-9592

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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 (~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.
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Copyright:© 1998 Optical Society of America
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