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Enhanced SHG power using periodic poling of and vinylidene cyanide/vinyl acetate copolymer

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4 Author(s)
Y. Azumai ; Dept. of Electr. Eng., Nat. Defense Acad., Yokosuka, Japan ; K. Kishimoto ; I. Seo ; H. Sato

Embedding poling-inverted corrugation of the optical nonlinear susceptibility into vinylidene cyanide/vinyl acetate organic copolymer, the second-harmonic (SH) power has been enhanced at pulsed Nd:YAG 1.06 μm and Er:YAG 2.94 μm laser lines by quasi-phase matching (QPM) the interaction between the fundamental and SH waves. Using a sample with a corrugation period of 120 μm with poling corrugated by an interdigital electrode, an enhancement factor of about 94 and ~3 was obtained at 1.06 μm and 2.94 μm, respectively, in comparison with a bulk sample having uniform poling. Taking the first-order QPM, the maximum conversion efficiency was also about 0.001 percent at the wavelength λω=1.06 μm, with the fundamental peak power Pω of 2.5 W, and the extinction coefficients of αω=0.7 mm-1 in the film having a path length of 2.4 mm, while ~0.03 percent at λω=2.94 μm with Pω=200 W, and αω=1.4 mm-1 and α=0.7 mm-1 for the same film

Published in:

IEEE Journal of Quantum Electronics  (Volume:30 ,  Issue: 8 )