Journal
OPTICS EXPRESS
Volume 17, Issue 11, Pages 9442-9453Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.17.009442
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Quasi-phase matched second-harmonic generation at 532 nm is demonstrated in a channel waveguide that is written in bulk fused silica using a femtosecond laser. The second-order nonlinear grating is fabricated using uniform thermal poling followed by periodic erasure inside an e-beam deposition system caused, by what we believe to be, x-rays. A SHG conversion efficiency of 2 x 10(-5) %/W-cm(2) was obtained for a 1 cm long device, corresponding to an effective nonlinear coefficient of 0.0075 pm/V. (C) 2009 Optical Society of America
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