Quasi-phase matched second-harmonic generation through thermal poling in femtosecond laser-written glass waveguides.
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 x10(-5) %/W-cm(2) was obtained for a 1 cm long device, corresponding to an effective nonlinear coefficient of 0.0075 pm/V.
Li
Guangyu
G
Currently with Electro-Scientific, 13900 NW Science Park Drive, Portland, OR 97229, USA.
Winick
Kim A
KA
Said
Ali A
AA
Dugan
Mark
M
Bado
Philippe
P
D005898:Glass; D007834:Lasers; D008027:Light; D008420:Manufactured Materials; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation; D013696:Temperature