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Second-harmonic generation in He+-implanted gadolinium calcium oxoborate planar waveguides

A. Boudrioua, J. C. Loulergue, P. Moretti, B. Jacquier, G. Aka, and D. Vivien

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Abstract

What is believed to be the first investigation of second-harmonic generation (SHG) in Ca4GdOBO33 waveguides is reported. A planar waveguide was formed by 2-MeV-helium implantation. We cut the sample to achieve type I noncritical phase matching of an 823-nm fundamental wave for fundamental light propagating along the y axis and polarized along the z crystallophysic axis of the crystal. SHG was achieved with a relatively low pumping power of a cw Ti:sapphire laser. The results indicate that the nonlinearity of the material remains in the guiding region after ion implantation.

© 1999 Optical Society of America

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