Abstract
Phase matching temperatures for second harmonic generation were measured for fundamental wavelengths from 1.06 to 1.24 μm in a planar waveguide and compared with bulk crystal values. Furthermore, both second harmonic generation and sum frequency generation were achieved in a channel waveguide, the latter by mixing the Nd-YAG laser wavelength at 1.064 μm with Raman-shifted light from the same light source. A conversion efficiency for second harmonic generation in a channel waveguide of 4.2% at a fundamental power of 120 mW was obtained. Some material-related aspects on waveguides for this type of application are also discussed.
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