  Nonlinear periodically poled ridge LiNbO3 waveguides have been fabricated on
silicon substrates. Components are carved with only use of a precision dicing
machine without need for grinding or polishing steps. They show efficient
second harmonic generation at telecommunication wavelengths with normalized
conversion reaching 204%/W in a 15 mm long device. Influence of geometrical non
uniformities of waveguides due to fabrication process is asserted. Components
characteristics are studied notably their robustness and tunability versus
temperature.
