Abstract

A novel technique was used to control the spatial overlap of the orthogonal linearly polarized waveguide modes in ultrafast laser inscribed BiB3O6 waveguides. We report that the strain fields induced by the expansion of material in the laser focus can be considered independently in the design of “type II” waveguides guiding orthogonal linearly polarized light. The waveguide with the optimal mode overlap was used for type I birefringently phase-matched second-harmonic generation of a continuous wave laser source at 1047nm.

© 2011 Optical Society of America

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