Abstract

Planar optical waveguides have been formed in strontium barium niobate single crystals by either proton or helium-ion implantation. The profiles of the ordinary and the extraordinary refractive indices are deduced from dark-line mode spectroscopy. Optical barriers with depths to Δne = 2.6% for protons and Δne = 5.5% for helium are obtained. By proton implantation we find a very low intensity loss of 0.4 cm−1 for ordinarily and a higher value of 2.7 cm−1 for extraordinarily polarized light at 632.8 nm. For helium-implanted waveguides both values are ~4 cm−1.

© 1995 Optical Society of America

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