Abstract

We report for what is believed to be the first time planar waveguide formation and propagation mode reduction in Nd:YVO4 crystal, which were achieved by 3.0-MeV silicon-ion implantation followed by annealing under specific conditions. After the implantation, an enhanced refractive-index region was formed with a width of 2 µm beneath the sample surface to act as a waveguide structure. We found that there were four propagation modes for the as-implanted Nd:YVO4 waveguide, whereas after annealing at 240–360 °C for several hours the number of modes could be reduced to three, two, and one. After annealing at 400 °C for 1 h the monomode waveguide was destroyed completely, and no mode was observed in the sample.

© 2002 Optical Society of America

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