Abstract

We report on how the optical and structural properties of Nd:YAG proton beam written waveguides are modified when they experienced annealing treatments from 50°C to 950°C. The microstructural changes caused in the vicinity of the nuclear damage region were found to be stable up to 700°C, so that higher annealing temperatures lead to a complete waveguide erasing. Before this “erasing” temperature, the partial thermal-induced defect recombination reduces the propagation losses, reaching its minimum value (below 1dB/cm) after a 400°C thermal annealing.

© 2011 Optical Society of America

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