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 to . The microstructural changes caused in the vicinity of the nuclear damage region were found to be stable up to , 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 ) after a thermal annealing.
© 2011 Optical Society of America
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