Depth profile of the nonlinear optical susceptibility of ion-implanted KNbO3 waveguides
- 7 August 1995
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 67 (6) , 748-750
- https://doi.org/10.1063/1.115213
Abstract
We report on the depth profile of the nonlinear optical susceptibility in ion‐implanted potassium niobate (KNbO3) waveguides using reflected second harmonic generation from wedged samples. After irradiation the waveguide layer exhibits partial loss of its optical nonlinearity that can be recovered to better than 90% of its value of the virgin crystal by subsequent annealing and repoling. We propose microscopic depolarization due to ion implantation to be responsible for the observed decrease of the nonlinear optical susceptibility.Keywords
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