Loss of optical nonlinearity in proton-exchanged LiNbO3 waveguides
- 20 January 1992
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 60 (3) , 301-303
- https://doi.org/10.1063/1.106692
Abstract
The second‐order optical nonlinearity in a planar waveguide of proton‐exchanged LiNbO3 is directly probed by second‐harmonic generation from 532 to 266 nm in a reflection geometry. Compared to untreated LiNbO3, a 30‐fold reduction in the optical nonlinearity is observed. Contrary to previous reports, we find that the optical nonlinearity cannot be effectively restored by thermal annealing.Keywords
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