Second-harmonic generation of blue light in a LiTaO3 waveguide
- 17 June 1991
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 58 (24) , 2732-2734
- https://doi.org/10.1063/1.104769
Abstract
We report blue light generation in a LiTaO3 waveguide by quasi‐phase‐matched (QPM) second‐harmonic generation (SHG). A periodically domain‐inverted structure for QPM is fabricated in LiTaO3 by proton exchange of a selective Ta‐masked area using pyrophosphoric acid followed by heat treatment. By utilizing this structure and low‐loss proton‐exhanged waveguides, we have realized a third‐order QPM‐SHG device. As a result, 0.13 mW of harmonic blue light was generated for a conversion efficiency of 18%/W.Keywords
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