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Electrooptic coefficient measurements in LiTaO3 and LiNbO3 waveguides

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3 Author(s)
T. Suzuki ; Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA ; O. Eknoyan ; H. F. Taylor

The magnitudes of linear electrooptic coefficients r13 and r33 in Zn:LiTaO3 repoled channel waveguides are reported. The measurements were made at 0.633-μm wavelength using a Fabry-Perot interferometer. The waveguides were produced by diffusion from the vapor phase at a temperature above the Curie temperature. For full recovery of the Pockels effect, an electric field of 200 V/cm is needed during repoling. The measured values of r13 and r33 at 32-MHz modulation frequency are 7.2 and 30.3 pm/V, respectively. The difference between unclamped and clamped coefficients is comparable to that from bulk crystals. Measurements were also made on Ti:LiNbO3 waveguides that did not require repoling, and good agreement with bulk crystal values was obtained

Published in:

Journal of Lightwave Technology  (Volume:11 ,  Issue: 2 )