Large electro-optic coefficient observed in ion-exchanged potassium titanyl phosphate waveguides

Yi Chiu; Daniel D. Stancil; Tuviah E. Schlesinger

doi:10.1117/12.239648

10 May 1996 Large electro-optic coefficient observed in ion-exchanged potassium titanyl phosphate waveguides

Yi Chiu, Daniel D. Stancil, Tuviah E. Schlesinger

Proceedings Volume 2700, Nonlinear Frequency Generation and Conversion; (1996) https://doi.org/10.1117/12.239648
Event: Photonics West '96, 1996, San Jose, CA, United States

Abstract

We report the observation of an anomalously large electro-optic coefficient in potassium titanyl phosphate (KTiOPO₄, KTP) waveguides fabricated under various conditions. An interferometric method was used to measure the effective electro-optic coefficient r₃₃ in the waveguides by measuring the phase retardation of an optical mode when a voltage is applied across the substrate. We observe that at low frequency the waveguide electro-optic coefficient can be higher than the bulk value by a factor up to about 100. Since KTP crystals are known to have a high concentration of mobile ions, a model relating the mobile charges, space charge fields, and observed enhancement in r₃₃ is proposed to explain the mechanism of this effect. Possible device application and long term effects on system operation are also discussed.

Citation Download Citation

Yi Chiu, Daniel D. Stancil, and Tuviah E. Schlesinger "Large electro-optic coefficient observed in ion-exchanged potassium titanyl phosphate waveguides", Proc. SPIE 2700, Nonlinear Frequency Generation and Conversion, (10 May 1996); https://doi.org/10.1117/12.239648

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