Determination of thermooptic coefficients in PE: and APE:LiNbO3 strip waveguides for phase compensated applications

Andreas S. Rasch; Matthias Rottschalk; Wolfgang Karthe

doi:10.1117/12.185105

25 August 1994 Determination of thermooptic coefficients in PE: and APE:LiNbO3 strip waveguides for phase compensated applications

Andreas S. Rasch, Matthias Rottschalk, Wolfgang Karthe

Author Affiliations +

Proceedings Volume 2212, Linear and Nonlinear Integrated Optics; (1994) https://doi.org/10.1117/12.185105
Event: Integrated Optoelectronics '94, 1994, Lindau, Germany

Abstract

Thermooptic coefficients of the effective refractive index in integrated optical strip waveguides in LiNbO₃ have been measured with high accuracy by Mach-Zehnder and Fabry-Perot interferometer techniques. Titanium indiffused and annealed proton exchanged (APE) strip waveguides were found to have the same value as it is known for the substrate material. Multimode proton exchanged (PE) strip waveguides specially designed for maximum field overlap to the APE guides show a reduction of the thermooptic coefficient to one-fifth with negative sign. Phase shift dependent on temperature was examined in APE strip waveguides containing such a strip-shaped multimode PE segment.

Citation Download Citation

Andreas S. Rasch, Matthias Rottschalk, and Wolfgang Karthe "Determination of thermooptic coefficients in PE: and APE:LiNbO3 strip waveguides for phase compensated applications", Proc. SPIE 2212, Linear and Nonlinear Integrated Optics, (25 August 1994); https://doi.org/10.1117/12.185105

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