Linear Longitudinal Electro-Optic Effect In Oxygen Octahedra Ferroelectrics

M. Ingold; P. Gunter

doi:10.1117/12.949991

31 January 1989 Linear Longitudinal Electro-Optic Effect In Oxygen Octahedra Ferroelectrics

M. Ingold, P. Gunter

Proceedings Volume 1018, Electro-Optic and Magneto-Optic Materials; (1989) https://doi.org/10.1117/12.949991
Event: 1988 International Congress on Optical Science and Engineering, 1988, Hamburg, Germany

Abstract

Electro-optic half-wave voltages have been calculated for a longitudinal geometry in crystals of point group symmetry mm2 (orthorhombic) and 4mm (tetragonal). The predicted minimal longitudinal half-wave voltages range from 194 V in KNbO3, 100 V in Sr0,75Ba0,25Nb2O6 and 40 V in BaTiO3 to 9 V in KTa1-xNbxO3. The angular, wavelength and temperature dependences of the half-wave voltage have been determined. In KNbO3 measurements of the minimal longitudinal half-wave voltage at room temperature reached (195±8) V and (118±7 V) with red (λ=633 nm) and blue light (λ=458 nm) respectively. At -40°C, close to the orthorhombic-rombohedral phase transition, the half-wave voltage for red light reduces to (135±6) V. From the measurements we determine a negative sign of the electro-optic coefficient r42=-380 pm/V. The possibility of spatial light modulation by the longitudinal electro-optic effect is discussed.

Citation Download Citation

M. Ingold and P. Gunter "Linear Longitudinal Electro-Optic Effect In Oxygen Octahedra Ferroelectrics", Proc. SPIE 1018, Electro-Optic and Magneto-Optic Materials, (31 January 1989); https://doi.org/10.1117/12.949991

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