Measurement of the linear electro-optic coefficients of sol-gel derived strontium barium niobate thin films using a two-beam polarization interferometer

A two-beam polarization interferometer in a reflection configuration is use d to measure the electro-optic coefficients of highly oriented strontium ba rium niobate thin films prepared by a sol-gel method. The technique enables the determination of the electro-optic coefficients of films using a stron g Fabry-Perot effect with automatic adjustment and maintenance of the opera tion point of the interferometer. The linear electro-optic coefficients inc rease with increasing Sr content in the films. (C) 2000 American Institute of Physics. [S0003-6951(00)01018-4].