OPTICAL WAVE-GUIDE FABRY-PEROT MODULATORS IN LINBO3

Fabry-Perot-type electro-optic modulators have been produced with Ti:L iNO3 optical waveguides. The end mirrors are formed by depositing six pairs of SiO2 and TiO2 layers at the waveguide input and output faces. AV(pi) of approximately 4V was measured at 0.81 mum wavelength for th e extraordinary polarization in a 7-mm interaction length. Comparison of the modulation performance in the linear region with the modulation performance of a polarization intensity modulator of similar geometry indicates a sensitivity for the Fabry-Perot modulator that is approxi mately 3 times larger. The sensitivity can be further improved by usin g higher reflectance mirrors and reducing waveguide losses.