An optical integrated circuit of a 40-channel electrooptical LiNbO3 modulator for data-processing devices

An optical integrated circuit for a 40-channel electrooptical phase modulator has been developed. The channel waveguides are prepared through Ti thermal diffusion into a Y-cut LiNbO3 substrate. The half-wave voltage for each channel is 1.6 V at a modulating frequency bandwidth of 0-290 MHz. Results are presented from an experiment concerning the use of the modulator as an input device for the optical processing of radio signals.