Abstract

High-speed electrooptic travelling-wave integrated-optic modulators (TWIOM) are considered to be the key components of the sensor and communication system /I/. The main factor limiting the speed of LiNbO₃ TWIOM is a mismatch between the microwave and optical velocities. The earlier proposed /2,3/ aperiodic Barker code phase-reversal electrode patterns can increase bandwidth-to-voltage ratio BVR but no more than 4 times as compared to a conventional device, and with the frequency response with the dips up to 5 dB. The paper presents the method for determining the dependance of the local electrooptical overlap integral and for designing the electrode pattern to obtain a flat frequency response FR with significant BVR increase.

© 1988 Optical Society of America