Antenna-coupled millimeter-wave LiNbO/sub 3/ electro-optic modulator

Abstract

The phase-velocity mismatch due to material dispersion in traveling-wave LiNbO_3 optical \nwaveguide modulators may be greatly reduced by breaking the modulation transmission line into short \nsegments and connecting each segment to its own surface antenna. The array of antennas is then \nilluminated by the modulation signal at an angle which produces a delay from antenna to antenna to \nmatch the optical waveguide's delay.