Design, Fabrication and Characterization of Horn Antennas in Ti-indiffused LiNbO3 Channel Waveguides*

Abstract

This paper reports the first measurements of the far-field "antenna" patterns of integrated-optics horns both as receivers and transmitters and compares the experimental results with near-field mode patterns and with theory. Horn "antennas" in LiNbO3 are useful for matching field patterns of components being coupled to single-mode LiNbO3 waveguides and for increasing the collection efficiency of the wavefront sensor described below. These measurements also further the basic understanding of the operation of these horns.