Acousto-optic Bragg diffraction in a LiNbO3 channel-planar composite waveguide with application to optical computing

Publisher Website
Google Scholar
Abstract
Successful experimentation on acousto‐optic Bragg diffraction in a LiNbO3 composite waveguide that consists of an array of parallel but uncoupled channel waveguides directly extended to a single‐mode planar waveguide and a titanium‐indiffused proton‐exchanged (TIPE) microlens array is reported for the first time. A channel‐waveguide array, a planar waveguide, a linear TIPE microlens array, a 500‐MHz surface acoustic wave transducer, and an integrating lens have all been integrated in a substrate size of 0.2×1.0×2.0 cm to form an integrated acousto‐optic Bragg modulator that should find a variety of applications in optical computing, signal processing, and communications. The resulting modulator module has been utilized to perform matrix‐vector multiplication.