| IO signal processors implements high-speed real-time processing based on
its parallel processing capability. An IO RF spectrum analyzer (IOSA) is
a representative IO signal processor consisting of a waveguide acoustooptic
Bragg cell and a Fourier transform component. We have developed several
types of IOSAs on Ti:LiNbO3 waveguides, which include an IOSA using a focusing
grating coupler (FGC) as the Fourier transform component. Other IO signal
processors have been implemented by modifying the IOSA configuration. A
time-integrating-type IO correlator with a specially-designed biaxial FGC
was fabricated and demonstrated. A full-parallel matrix-vector multiplier
was implemented using a modified herringbone electrooptic grating array.
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