Matrix - matrix and matrix - vector multiplications can be performed optically using techniques
involving a number of spatial light modulator technologies. Acousto-optic modulators offer the
advantages of high efficiency and fast reconfiguration times, on the order of several
nanoseconds. Recent efforts to reduce the package size of the acousto-optic SLM devices and
increase their pertormance characteristics have rendered this approach more attractive to
system designers.
This paper reports the results of such efforts applied to a 64 channel acousto-optic modulator
and a 64 channel acousto-optic deflector that can be used in tandem to optically compute
matrix-matrix and matrix-vector calculations. The modulator is placed in the optical path prior to
the deflector and is used as the column selector. The deflector can be operated by pulsing the
RF signals to produces packets of information along the optical aperture and reimaging the
deflector at the detector plane. This method known as Scophony imaging performs the function
of row selector and allows true two-dimensional SLM operation from the acousto-optic devices.
Specification trade-offs and fabrication issues are covered. Measured performance parameters
are summarized.
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