FIELD: optical signal processing; transfer of multichannel and single-channel messages over optical communication lines.
SUBSTANCE: newly introduced in acoustic-optical receiver that has reference signal generator, as well as light source, collimator, ultrasonic light modulator, first integrating lens, spatial filter, second integrating lens, and first array of n photodetector, all arranged in tandem on one optical axis, are reference-voltage generator, second array of n photodetectors, n first-group subtracters, n second-group subtracters, n first-group threshold units, n second-group threshold units, first and second adders, first and second weighting adders, difference circuit, comparator, as well as first, second, third, and fourth delay lines.
EFFECT: double extension of received-signal time space being monitored.
1 cl, 3 dwg
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