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We describe a smart-pixel circuit that permits the use of a GaAs͞AlGaAs multiple quantum well diode to be used both as a detector for data input and a modulator for data output. The module provides the ability to double the number of inputs or outputs to the array and is well suited to cascaded optoelectronic system architectures that require bidirectional communition.doi:10.1364/ao.36.004866 pmid:18259290 fatcat:7ltwourgfbglhbwifmtzd5di34