An optical-to-electrical converter includes an input port configured to receive an optical signal. The converter further includes a splitter configured to split the received I optical signal into a plurality of optical signals. An optical stage has a plurality of parallel stages, and each parallel stage receives a corresponding one of the plurality of identical signals and outputs a corresponding one of a plurality of sampled optical signals within a corresponding sampling window. A plurality of delay circuits receive a clock signal having a plurality of clock pulses separated by a clock period. The delay circuits respectively output a plurality of control pulses at a plurality of delayed timings with respect to each clock pulse of the clock signal. An electrical stage receives the plurality of sampled optical signals and processes the optical signals at a sampling rate corresponding to the clock period of the clock signal.