Effects of crosstalk in demultiplexers for photonic analog-to-digital converters

Time interleaving of samples digitized by a parallel array of analog-to-dig ital (A/D) converters provides a means of increasing the sampling rate beyo nd that possible with a single A/D converter. For time-interleaved photonic . A/D converters, optical demultiplexers can be used to advantage. Both tim e-division and wavelength-division demultiplexers must yield low crosstalk between the parallel output channels in order to yield accurate A/D convers ion, An analysis predicts the level and form of the resulting errors, The a nalytical results compare well with experiment.