A stream of wavelength division multiplexed optical signals can be converted into the electrical domain and processed electrically to discriminate the information on each optical signal. An optical medium can transmit multiple optical communication signals, each having a different wavelength and each imprinted with different information. Detectors can receive the optical communication signals, with each detector receiving some of each communication signal. Thus, any one of the detectors can output an electrical signal according to a composite of multiple optical communication signals. Accordingly, each output electrical signal can include features or energy of each of the optical communication signals. An electrical circuit can process the electrical signals output by the detectors. The processing can remove from each electrical signal contributions from all but one of the optical communication signals, so that each processed electrical signal carries the information of a single wavelength division multiplexed optical signal.