Series path of the optical signal

An optical signal distribution network comprising a semiconductor substrate including itself formed within a waveguide to carry the optical signals, and a plurality of detectors disposed along the longitudinal direction in series in the waveguide, each detector, be capable of detecting an optical signal through them, sufficiently transparent for the optical signal enough to be made to reach an optical signal to all of the plurality of detectors, and a plurality It can be detected by all of the detectors.