OPTICAL DEMULTIPLEXER

摘要

PROBLEM TO BE SOLVED: To provide an optical demultiplexer which overcomes or reduces various defects of optical demultiplexers in current technology states. SOLUTION: The optical demultiplexer is equipped with a dispersive means (e.g. optical element 30) which separates a light wavelength-division multiplexed signal 11 into its component optical signals and a photodetector array 54 which converts the component optical signals into electrical signals.