| 摘要 |
PROBLEM TO BE SOLVED: To receive a correct optical signal without reception of an incorrect optical signal in an inverse multiplex transmission technology by which one input signal is divided into a plurality of optical signals to perform a wavelength multiplex transmission.SOLUTION: A de-multiplexing optical transmission device 30 includes: an O/E conversion part 31 that converts one optical signal 101 into one electric signal 102; a signal inverse separation part 32 that inversely separates the electric signal 102 into a plurality of electric signals 111 and 112; and an E/O conversion part 33 that converts the electric signals 111 and 112 into a plurality of optical signals 121 and 122 respectively having different wavelengths λ1 and λ2, and superimposes a tone signal 103(frequency f1) on the optical signals 121 and 122 and outputs the superimposed signals to a wavelength division multiplex part 10. |
