Patent ID: 9106354
Filing Date: 2015-08-11
Classification: H04B,H04J

Abstract:
1. An optical frequency-division multiplexer comprising: a first optical coupler configured to receive at a first input output point a first wavelength-division multiplexed light obtained by wavelength-division multiplexing a first carrier light and a first monitor light and to split the first carrier light and the first monitor light from each other; an optical modulator configured to optically modulate the first carrier light from the first optical coupler using a signal including a first data signal so as to multiplex the first data signal with the first carrier light; an optical power coupler configured to receive the first monitor light from the first optical coupler and to split the first monitor light into a first and a second part of the first monitor light; a receiver configured to receive the first part of the first monitor light and to demodulate a second data signal from the first part of the first monitor light; and a second optical coupler configured to couple the second part of the first monitor light and the first carrier light with which the first data signal has been multiplexed and to transmit the coupled light from a second input output point to an optical network.