| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an OADM (optical add/drop multiplexer) device and an OADM system for installing more links in a section of transmission section at low cost. <P>SOLUTION: The OADM device includes a first optical add/drop section that includes a first optical coupler for dropping an optical signal inputted from a first route, an optical demultiplexer for outputting an optical signal from the dropped first optical signal, an optical multiplexer for outputting an optical signal to be added in the first route, and a second optical coupler for adding an optical signal outputted by the optical multiplexer in a passing optical signal; an optical multiplexer for outputting an optical signal to be added in a second route; a first wavelength selection switch for inputting the optical signal outputted by the optical multiplexer and a second optical signal dropped by the first optical coupler of the first add/drop section, selecting an optical signal and a passing optical signal to be added in the second route every wavelength, and outputting them to the second route; a second wavelength selection switch for selecting the optical signal dropped from light inputted from the second route and the passing optical signal in the first route for each wavelength; an optical demultiplexer for outputting an optical signal of the wavelength to drop; and a second optical add/drop section for outputting the passing optical signal to the second coupler of the first optical add/drop section. <P>COPYRIGHT: (C)2011,JPO&INPIT |
