| 摘要 |
A wavelength division multiplexed optical communication system protects against light path failure on a per wavelength basis. At the source optical node an output device outputs first and second multiple wavelength signals on respective first and second light paths. At the sink optical node a first demultiplexer demultiplexes the first multiple wavelength signal into separate wavelengths, and a second demultiplexer demultiplexes the second multiple wavelength signal into separate wavelengths. For each wavelength signal the sink optical node includes transponders and coupler. The coupler has inputs connected to the respective outputs of the first and second transponders, and an output for outputting an optical signal received at one of the first and second inputs. A controller determines if the first transponder is outputting the first optical signal. Inhibiting from outputting the second optical signal. If not, the second transponder is not inhibited and the coupler outputs the second optical signal. |
