Patent ID: 7689131
Filing Date: 2010-03-30
Classification: H04B,H04J

Abstract:
1. An optical transmission apparatus, comprising: a wavelength demultiplexing unit for wavelength-demultiplexing a first wavelength multiplexed light which is transmitted through a first optical transmission path, into a plurality of light signals; a wavelength multiplexing unit for transmitting to a second optical transmission path a second wavelength-multiplexed light which is produced by multiplexing each of the plurality of light signals which are obtained by demultiplexing; and a supervisory control unit for causing supervisory control signal information transmitted to the second optical transmission path with the second wavelength-multiplexed light to carry information of the supervisory control signal transmitted through the first optical transmission path with the first wavelength-multiplexed light, wherein the supervisory control unit calculates an amount of transmitting ASE light from the wavelength-demultiplexing unit to the wavelength-multiplexing unit based on a characteristic of a filter of the wavelength-demultiplexing unit from an optical SN ratio of each wavelength in output of a reception amplifier at a preceding stage of the wavelength demultiplexing unit, a bandwidth of a filter in a wavelength-multiplexing unit and a wavelength demultiplexing unit, and output power of a transmission amplifier of the wavelength-multiplexing unit, and reflects the amount of transmitting ASE light to the supervisory control information transmitted to the second optical path.