Wavelength division multiplexing transmission device

摘要

A transmitter to be added or reduced turns ON/OFF an optical output. A relay station and a receiving terminal station acquire the amount of fluctuation of the optical output of the received signal light when the optical output of the added transmitter is turned ON and OFF. From the amount of fluctuation of the optical output, the number of wavelengths after the addition or reduction is acquired. Without an OSC signal, each station may be informed of the number of wavelengths. Therefore, the configuration for transmitting and receiving the OSC signal is not requested, thereby reducing the total cost, appropriately controlling the gain of the optical amplifier, and successfully maintaining transmission quality.

主权项

1. A wavelength division multiplexing transmission device in a wavelength division multiplexing transmission system which transmits signal light from a transmitting terminal station, the device comprising:
an optical intensity detection unit configured to detect light intensity of signal light transmitted from the transmitting terminal station when an output of a transmitter added or reduced in the transmitting terminal station is turned ON and OFF; and a wavelength number detection unit configured to detect a number of wavelengths corresponding to a number of transmitters after being added or reduced, the wavelength number detection unit detecting the number of wavelengths based on an amount of fluctuation of the light intensity between a first light intensity of the signal light detected by the optical intensity detection unit when the output of the transmitter is turned ON and a second light intensity of the signal light detected by the optical intensity detection unit when the output of the transmitter is turned OFF.