Patent ID: 6426817
Filing Date: 2002-07-30
Classification: H04B,H04J

Abstract:
An optical wavelength multiplexing system, comprising:an optical signal transmission unit, corresponding to at least one wave length, the optical signal transmission unit transmitting an optical signal including information to be transmitted; a wavelength number setting unit storing a number of wavelengths in service; and a control light transmission unit multiplexing with the optical signal a light having a wavelength different from that of the optical signal including the information to be transmitted, transmitting the multiplexed light and signal, and a total optical level of the actually transmitted optical signal and multiplexed light is adjusted to be equal to a total optical level of the optical signal transmitted when an optical signal is transmitted having a maximum number of multiplexed wavelengths of said optical wavelength multiplexing system, and is adjusted according to the number or wavelengths in service, which is stored in the wavelength number setting unit to indicate an appropriate optical level of the optical light having the different wavelength from that of the optical signal including the information.