A WDM COMMUNICATION SYSTEM UTILIZING WDM OPTICAL SOURCES WITH STABILIZED WAVELENGTHS AND LIGHT INTENSITY AND METHOD FOR STABILIZATION THEREOF

摘要

A multichannel WDM transmission system incorporates a plurality of WDM optical sources with stabilized wavelengths and light intensity. Efficient stabilization of these characteristics is achieved by modulation of WDM sources by distinguishing low frequency electrical signals in a range between 1 and 4 kHz and modulation depth in a range between 1 % and 5 % that are used as WDM source identifiers. After the modulated outputs of the WDM sources are multiplexed and filtered, a Fourier transform of total light intensity may be obtained. Digital feedbacks provide stabilization of both the wavelength and light intensity of each WDM optical source.