Patent ID: 6735395
Filing Date: 2004-05-11
Classification: H04B,H04J

Abstract:
A WDM communication system for propagating a plurality of optical signals produced by a corresponding plurality of WDM optical sources via an optical fiber comprising:a transmission system for generating and transmitting said optical signals, each said optical signal modulated by a distinguishing electrical signal of low frequency and small modulation depth, and mixing each said modulated optical signal into a WDM optical signal, each said low frequency signal being a distinguishing identifier for each said WDM optical source; a detection system coupled to said transmission system for detecting a portion of said WDM optical signal and obtaining first and second electrical signals carrying information on light intensity and wavelength respectively for each WDM optical source of said plurality of WDM optical sources; and a control system coupled between said transmission system and said detection system for analyzing said first and second electrical signals by Fourier transform and obtaining information on wavelength and light intensity for each said WDM optical source utilizing said distinguished identifier, and adjusting said wavelength and light intensity.