Patent ID: 6369923
Filing Date: 2002-04-09
Classification: H04B,H04J,H04Q

Abstract:
An optical transmission system for generating light signals at a plurality of predetermined wavelengths on an output fiber, said system comprisinga plurality of modulated laser sources coupled to said output fiber, each laser source having an output for one of said predetermined wavelengths; a feedback loop connected to said output fiber and said plurality of laser sources, said feedback loop having a first subloop generating electrical signals indicative of an amount of light carried on said output fiber; a second subloop generating electrical signals indicative of a total amount of light carried on said output fiber at said predetermined wavelengths; and a control unit coupled to said plurality of laser sources for controlling an output wavelength of each of said laser sources, said unit receiving said electrical signals from said first and second subloops and controlling said laser source output wavelengths so that the output of each of the laser sources is centered at one of the predetermined wavelengths.