Patent ID: 6785308
Filing Date: 2004-08-31
Classification: H04B

Abstract:
An optical spectral conditioning system, comprising:a laser emitting an optical signal, the laser having a back facet emitting a first portion of the optical signal and a front face emitting a second portion of the optical signal; a first monitor optically coupled to the back facet of the laser, the first monitor generating a first electrical signal corresponding to the first portion of the optical signal; an optical bandpass filter receiving the second portion of the optical signal from the front face of the laser and providing an optically filtered bandpass output, the optical bandpass filter having filtering characteristics defined by a filter profile, the filter profile including a high wavelength skirt at an upper wavelength region of the filter profile; a second monitor optically coupled to the output of optical bandpass filter, the second monitor generating a second electrical signal corresponding to the light emitted by the output of the bandpass filter; and a comparator receiving the first electrical signal and the second electrical signal, the comparator generating a dithering signal based on the first electrical signal and the second electrical signal, the dithering signal causing the laser to emit the first optical signal at the wavelength proximate to the optical filter high wavelength skirt.