Patent ID: 8983306
Filing Date: 2015-03-17
Classification: H04B,H04J

Abstract:
1. An apparatus, comprising: a plurality of lasers, each laser configured to lase at a corresponding lasing wavelength; an optical multiplexer that is periodic in its frequency response and configured to receive light from the plurality of lasers, with each laser of the plurality being connected to a different optical input port of the optical multiplexer, wherein the optical multiplexer is configured to multiplex the light received from the lasers to produce an optical output signal; a spectral analyzer optically coupled to measure a spectral composition of the optical output signal over one or more wavelength ranges; a first temperature-control unit thermally coupled to the optical multiplexer; and a controller operatively connected to control the spectral analyzer to measure the spectral composition over said one or more wavelength ranges, wherein each of said one or more wavelength ranges excludes the lasing wavelengths; and wherein the controller is configured to adjust a spectral location of optical pass bands of the optical multiplexer based on the spectral composition measured by the spectral analyzer, said adjustment being performed by causing the first temperature-control unit to change a temperature of the optical multiplexer.