Patent ID: 7376356
Filing Date: 2008-05-20
Classification: H04J

Abstract:
1. An optical data network that uses subcarrier modulation comprising: a light source configured to generate light at both a center channel wavelength and a set of subcarriers about the center channel wavelength; a subcarrier modulator optically coupled to the light source, the subcarrier modulator having multiple modulators cascaded in a single planar waveguide to modulate data streams onto more than one of the subcarriers to produce a subcarrier modulated light signal; an optical transmission path optically coupled to the subcarrier modulator, the optical transmission path configured to transmit the subcarrier modulated light signal; and a subcarrier demodulator optically coupled to the optical transmission path, the subcarrier demodulator configured to demodulate the subcarrier modulated light signal.