Patent ID: 8503881
Filing Date: 2013-08-06
Classification: H04B,H04J

Abstract:
1. A wavelength division multiplexing system operating at O-Band and C-Band comprising: an O-Band transmitter for generating a digital O-Band optical signal; a C-Band transmitter for generating a digital C-Band optical signal; an O-Band and a C-Band optical amplifier module connected with the O-Band and C-Band transmitters respectively, for amplifying the O-Band and C-Band optical signals; a first wavelength division multiplexer for wavelength multiplexing the O-Band optical signal with the C-Band optical signal; a fiber transmission span using constant intensity modulation and semiconductor optical amplification, the transmission span comprising: a wavelength division demultiplexer coupled to an end of the single mode fiber for restoring the length of single mode fiber for restoring the original O-Band optical signal and C-band optical signal; a length of O-Band optical dispersion compensation serially coupled with an O-Band optical amplifier for dispersion compensation and amplification coupled with the output of the wavelength division demultiplexer; a length of C-Band optical dispersion compensation serially coupled with a C-Band optical amplifier for dispersion compensation and amplification coupled with the output of the wavelength division demultiplexer; and a second wavelength division multiplexer for multiplexing the amplified O-Band and C-Band optical signals for transmission over a second length of single mode fiber; an amplification and dispersion compensation module coupled into the fiber transmission span to separately amplify each of the O-Band optical signals and C-Band optical signals and compensate for the dispersion caused by the fiber transmission span and to reduce four-wave mixing; a first wavelength division demultiplexer for receiving the transmitted multiplexed optical signal and restoring and O-Band and C-Band optical signals; an O-Band and a C-Band receivers for receiving restored digital O-Band and C-Band optical signals, respectively.