Optical communications – Multiplex – Hybrid
Reexamination Certificate
2007-01-16
2007-01-16
Phan, Hanh (Department: 2613)
Optical communications
Multiplex
Hybrid
C398S074000, C398S079000, C398S083000, C398S085000, C398S059000, C398S098000, C398S100000, C398S141000, C398S200000, C398S183000, C398S185000, C398S047000
Reexamination Certificate
active
10436942
ABSTRACT:
An optical signal transmitter is disclosed that transmits an optical signal with corresponding Wavelength Division Multiplexing (WDM) channels and Time Division Multiplexing (TDM) channels. The transmitter is comprised of a laser, a dispersion system, and a modulator. The laser generates and transmits a narrow laser pulse comprised of a plurality of wavelength channels. The dispersion system broadens the narrow laser pulse into a wide laser pulse. The modulator modulates the wide laser pulse based on an electric modulation signal comprised of a plurality of time slot channels wherein the time slot channels in the electric modulation signal correspond to the wavelength channels in the wide laser pulse respectively. The modulator transfers a modulated wide laser pulse. Channels of the modulated wide laser pulse are hybrid wavelength and time slot channels. The transmitter singularly transmits a WDM optical signal comprised of multiple wavelength channels. The transmitter also allows a filter to drop time slot channels from a TDM optical signal instead of an expensive demultiplexer.
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Chen Li-Ping
Shi Chao-Xiang
Phan Hanh
Sprint Communications Company L.P.
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