Patent ID: 9300402
Filing Date: 2016-03-29
CPC Classification: H04B

Claim Text:
1. An optical communication system comprising: a transmitter configured to transmit a plurality of optical signals at different associated wavelengths within a signal band of wavelengths; a receiver configured to receive said plurality of optical signals, said receiver comprising at least one coherent detection receiver and at least one direct detection receiver; and a transmission path extending between said transmitter and said receiver for coupling at least a first one of said optical signals from said transmitter to said at least one coherent detection receiver and at least a second one of said optical signals from said transmitter to said direct detection receiver, said transmission path configured to cause accumulation of dispersion to a maximum accumulated dispersion of at least 10,000 ps/nm in at least one portion of said transmission path for each of said wavelengths in said signal band, and to compensate for said maximum dispersion for each of said wavelengths in said signal band to return said maximum accumulated dispersion for at least one of said wavelengths in said signal band to near zero at said receiver, whereby said at least a first one of said optical signals coupled from said transmitter to said at least one coherent detection receiver has said maximum accumulated dispersion of at least 10,000 ps/nm and said at least a second one of said optical signals coupled from said transmitter to said direct detection receiver has said maximum accumulated dispersion of at least 10,000 ps/nm.