Patent ID: 8909057

Claim:
A system for transporting a plurality of digital signals as a single optical signal on a single optical fiber to reduce second order distortions during optical transport, the system comprising: a plurality of modems for separately modulating a respective digital signal and outputting a respective RF signal; a plurality of up-convertors, each up-convertor electrically connected to a respective modem to receive an RF signal therefrom, and operating on the RF signal to create an output RF signal having a frequency band, wherein the frequency bands of the plurality of the output RF signals are non-overlapping with each other and spaced apart from each other within a single sub-octave frequency spectrum; an RF combiner for producing a combined RF signal from the frequency bands; an optical transmitter for converting the combined RF signal into the optical signal to be directed into the optical fiber; an optical receiver for converting the optical signal to a transmitted RF signal; an RF splitter for producing signal fractions from the transmitted RF signal; and a plurality of down-convertors, each down-convertor receiving a signal fraction from the splitter and outputting an RF signal having one of the digital signals encoded thereon.