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We demonstrate field-programmable gate array (FPGA)-based multiband orthogonal frequency-division multiplexing (OFDM) signal reception after 600-km standard single-mode fiber (SSMF) transmission and 400-ps differential-group delay (DGD) at 110-Gb/s. The coherent OFDM (CO-OFDM) signal is generated with a recirculating frequency shifter producing 11 uncorrelated OFDM orthogonal bands.
1-Tb/s per channel coherent optical OFDM transmission over 600-km SSMF fiber is demonstrated assisted with a recirculating frequency shifter. Record spectral efficiency and transmission reach is achieved at 1-Tb/s channel rate without Raman amplification.
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