We demonstrate ten-channel WDM transmission of 112-Gb/s 16-QAM (14-gigabaud, polarization-multiplexed) over 630 km of fiber. 16.7-GHz channel spacing yields a spectral efficiency of 6.2 b/s/Hz, fitting 1 Tb/s of information into a 1.2-nm optical bandwidth.
© 2009 Optical Society of AmericaPDF Article
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