As the optical industry approaches the fundamental physical limits of optical transmission, researchers are exploring new ways to increase capacity by using multi-core fibre (MCF). Now NEC Corporation of America and Corning Inc. say they have set a new transmission record by sending data at 1.05 Pbps (1015 bits per second) over a novel optical fibre containing 14 cores.
The research was originally reported at the 2012 Frontiers in Optics/Laser Science XXVIII (FiO/LS) meeting in Rochester, NY, in October 2012.
Designed by Corning researchers, the novel optical fibre has 12 singlemode cores and 2 few mode cores, which enables transmission over a large number of spatial modes. By combining multilevel modulation formats with wavelength, polarization and spatial mode multiplexing, NEC researchers achieved a total spectral efficiency of 109 bits/sec/Hz. The aggregate transmission capacity of 1.050 Pbps is the highest capacity over a single optical fiber reported so far, the researchers claim.
Dr. Ting Wang, head of optical networking research at NEC Laboratories America, said the company has “opened new frontiers with the highest transmission capacity over any type of optical fibres”. The company is hoping to develop technologies that will form the foundation of the next generation of optical networking.
The NEC/Corning announcement follows news from Japanese electronics giant NTT and partners, who reported “ultra-large capacity transmission” in September 2012 of 1 Pbps over 52.4 km of 12-core optical fibre. The NTT experiment was presented as a post-deadline paper at ECOC 2012 in Amsterdam, the Netherlands.
By Pauline Rigby
Press release: NEC and Corning Achieve Record-breaking Results in Optical Transmission Capacity
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