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Modulation formats for multi-core fiber transmission

B.J. Puttnam ; Tobias Eriksson (Institutionen för mikroteknologi och nanovetenskap, Fotonik) ; J.M. Delgado Mendinueta ; R.S. Luís ; Y. Awaji ; N. Wada ; Magnus Karlsson (Institutionen för mikroteknologi och nanovetenskap, Fotonik) ; Erik Agrell (Institutionen för signaler och system, Kommunikationssystem)
Optics Express Vol. 22 (2014), 26, p. 32457-32469.
[Artikel, refereegranskad vetenskaplig]

©2014 Optical Society of America We investigate high dimensional modulation formats for multi-core fibers (MCFs) and spatial superchannels. We show that the low skew variations between MCF cores maybe exploited to generate 'multi-core' formats that offer significant advantages over independently transmitting conventional 4-dimensional formats in each core. We describe how pulse position modulation formats may be transposed to the spatial domain and then investigate a family of modulation formats referred to as core-coding, one of which has the same power and spectral efficiency as polarization switched quaternary phase shift keying but with half of the optical power, potentially improving non-linear tolerance for long distance transmission, albeit at the cost of implementation challenges. Finally, we investigate the application of set-partitioning to multi-core formats using a single-parity check bit transmitted in one quadrature of one polarization in one of the cores and polarization-division multiplexing quadrature phase shift keying data in all remaining cores. We observe that for high core counts, an advantage of almost 3 dB in asymptotic power efficiency may be obtained with negligible impact on spectral efficiency, which translates into experimentally measured reduction in the required optical signal-to-noise ratio of up to 1.8 dB at a bit-error-rate of 10-5 and the same data-rate, and additional transmission reach of up to 20%.



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Denna post skapades 2015-01-19. Senast ändrad 2016-04-28.
CPL Pubid: 210993

 

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