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Optical Transmission

The work in optical transmission within the optical networks group involves understanding the fibre channel transmission
limits and developing techniques to approach these limits.  This includes approaches to unlocking the transmission capacity through the use of advanced digital signal processing techniques in both single- and multi-mode fibres.  The research covers the full range of optical communication requirements, from ultra-long haul and submarine, through metro and access, to inter- and intra-data centre. In particular:

  • Performance of higher order modulation formats in ultra-longhaul transmission
  • Optical Orthogonal Frequency-Division Multiplexing (OFDM)
  • Increasing multimode fibre transmission using Multiple-Input Multiple-Output (MIMO) techniques

Projects

Exploiting the bandwidth potential of multimode optical fibres

This project seeks to develop the technologies and systems required to exploit the spatial dimension of multimode optical fibre using coherent optical reception. It aims to increase the capacity of a single fibre beyond that of existing fibre communication systems in a cost effective and energy efficient manner. Read more ...

Recent Publications

David S. Millar, Domaniç Lavery, Sergejs Makovejs, Carsten Behrens, Benn C. Thomsen, Polina Bayvel, and Seb J. Savory, "Generation and long-haul transmission of polarization-switched QPSK at 42.9 Gb/s," Opt. Express 19, 9296-9302 (2011)

Sergejs Makovejs, Enrico Torrengo, David S. Millar, Robert I. Killey, Seb J. Savory, Bayvel P., “Comparison of pulse shapes in a 224Gbit/s (28Gbaud) PDM-QAM16 longhaul transmission experiment”, Technical Digest of Optical Fiber Communication Conference 2011, OMR5.

Carsten Behrens, Sergejs Makovejs, Robert I. Killey, Seb J. Savory, Polina Bayvel, “Pulse shaping versus digital backpropagation in 224Gbit/s PDM-16QAM transmission”, Optics Express, Vol. 19, No. 14, pp. 12879-12884, 2011

Carsten Behrens, Domanic Lavery, David S. Millar, Sergejs Makovejs, Benn C. Thomsen, Robert I. Killey, Seb J. Savory, Polina Bayvel “Ultra-long-haul transmission of 7x42.9Gbit/s PS-QPSK and PM-BPSK”, accepted for publication in Proceedings of European Conference on Optical Communication 2011.

C. Behrens, R.I. Killey, S.J. Savory, M. Chen and P. Bayvel, “Nonlinear Transmission Performance of Higher Order Modulation Formats”, Photon. Technol. Lett., 23(6), pp. 377-379, (2011).

C. Behrens, R.I. Killey, S.J. Savory, M. Chen and P.Bayvel, “Benefits of digital backpropagation in coherent QPSK and 16QAM fibre links”, Proc. of SPIE 2010, 7988, Article 79880S, (2011).

R.I.Killey and C. Behrens, “Shannon's theory in nonlinear systems”, Journal of Modern Optics, 58(1), pp. 1-10, (2011).

David S. Millar, Sergejs Makovejs, Irshaad Fatadin, Robert I. Killey, Polina Bayvel, Seb J. Savory, “Experimental characterisation of QAM16 at Symbol Rates up to 42Gbaud”, Proceedings of European Conference on Optical Communication 2010, P3.20.

Enrico Torrengo, Sergejs Makovejs, David S. Millar, Irshaad Fatadin, Robert I. Killey, Seb J. Savory, Polina Bayvel, “Influence of Pulse Shape in 112-Gb/s WDM PDMQPSK Transmission”, IEEE Photonics Technology Letters, Vol. 22, No. 23, pp. 1714-1716, 2010.

C. Behrens, R.I. Killey, S.J. Savory, M. Chen and P. Bayvel, “Nonlinear Distortion in Transmission of Higher Order Modulation Formats”, Photon. Technol. Lett., 22(15), pp 1111-1113, (2010).

David S. Millar, Domaniç Lavery, Sergejs Makovejs, Carsten Behrens, Benn C. Thomsen, Polina Bayvel, and Seb J. Savory, "Generation and long-haul transmission of polarization-switched QPSK at 42.9 Gb/s," Opt. Express 19, 9296-9302 (2011)

Sergejs Makovejs, Enrico Torrengo, David S. Millar, Robert I. Killey, Seb J. Savory, Bayvel P., “Comparison of pulse shapes in a 224Gbit/s (28Gbaud) PDM-QAM16 longhaul transmission experiment”, Technical Digest of Optical Fiber Communication Conference 2011, OMR5.

Carsten Behrens, Sergejs Makovejs, Robert I. Killey, Seb J. Savory, Polina Bayvel, “Pulse shaping versus digital backpropagation in 224Gbit/s PDM-16QAM transmission”, Optics Express, Vol. 19, No. 14, pp. 12879-12884, 2011

Carsten Behrens, Domanic Lavery, David S. Millar, Sergejs Makovejs, Benn C. Thomsen, Robert I. Killey, Seb J. Savory, Polina Bayvel “Ultra-long-haul transmission of 7x42.9Gbit/s PS-QPSK and PM-BPSK”, accepted for publication in Proceedings of European Conference on Optical Communication 2011

C. Behrens, R.I. Killey, S.J. Savory, M. Chen and P. Bayvel, “Nonlinear Transmission Performance of Higher Order Modulation Formats”, Photon. Technol. Lett., 23(6), pp. 377-379, (2011)

C. Behrens, R.I. Killey, S.J. Savory, M. Chen and P.Bayvel, “Benefits of digital backpropagation in coherent QPSK and 16QAM fibre links”, Proc. of SPIE 2010, 7988, Article 79880S, (2011)

R.I. Killey and C. Behrens, “Shannon's theory in nonlinear systems”, Journal of Modern Optics, 58(1), pp. 1-10, (2011)

David S. Millar, Sergejs Makovejs, Irshaad Fatadin, Robert I. Killey, Polina Bayvel, Seb J. Savory, “Experimental characterisation of QAM16 at Symbol Rates up to 42Gbaud”, Proceedings of European Conference on Optical Communication 2010, P3.20

Enrico Torrengo, Sergejs Makovejs, David S. Millar, Irshaad Fatadin, Robert I. Killey, Seb J. Savory, Polina Bayvel, “Influence of Pulse Shape in 112-Gb/s WDM PDMQPSK Transmission”, IEEE Photonics Technology Letters, Vol. 22, No. 23, pp. 1714-1716, 2010

C. Behrens, R.I. Killey, S.J. Savory, M. Chen and P. Bayvel, “Nonlinear Distortion in Transmission of Higher Order Modulation Formats”, Photon. Technol. Lett., 22(15), pp 1111-1113, (2010).