Research Round-up: September - November 2022

Take a look at the research the TRANSNET team have published during the first last three months, featuring papers on fiber amplifiers, geometrical constellation shaping, and many more. 

Journal Paper

Overview of high-speed TDM-PON beyond 50 Gbps per wavelength using digital signal processing [Invited Tutorial](https://doi.org/10.1364/JOCN.468920)
Journal of Optical Communications and Networking

This, co-authored by Dr Md Saifuddin Faruk and Prof Seb Savory, reviews the recent research and standardization steps towards the development of the higher-speed passive optical network (PON) physical layer, that achieve bit rates well above 10 Gbps/λ. It offers a concluding argument that advancement toward 50. 100, and 200 Gbps/λ will require a strong introduction of advanced digital signal processing (DSP) technologies.  This work is a collaboration across the University of Cambridge, Futurewei Technologies, Inc., and Politecnico di Torino.

Journal Paper

High-Cardinality Geometrical Constellation Shaping for the Nonlinear Fibre Channel (https://doi.org/10.1109/JLT.2022.3197366)
Journal of Lightwave Technology

The paper, led by Dr Eric Sillekens, presents a novel and fast computation method for optimising geometrically shaped signal constellations with very high cardinality to increase the throughput and reach of optical fibre communication systems. It is a collaboration between University College London, Infinera Canada Inc., and Eindhoven University of Technology.

Journal Paper
Design and transmission analysis of trench-assisted multi-core fibre in standard cladding diameter (https://doi.org/10.1364/OE.472430)
Optics Express

This paper reports on the design of 6-core and 8-core fibres with standard cladding diameter, using artificial intelligence-based techniques. Led by Professor Georgios Zervas, the research provides an overview on the transmission characteristics and performance of multi-core fibres, in terms of capacity and spatial spectral efficiency for a range of transmission distances.

Journal Paper
30-GBaud DP 16-QAM transmission in the E-band enabled by bismuth-doped fiber amplifiers (https://doi.org/10.1364/OL.468796)
Optics Letters

This paper demonstrates the transmission of five 30-GBaud DP 16-QAM signals (coarsely spaced) over 160-km in the E-band (1410–1460 nm). It shows that bismuth-doped fiber amplifiers are a promising solution for expanding current optical telecommunication bandwidth beyond C+L bands toward the E-band.

Journal Paper 
Ultrawideband Systems and Networks: Beyond C + L-Band (https://doi.org/10.1109/JPROC.2022.3202103)
Proceedings of the IEEE

This paper provides a welcome discussion on the merits and challenged of an ultrawideband optical transport systems, given that there is a growing need to extend opticaal bandwidth beyond C + L-band. The work is a collaboration between Fujitsu Ltd., Politecnico di Torino, University College London, Nokia Bell Labs, Aston University, and Fraunhofer Institute for Telecommunications.

 For a full list of published TRANSNET research, including journal and conference papers, please take a look at our publications page.