Maximising throughput in multiwavelength optical networks operating in nonlinear regime
Lead Research Organisation:
University College London
Department Name: Electronic and Electrical Engineering
Abstract
High-capacity, low-delay ubiquitous broadband communication infrastructure is critical to the development and grown of the digital economy. Optical fibres
form the backbone of this infrastructure and must ensure sufficient capacity for the development of new, high-capacity life transforming services. However, optical fibre channels are nonlinear. The capacity of nonlinear channels
is unknown and the research is focused on the development of appropriate channel models to enable the calculation of achievable information rates for different modulation formats and symbol rates and any increases
which can be achieved through nonlinearity mitigation and coding. Whilst increases in achievable rates with these techniques may be limited for point-to-point links, they could be translated in significant gains in network throughput when applied to network topologies. This requires the combination of information theory for nonlinear channels and graph theory for quantifying network throughputs as a function of both the network topology and nonlinear channel properties. Potentially this research could transform he design of optical network architectures and the design of the data communications infrastructure as a whole. The student's research focuses on the ananlysis of optical fibre systems and network performance when operated over significantly wider bandwidths than used currently. Expansion of the optical fibre bandwidth operating range requires the analysis of stimulated Raman scattering for coherent optical fibre transmission, not analysed to date, the development of rapid analytical tools for systems and networks analysis and the quantification of the network throughputs in the wideband nonlinear regime.
Relevance to EPSRC thematic areas: ICT with strategic priorities in Towards Intelligent Information Infrastructure and Photonics for future systems; Digital Economy in areas Digital Signal Processing, ICT Networks.
form the backbone of this infrastructure and must ensure sufficient capacity for the development of new, high-capacity life transforming services. However, optical fibre channels are nonlinear. The capacity of nonlinear channels
is unknown and the research is focused on the development of appropriate channel models to enable the calculation of achievable information rates for different modulation formats and symbol rates and any increases
which can be achieved through nonlinearity mitigation and coding. Whilst increases in achievable rates with these techniques may be limited for point-to-point links, they could be translated in significant gains in network throughput when applied to network topologies. This requires the combination of information theory for nonlinear channels and graph theory for quantifying network throughputs as a function of both the network topology and nonlinear channel properties. Potentially this research could transform he design of optical network architectures and the design of the data communications infrastructure as a whole. The student's research focuses on the ananlysis of optical fibre systems and network performance when operated over significantly wider bandwidths than used currently. Expansion of the optical fibre bandwidth operating range requires the analysis of stimulated Raman scattering for coherent optical fibre transmission, not analysed to date, the development of rapid analytical tools for systems and networks analysis and the quantification of the network throughputs in the wideband nonlinear regime.
Relevance to EPSRC thematic areas: ICT with strategic priorities in Towards Intelligent Information Infrastructure and Photonics for future systems; Digital Economy in areas Digital Signal Processing, ICT Networks.
Organisations
People |
ORCID iD |
Polina Bayvel (Primary Supervisor) | |
Daniel Semrau (Student) |
Publications
Elson DJ
(2017)
Investigation of bandwidth loading in optical fibre transmission using amplified spontaneous emission noise.
in Optics express
Galdino L
(2017)
On the limits of digital back-propagation in the presence of transceiver noise.
in Optics express
Lavery D
(2017)
On the bandwidth dependent performance of split transmitter-receiver optical fiber nonlinearity compensation.
in Optics express
Saavedra G
(2017)
Digital back-propagation for nonlinearity mitigation in distributed Raman amplified links.
in Optics express
Saavedra G
(2017)
Experimental Analysis of Nonlinear Impairments in Fibre Optic Transmission Systems up to 7.3 THz
in Journal of Lightwave Technology
Semrau D
(2017)
A Closed-Form Expression to Evaluate Nonlinear Interference in Raman-Amplified Links
in Journal of Lightwave Technology
Semrau D
(2017)
Achievable rate degradation of ultra-wideband coherent fiber communication systems due to stimulated Raman scattering.
in Optics express
Semrau D
(2018)
The Gaussian Noise Model in the Presence of Inter-Channel Stimulated Raman Scattering
in Journal of Lightwave Technology
Semrau D
(2019)
A Closed-Form Approximation of the Gaussian Noise Model in the Presence of Inter-Channel Stimulated Raman Scattering
in Journal of Lightwave Technology
Semrau D
(2018)
The Impact of Transceiver Noise on Digital Nonlinearity Compensation
in Journal of Lightwave Technology
Sherborne T
(2018)
On the Impact of Fixed Point Hardware for Optical Fiber Nonlinearity Compensation Algorithms
in Journal of Lightwave Technology
Xu T
(2017)
Modulation format dependence of digital nonlinearity compensation performance in optical fibre communication systems.
in Optics express
Studentship Projects
Project Reference | Relationship | Related To | Start | End | Student Name |
---|---|---|---|---|---|
EP/N509577/1 | 01/10/2016 | 24/03/2022 | |||
1673366 | Studentship | EP/N509577/1 | 01/12/2015 | 30/11/2018 | Daniel Semrau |
Description | I developed novel analytical models that predict the performance of next-generation, ultra-wideband optical transmission systems. The findings are crucial in the design and real-time optimization of transmission systems that operate over bandwidths beyond the conventional C-band (5 THz). |
Exploitation Route | My findings can be used to optimize optical networks on the network layer. My findings abstract the physical layer of an optical transmission system and provide higher communications layers with easy but yet accurate optimization tools. This can lead to a more intelligently managed network architectures aware of the physical properties of the underlying transmission medium. |
Sectors | Digital/Communication/Information Technologies (including Software),Electronics |
Description | Conference Talk |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Geographic Reach | International |
Primary Audience | Professional Practitioners |
Results and Impact | I presented an accepted paper at the European Conference on Optical Communications (ECOC) in Rome, Italy. |
Year(s) Of Engagement Activity | 2018 |
Description | Talk at Nokia Bell Labs US |
Form Of Engagement Activity | A formal working group, expert panel or dialogue |
Part Of Official Scheme? | No |
Geographic Reach | International |
Primary Audience | Professional Practitioners |
Results and Impact | I presented my work at Nokia Bell Labs US talking about my recent research advances and the modeling of nonlinear effects in ultra-wideband transmission systems. |
Year(s) Of Engagement Activity | 2018 |
Description | Talk at TE SubCom |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Geographic Reach | International |
Primary Audience | Professional Practitioners |
Results and Impact | I presented my work at TE SubCom talking about modeling nonlinear effects in ultra-wideband transmission systems. |
Year(s) Of Engagement Activity | 2018 |
Description | Workshop Talk |
Form Of Engagement Activity | A talk or presentation |
Part Of Official Scheme? | No |
Geographic Reach | International |
Primary Audience | Professional Practitioners |
Results and Impact | I gave a presentation at a workshop organized by UCL on next generation optical networks. |
Year(s) Of Engagement Activity | 2018 |