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PhD - Photonic Systems

Reference:JZ-5 Location: Cork City
Qualification:DegreeExperience:0-1 Years
Job Type:Full-TimeSalary: See description
May be suitable for: PhD Studentship

Applicants are invited for a PhD positionstarting before09/2017 in the Photonics Systems Group at Tyndall National Institute at University College, Cork. The PhD studentship and fee are funded for up to 4 years.

This project is to address the capacity and transmission reach limit imposed by fiber Kerr nonlinearity in long-distance optical transmission systems. Coherent technology has enabled advanced modulation formats with high spectral efficiency and allowed efficient compensation of linear impairments such as dispersion. Nevertheless, optical systems are still confronted with the bottleneck imposed by fiberKerr nonlinearity. Instead of increasing the optical signal to noise ratio (OSNR) arbitrarily, there is an optimal signal power, beyond which nonlinear induced penalty overwhelms the benefit of increases OSNR. This in turn limits the maximal amount of transmitted information and/orthe transmission reach. In the literature,various methods have been proposed to mitigate the fiber nonlinear effect, such as digital back propagation, phase conjugation, nonlinear Fourier transform, and phase conjugate twin wave.Existingmethods havetheir advantages and disadvantages. This project willimprove existing and proposenew solutions to effectively mitigatenonlinear effects while considering the issues of complexity, spectral efficiency, flexibility etc. simultaneously.


The successful candidate will complete UCC academic modules, including technical and entrepreneurship courses. Training in terms of experimental and numerical skills will be provided in the first/second year but the candidate is expected to be more independent in senior years, e.g. be able to implement an algorithm or experimental setup independently. He/she will have the sense of responsibility to move the project forward, and the ability to write reports/articles and make presentations as the project goes.

The candidate will understand the physics of fiber nonlinearity and its implication in optical transmission systems, and study schemes to mitigate the fiber nonlinearity to enhance the capacity/transmission reach more efficiently at lower cost. The study may involve the knowledge and skills of fiber physics, optical/digital signal processing, modulation formats, and the nonlinear Shannon limit.


· The candidate will ideally have a master or first class undergraduate degree in electronic engineering, telecommunications, physics or related relevant discipline.

· Non-EU candidates should also meet the English requirement of University College Cork.

· Knowledge on optical fibers including characteristics, impairments (dispersion/nonlinear effects), and the implication of the impairments on optical communications systems

· Programming skills in Matlab/VPI

· Good presentation and writing skills

· Theory/numerical/experimental experience on optical/digital signal processing, transmission technologies (advanced modulation formats, coherent detection), or information theory would be considered as an advantage.

Please apply via, selecting reference number JZ-5 and following the instructions to complete the associated application form, attaching your cv and motivation letter.

At this time, Tyndall National Institute does not require the assistance of recruitment agencies.

Tyndall National Institute is an Equal Opportunities Employer.