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PhD position: Design of Ultra Dense Passive Optical Network to support high number of end user

The PhD position will be hosted in III-V Lab, and include a secondment period of up to 6 months in the Aristotle University of Tessaloniki (Greece).
The PhD student will be part of a research group working on Photonic integrated circuits, and have the opportunity of close collaborations with other Bell Labs laboratories (Germany, Ireland, US) and with Nokia business divisions.

The objective of this PhD is to develop innovative optoelectronic devices compatible with dense wavelength-division multiplexing passive optical networks (DWDM-PON).
  • On the transmitter side, devices are based on directly-modulated lasers or externally modulated lasers at bit rates of 10 or 25Gb/s operating in burst mode. The challenge is to propose innovative devices with accurate wavelength stability and fast tuning over several channels (typically up to 6 nm).
  • On the receiver side, the goal is to develop a wavelength tunable receiver, capable of detecting one single channel, with maximum sensitivity. In close collaboration with III-V Lab teams working on epitaxy and fabrication process, the PhD student will explore solutions based either on monolithically integrated devices on InP material, or on the hybrid integration of InP and Silicon waveguides.

Context 5G STEP-FWD project

The PhD position is in the frame of 5G STEP-FWD (ESR-15), a newly launched Marie Sklodowska-Curie Innovative Training Network (ITN), offering fifteen (15) PhD positions in six European countries. The project will work towards a new high capacity and low latency architecture for backhauling 5G networks. The proposed architecture takes full advantage of the ultra-narrow wavelength spacing of the UDWDM technology, in order to provide connectivity to a dense small-cell population. The project researchers will work both at the physical and the network layer domains, aiming at designing systems and algorithms for building the 5G cellular network of tomorrow. More information on the project can be found here:


The Early Stage Researchers (ESR) enrollments are under very attractive employment conditions and competitive salaries offered in Marie Curie Innovative Training Networks. The selected ESRs will join top-class research groups and have a unique opportunity to pursue a career in mobile and optical communications. Working in this ambitious research project, ESRs could lead to the successful completion of a doctoral degree, together with a very strong joint multidisciplinary research training program in the field of wireless and optical networks. The planned mobility among six EU countries and nine institutions is a plus of these job positions.

Eligibility criteria

Candidates must also meet the following criteria: 1) be in the first four years (full-time equivalent research experience) of their research careers; 2) be of any nationality, but not having resided or carried out their main activity in the country of the host institution of the position they are applying to for more than 1 year in the past 3 years; 3) have not yet been awarded a PhD degree.

Selection process

Applicants must complete and upload the requested information via the following application form: and need to select the positions IQU-1 and/or IQU-2. Additionally, applicants must email the application material (a cover letter indicating the applied position(s) and justifying your suitability, a detailed CV and complete transcripts, the name and address of two referees to support your application, and any other relevant documents), to Hélène Debrégeas (

Supervisor and enquiries

Host Laboratory III-V Lab, Palaiseau, France.
Secondment Aristotle University of Tessaloniki, Greece.