Postdoc in High-throughput Coding for Optical Communication

Kongens Lyngby (DK)
Wednesday, 20 November 2019
End of advertisement period
Thursday, 9 January 2020
Contract Type
Fixed Term
Full Time

Postdoc in High-throughput Coding for Optical Communication

As postdoc in this project, you will be part of the research activities on coding for optical communication in the INCOM project funded by Innovation Fund Denmark (IFD) and positioned within the Coding and Visual Communication Group, which is part of the Communication Technology Section at DTU Fotonik.

DTU Fotonik has an international and strong cutting edge focus on optical communications and coding and as a department; it covers all areas of photonic engineering.

Responsibilities and tasks

We are seeking a candidate to work on advanced high-throughput coding for optical communication. The focus will be on fast forward error-correction (FEC). The applications include Data Center Interconnects and optical core networks.  

Error-correction codes (ECC) are vital in contemporary optical communication systems to achieve highly efficient and highly reliable communication. You will be conducting research on high-throughput, FEC for optical communication, striving for Tbit/s communication at output bit-error rates of 10-15 and better.

For high performance, soft-decision (SD) FEC will be applied. One scheme for the research work is concatenated coding with an inner SD FEC. For high-speed and high-reliability, a fast hard-decision (HD) FEC, is a good choice for the outer code. For enhanced performance, SD decoding of the outer code will also be investigated. The goal is to design novel high-performance high-throughput coding schemes for Data Center Interconnects and optical core networks.    

The coding can include both FEC and coding for probabilistic constellation shaping, e.g. in coded modulation communication schemes using higher order modulation. The performance shall be evaluated by analysis and simulations and compared with information theoretic bounds.

Striving for Tbit/s throughput, fast algorithms are a vital part of the research. This includes analysis of the influence on the performance and potentially important implementation aspects as energy efficiency.

The postdoc project will be part of the INCOM project centred at DTU Fotonik, and it will be in close collaboration with other coding activities within the INCOM project. Experimental lab work and demonstrations of selected devised coding schemes in optical transmission can be a part of this joint work.

Apart from the research outlined above, the postdoc position may involve a limited amount of teaching mainly in the form of supervising student projects, incl. PhD level.


Candidates should have

  • a PhD degree or equivalent within coding for communication
  • a strong background in coding for communication is required
  • experience with coding for optical communication, coded modulation, rate-adaptive probabilistic constellation shaping and high order modulation schemes is a plus

We offer

DTU is a leading technical university globally recognized for the excellence of its research, education, innovation and scientific advice. We offer a rewarding and challenging job in an international environment. We strive for academic excellence in an environment characterized by collegial respect and academic freedom tempered by responsibility.

Salary and terms of employment

The appointment will be based on the collective agreement with the Confederation of Professional Associations. The allowance will be agreed with the relevant union. The period of employment is one year.

Further information

Further information may be obtained from Professor Søren Forchhammer,, tel.: +45 4525 3622.

Application procedure:

Please submit your online application no later than 9 January 2020 (local time). Apply online at

Applications must be submitted as one PDF file containing all materials to be given consideration. To apply, please open the link "Apply online," fill in the online application form, and attach all your materials in English in one PDF file. The file must include:

  • Application (cover letter)
  • CV
  • Diploma (MSc/PhD)
  • List of publications

Applications and enclosures received after the deadline will not be considered.

All interested candidates irrespective of age, gender, disability, race, religion or ethnic background are encouraged to apply.

DTU Fotonik has 220 employees with competences in optics and is one of the largest centers in the world based solely on research in photonics. Research is performed within communication technology, ultra-high speed optical transmission systems, optical sensors, lasers, LEDs, photovoltaics, bio-photonics, nano-optics and quantum communication and photonics.

Technology for people

DTU develops technology for people. With our international elite research and study programmes, we are helping to create a better world and to solve the global challenges formulated in the UN’s 17 Sustainable Development Goals. Hans Christian Ørsted founded DTU in 1829 with a clear vision to develop and create value using science and engineering to benefit society. That vision lives on today. DTU has 11,500 students and 6,000 employees. We work in an international atmosphere and have an inclusive, evolving, and informal working environment. Our main campus is in Kgs. Lyngby north of Copenhagen and we have campuses in Roskilde and Ballerup.

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