PhD scholarship in Signal Processing for Multimode Communication

DTU Fotonik
  • Job Type
  • Job Status
    Full Time

DTU Fotonik works with all areas of photonic engineering, and it has a strong focus on optical communications. We are hereby announcing a PhD in Signal processing for multimode communication. This project is part of the Centre of Excellence Silicon Photonics for Optical Communications (SPOC) funded by the Danish National Research Foundation and established in 2015. The SPOC centre was established to aim at significantly advancing the state-of-the-art in ultra-high capacity optical communications and this PhD project will be at the heart of this activity.

This PhD project will study signal processing for future optical communication systems.

Spatial division multiplexing (SDM) will be a key technology to meeting the data rate demand in future optical networks. The PhD project will focus on multiple-input multiple-output (MIMO) signal processing enabling SDM optical communications. Specialized digital MIMO will be designed and optimized jointly with and for the optical multimode channels, incl. MIMO modules, built in-house in SPOC. Optical MIMO modules will include multiplexors and demultiplexors for multimode communication as orbital angular momentum (OAM) communication. Mode and core interference during multi-mode multi-core fiber propagation will also be studied. In order to maximize the data rates of these communication systems, MIMO designs will be combined with multi-dimensional constellation shaping and coding.

The PhD project will be in close collaboration with other activities in SPOC, including activities on novel multimode optical communication.

Responsibilities and qualifications
Your main responsibilities will be to study, identify, implement and design novel signal processing techniques, incl. MIMO to be applied in state of the art optical communication systems based on multimode as OAM and possibly multi-core optical SDM. You will work together with optical scientists on the joint design of digital and optical signal processing for MIMO transmitters and receivers. Successful designs will be part of data rate breaking transmission experiments, which will be conducted in house and in collaboration with the SPOC partners. Your main tasks can be summarized as follows:

  •  Study conventional linear and nonlinear MIMO concepts
  • Study optical SDM communication systems
  • Design signal processing       incl. MIMO transmitter and receiver processors for optical communication with SDM,
  • Design coded modulation systems for maximized throughput of optical SDM systems, including constellation shaping and coding
  • Participate in and contribute to novel communication system experiments

You must have a two-year master's degree (120 ECTS points) or a similar degree with an academic level equivalent to a two-year master's degree.Good communication skills in written and spoken English are a must.

Approval and Enrolment

The scholarship for the PhD degree is subject to academic approval, and the candidate will be enrolled in one of the general degree programmes at DTU. For information about our enrolment requirements and the general planning of the PhD study programme, please see the DTU PhD Guide.


The assessment of the applicants will be made by Professor Søren Forchhammer, Researcher Metodi Yankov and SPOC centre leader Professor Leif Katsuo Oxenløwe.

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 appointment terms

The appointment will be based on the collective agreement with the Danish Confederation of Professional Associations. The allowance will be agreed upon with the relevant union. The period of employment is 3 years.

You can read more about career paths at DTU here.

Further information

Further information may be obtained from Prof. Søren Forchhammer; and Researcher Metodi P. Yankov,

You can read more about DTU Fotonik at

If you are applying from abroad, you may find useful information on working in Denmark and at DTU at DTU – Moving to Denmark.

Application procedure

Your complete online application must be submitted no later than 25 October 2021 Danish 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 out the online application form, and attach all your materials in English in one PDF file. The file must include:


  • A letter motivating the application (cover letter)
  • Curriculum vitae
  • Grade transcripts and BSc/MSc diploma
  • Excel sheet with translation of grades to the Danish grading system (see guidelines and Excel spreadsheet here)

You may apply prior to ob­tai­ning your master's degree but cannot begin before having received it.

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

DTU Fotonik has 210 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 optical sensors, lasers, LEDs, photovoltaics, ultra-high speed optical transmission systems, bio-photonics, nano-optics and quantum 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 12,900 students and 6,000 employees. We work in an international atmosphere and have an inclusive, evolving, and informal working environment. DTU has campuses in all parts of Denmark and in Greenland, and we collaborate with the best universities around the world.


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PhD scholarship in Signal Processing for Multimode Communication

DTU Fotonik

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