Postdoc in Optical Fiber Sensing

tirsdag 14 sep 21

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Frist 1. oktober 2021
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If you aim at scientific excellence and want to establish a career as a scientist within development of optical fiber devices, then we have the ideal opportunity for you.

In modern electrical power systems, where an increasing amount of the electricity is produced by sustainable energy sources, such as windmills and solar cells, the use of power electronics gets more and more widespread. Unfortunately, the use of power electronics also introduce noise by generating higher harmonics with frequencies beyond the MHz range. Currently, it is not possible to measure voltages with MHz frequency bandwidths in high voltage systems. Poled optical fibers has the potential of achieving this, but currently only provide limited sensitivity. In this project, you will develop a fiber sensor based on few-moded poled fibers, which is capable of achieving the desired sensitivity and long-term stability. Hereby paving the way for a green future for us all.

Responsibilities and qualifications
You will be responsible for design and development of the optical voltage sensor. The effort within the position includes basic experimental design and characterization of voltage sensors using a test bench that you in part will establish. The poled fibers for the sensor will be fabricated at RISE in Stockholm, Sweden. Thus during the project, you are expected to make multiple visits to RISE, totaling up to 6 months.

The main responsibilities and tasks include:

  • Establish a setup for measuring electric field response.
  • Characterize the performance of currently available poled fibers.
  • Aid in developing an optimal fiber design.
  • Assist in fabricating custom fiber designs at RISE, Sweden.
  • Characterize the optimized few-mode fiber.
  • Evaluate the performance of the developed prototype fiber sensor.

In the project, your contribution will mainly involve experimental work, which may be supported by necessary theoretical/numerical predictions.

As a formal qualification, you must hold a PhD degree (or equivalent). Candidates with prior knowledge within experimental research in optical fiber technologies, single-mode and/or multimode fiber optics, and data processing will be preferred. However, candidates with a strong background within any aspect of experimental fiber optics are encouraged to apply. 

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 Danish Confederation of Professional Associations. The allowance will be agreed upon with the relevant union. The period of employment is 2 years, ideally starting in the fall of 2021.

You can read more about career paths at DTU here.

Further information
Further information may be obtained from Lars Rishøj ( 

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 1 October 2021 (Danish time)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:

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

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 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.