Doctoral Student in Optical Communications and Fiber Sensing Chalmers University of Technology in Sweden

Chalmers University of Technology invites applications for a fully funded PhD position in Optical Communications and Fiber Sensing, located in Gothenburg, Sweden. The position is based in the Division of Communications, Antenna, and Optical Networks within the Department of Electrical Engineering, and is part of the FORCE research center, which brings together experts in communications, photonics, and electronics to address challenges in optical communications through a cross-disciplinary approach.

The research project explores the dual role of fiber-optic cables: while designed for data transmission, they can also serve as large-scale sensors of the physical environment. The project investigates both the opportunities and risks associated with fiber sensing, including infrastructure monitoring, environmental awareness, and unintended information leakage such as the detectability of human activity or speech-related vibrations. The aim is to develop new numerical models, advanced machine learning algorithms, and signal processing methods to understand what information can be inferred from optical communication signals, and to assess implications for privacy, security, and system design.

The PhD student will be supervised by Assistant Professor Christian Häger, in collaboration with Professor Magnus Karlsson (IEEE & Optica Fellow), Professor Mats Viberg, and Associate Professor Marija Furdek. The research team offers a strong international network, with opportunities for research visits abroad (e.g., Germany, Netherlands, UK, USA). The position is fully funded for four years by a prestigious grant from the Swedish Research Council, with a starting salary of 34,550 SEK per month (as of May 2025), full social benefits, health insurance, no tuition fees, and financial support for relocation. Teaching duties may extend the position up to five years.

Applicants must hold a Master's degree (or equivalent) in Electrical Engineering, Engineering Physics, Computer Science, Applied Mathematics, or closely related fields. For students educated outside Sweden, a 4-year Bachelor's degree is accepted. A strong background in digital communications, signal processing, and machine learning is required, with excellent grades in core courses. Experience in implementing and simulating digital communication systems (e.g., Python or Matlab), and courses or experience in optical communication systems and/or fiber sensing are advantageous. Strong written and verbal communication skills in English are mandatory. Swedish language skills are not required; optional Swedish courses are available.

As a doctoral student at Chalmers, you are an employee and enjoy all employee benefits, including generous parental leave, subsidized day care, free schools, and healthcare. The university is committed to gender balance and equality, with initiatives such as the GENIE project. The position requires physical presence throughout the study period, and a valid residence permit must be presented by the start date.

To apply, prepare your application in English and attach all required documents as PDF files (CV, personal letter, transcripts, degree certificates, theses). Use the online application form via the provided link; do not send applications by email. Ensure your application is complete, as incomplete submissions will not be considered. References will be requested after the interview. The application deadline is February 28, 2026.

For questions about the position, contact Assistant Professor Christian Häger at [email protected] (questions only; do not send application documents).

Chalmers University of Technology is a leading European technical university, dedicated to scientific excellence and sustainable solutions for societal challenges. The university fosters an innovative spirit through global collaboration and entrepreneurship.