As an optical signal propagates through a fiber, it is distorted by chromatic dispersion. On the receiver side, the signal further experiences phase noise from the local oscillator. Compensating chromatic dispersion without consideration of the phase noise enhances the latter, which is referred to as equalization-enhanced phase noise (EEPN). 

Depending on the student's interests, the thesis can focus on different aspects of EEPN, e.g., proper modeling or mitigation. 

For this thesis, the student works for Nokia, but is jointly supervised and can expect close supervision from both sides. We aim to start the thesis on 7 January 2026.

Prerequisites

Please reach out if you are interested in a thesis in any of my research fields. Possible areas include optical communications, particularly physical modeling and nonlinearity mitigation for single-mode fiber, and aspects of receiver design, such as receivers for channels with memory.
A good background in optical communication systems and applied information theory is preferable, but the requirements generally depend on your interests.
Please include a description of your interests and corresponding academic background in your application. If you have a thesis idea, I am happy to discuss your suggestions. Also, I am available to supervise external theses as long as they are in my field of expertise.

Investigate SIC to reduce the impact of intermodal crosstalk in multimode fibers.