Dr. Xiaonan Yu from the Changchun University of Science & Technology in China has been working in our research group for a scientific exchange since 17.11.2023. During his stay at our institute, he worked on the investigation of photonically assisted methods for signal processing and of methods for their integration on a silicon photonics platform. After a good year, his research stay in Germany is now coming to an end, which is why it was time to say goodbye at a joint dinner on 12.11.2024.
On 21.06.24, our colleague Janosch Meier defended his doctoral thesis on Optical sampling with sinc sequences.
Examination Board:
Chairman - Prof. Dr.-Ing. Eduard A. Jorswieck, TU BS
First examiner - Prof. Dr. rer. nat. Thomas Schneider, TU BS
Second examiner - Einstein-Prof. Dr.-Ing. Friedel Gerfers, TU Berlin
In his doctoral thesis, Mr Meier is investigating how so-called sinc pulse sequences (SPS), i.e. periodic sine cardinalis (sinc) pulses, can be used to sample signals with as few errors as possible. SPS have been researched by the THz-Photonics Group at TU-Braunschweig for some time, as they can be used for many different applications from agnostic transceivers to digital-to-analogue conversion and the processing of broadband signals with narrowband electronics. Mr Meier's work focuses primarily on the mathematical background and interrelationships of the generation and application of SPS.
On 19.06.24, our colleague Sabahat Shaheen defended her doctoral thesis on Distributed Acoustic Sensing using Geometric Phase and its application to Seismology.
Examination Board:
Chairman - Prof. Dr. Andrey Surzhykov, TU BS
First examiner - Prof. Dr rer. nat. Thomas Schneider, TU BS
Second examiner - Prof. Gilberto Brambilla, University of Southampton
The thesis of Ms. Shaheen is a cumulative one and based on journal and conference papers, one of which in the Nature journal Scientific Reports. The experimental work for the thesis has been carried out at the Bundesanstalt für Materialforschung und -prüfung (BAM) in Berlin.
The subject of the thesis is a novel scheme for the distributed and dynamic sensing of strain along a fiber based on the geometric phase. In her publications Ms. Shaheen proposes to use this geometric phase for distributed and dynamic acoustic sensing for the first time.
On 29.05.24, our colleague Mohammed Ibrahim Hosni Elsayed defended his doctoral thesis on Photonics-Assisted High Data Rate Communications.
Examination Board:
Chairman - Prof. Dr.-Ing. Thomas Kürner, TU BS
First examiner - Prof. Dr. rer. nat. Thomas Schneider, TU BS
Second examiner - Prof. Dr.-Ing. Maurizio Burla, TU Berlin
In his dissertation, Mr Elsayed is investigating new methods of photonics-based signal processing that can be used for the generation, detection and processing of high data rate and high bandwidth signals.