In his doctoral dissertation, MSc (Tech) Ifte Khairul Alam Bhuiyan developed compact III–V semiconductor light sources for optical coherence tomography (OCT) operating at longer infrared wavelengths around 2 µm. His research introduced novel GaSb quantum well–based superluminescent diodes capable of generating broadband emission in a state-of-the-art compact chip-scale platform. A central outcome of the work was the demonstration of high-performance emission near 2 µm wavelength, where reduced light scattering in many materials can enable deeper penetration, providing a practical alternative to the bulky and expensive supercontinuum light sources. The results expand the potential of OCT for applications including non-destructive industrial inspection, while advancing the fundamental understanding of broadband light generation in the mid-IR regime.
The research was carried out at the Optoelectronics Research Centre (ORC) research group as part of EU Marie Skłodowska-Curie doctoral network NETLAS (NExt generation of Tunable LASers for optical coherence tomography), which focuses on advancing semiconductor light source technologies for OCT applications.
The doctoral dissertation of MSc (Tech) Ifte Khairul Alam Bhuiyan in the field of Photonics titled “Broadband Superluminescent Diodes at 2 µm Wavelength Range for Optical Coherence Tomography” will be publicly examined in the Faculty of Engineering and Natural Sciences at Tampere University on Friday 5 June 2026.
The Opponent will be Professor Tapio Fabritius from the Oulu University. The Custos will be Professor Mircea Guina from the ORC, Faculty of Engineering and Natural Sciences, Tampere University.
