PhD9: Marie Klufts

Host: University of Lübeck 

Secondments: Optores GmbH, University of Kent, Applied Optics Group (AOG)/with guidance from UCL Institute of Ophthalmology and Moorfields Eye Hospital

PhD Project: Short wavelength FDML lasers

More than 60% of OCT applications are in imaging the retina of the human eye, 800–1100 nm represents the main wavelength range. There is still no commercially available swept source at 800 nm operating at over tens of kHz tuning rates. The project aims to develop a new fast 800 nm FDML at >1MHz wavelength sweep repetition rate with a tuning bandwidth of more than 60 nm and a long coherence length. This will allow swept source OCT system with the typical image contrast and look known from 800nm SD-OCT and provide improved transversal resolution. This laser will be used in a OCT system for biomedical imaging.

Completed workshops, Seminars, and Conferences:

  • International Day of light conference – Tampere University, Finland, OCT & photonics, Online Poster presentationTowards an 800 nm FDML Laser”, 20-21/05/2021,
  • Photonics West – San Francisco, Conference paper + Oral presentation “Ultra-high-accuracy chromatic dispersion measurement in optical fibers, 24-26/01/2022
  • Winter School – DTU Copenhagen, Denmark, Title oral presentation  “850 nm FDML Laser“,  01-04/03/2022
  • University of Kent, Title Poster presentation 850 nm FDML Laser“, 23-27/05/2022
  • Autumn School – TUD Darmstadt, Germany, Title oral presentation “850 nm FDML Laser“, 04-07/10/2022
  • Photonics West – San Francisco, Conference paper + Oral presentation “850 nm FDML: Performance and challenges, 30/01/2023
  • NETLAS Conference in conjunction with Markus Pessa International Summer School “New Frontiers in Optical Technologies”, Title oral presentation “828 kHz retinal imaging with an 840 nm Fourier domain mode-locked laser” August 7 – 11, 2023, Tampere, Finland


  • M. Klufts, S. Lotz, M. Bashir, S. Karpf and R. Huber, “Ultra-high-accuracy chromatic dispersion measurement in optical fibers”, Optical Components and Materials XIX, no. 11997, pp. 146 – 152, SPIE, 2022,
  • Marie Klufts, Alejandro Martínez Jiménez, Simon Lotz, Muhammad Asim Bashir, Tom Pfeiffer, Alexander Mlynek, Wolfgang Wieser, Alexander Chamorovskiy, Adrian Bradu, Adrian Podoleanu, and Robert Huber, “828 kHz retinal imaging with an 840 nm Fourier domain mode locked laser,” Biomed. Opt. Express 14, 6493-6508 (2023)
  • M. Klufts, S. Lotz, M. A. Bashir, T. Pfeiffer, A. Mlynek, W. Wieser, A. Chamorovskiy, V. Shidlovski, R. Huber, “850 nm FDML: performance and challenges,” Proc. SPIE 12367, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVII, 1236705 (8 March 2023);
  • M. A. Bashir, S. Lotz, M. Klufts, I. Krestnikov, C. Jirauschek, R. Huber, “1190 nm Fourier domain mode locked (FDML) laser for optical coherence tomography (OCT),” Proc. SPIE 12367, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXVII, 1236707 (8 March 2023);
  • Klufts, M., Lotz, S., Bashir, M. A., Pfeiffer, T., Mlynek, A., Wieser, W., Chamorovskiy, A., Shidlovski, V., Podoleanu, A. and Huber, R. , “Dual Amplification 850 nm FDML Laser,” 2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), Munich, Germany, 2023, pp. 1-1, doi: 10.1109/CLEO/Europe-EQEC57999.2023.10232019.

Previous education:

After my preparatory class specialized in mechanics and physics, I continued my studies in biomedical engineering in France. During these 5 years, I had the opportunity to do several internship focusing on photonics. The first one at Femto-st allowed me to discover OCT. Then I had the opportunity to work with MD. Nicolas MOTTET in the study of fetal lung development by elastography. Lastly, I did a 3 month internship at the University of Auckland with Dr. Frédérique VANHOLSBEECK and Matthew GOODWIN on the early detection of osteoarthritis by PS-OCT.