PhD3: Philipp Tatar-Mathes

Host: Tampere University

Secondment: OCTLight

PhD Project: Broadband gain blocks for amplified swept source

In optically pumped membrane external-cavity surface emitting lasers (MECSELs), power scalability in to the WATT level is given while providing a high beam quality (M² ≈1.0). Also, yet uncovered wavelength ranges can be reached with this approach. The gain can be designed via choosing a constellation of different quantum well or quantum dot layers to cover a wide spectral range. Modern Fourier-domain OCT needs broadband coherent light sources with fast sweepable emission. MECSELs could provide these demands.

Completed workshops, Seminars, and Conferences:

  • International Day of light conference – Tampere University, Finland, OCT & photonics, 20-21/05/2021
  • Advances in 3OM: Opto-Mechatronics, Opto-Mechanics and Optical Metrology, 13-16/12/2021, Oral presentation/ MECSELs/ Exploring red-emitting MECSELs for OCT applications
  • Winter School – DTU Copenhagen, Denmark, Title oral presentation  “High Power Master Oscillator Power Amplifier (MOPA) devices based on DQW structures at 1060 nm“,  01-04/03/2022
  • Autumn School – TUD Darmstadt, Germany, Title oral presentation “High power master oscillator power amplifier (MOPA) devices“, 04-07/10/2022
  • NETLAS Conference in conjunction with Markus Pessa International Summer School “New Frontiers in Optical Technologies”, Title oral presentation “Influence of SiOx and SiNx film deposition parameters on the InGaAs/GaAs quantum well intermixing by impurity-free vacancy disordering” August 7 – 11, 2023, Tampere, Finland
  • 2nd International Conference on “Advances in 3OM: Opto-Mechatronics, Opto-Mechanics, Optical Metrology” 11–14 December 2023, Timisoara, Romania, Oral presentation,  Conf. link- https://3om-group-optomechatronics.ro/advances-in-3om-conference-2023/

Publications:

  • P. Tatar-Mathes, H.-M. Phung, A. Rogers, P. Rajala, S. Ranta, H. Kahle, M. Guina, “Resonant and off-resonant designs of membrane external-cavity surface-emitting lasers emitting at 800 nm,” 2021 27th International Semiconductor Laser Conference (ISLC), 2021, pp. 1-2 (2021). https://doi.org/10.1109/ISLC51662.2021.9615818
  • H. Kahle, H. -M. Phung, P. Tatar-Mathes, P. Rajala and M. Guina, “Membrane external-cavity surface-emitting lasers for high power broadband emission in the 1 µm range,” 2021 27th International Semiconductor Laser Conference (ISLC), pp. 1-2 (2021). https://doi.org/10.1109/ISLC51662.2021.9615904
  • H.-M. Phung, P. Tatar-Mathes, A. Rogers, P. Rajala, S. Ranta, H. Kahle, M. Guina, “Thermal management analysis of a membrane external cavity surface-emitting laser (MECSEL) “2021 27th International Semiconductor Laser Conference (ISLC), pp. 1-2 (2021). https://doi.org/10.1109/ISLC51662.2021.9615757  
  • Hoy-My Phung, Philipp Tatar-Mathes, Cyril Paranthoen, Christophe Levallois, Nicolas Chevalier, Hermann Kahle, Mehdi Alouini, Mircea Guina, “Quantum dot membrane external-cavity surface-emitting laser (MECSEL) at 1.5 µm,” 2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2021, doi: 10.1109/CLEO/Europe-EQEC52157.2021.9542252
  • Patrik Rajala, Philipp Tatar-Mathes, Hoy-My Phung, Jesse Koskinen, Sanna Ranta, Mircea Guina, Hermann Kahle, “Design and characterization of MECSELs for widely tunable (>25 THz) continuous wave operation,” Proc. SPIE 11984, Vertical External Cavity Surface Emitting Lasers (VECSELs) XI, 1198404, 2022. https://doi.org/10.1117/12.2610649
  • Hoy-My Phung, Philipp Tatar-Mathes, Aaron Rogers, Patrik Rajala, Sanna Ranta, Hermann Kahle, Mircea Guina, “Thermal behavior and management of membrane external-cavity surface-emitting lasers (MECSELs),” Proc. SPIE 11984, Vertical External Cavity Surface Emitting Lasers (VECSELs) XI, 1198402, 2022. https://doi.org/10.1117/12.2610644
  • Philipp Tatar-Mathes, Hoy-My Phung, Aaron Rogers, Patrik Rajala, Sanna Ranta, Hermann Kahle, Mircea Guina, “Towards red-emitting MECSELs for visible-light OCT applications” Proceedings Volume 12170, Advances in 3OM: Opto-Mechatronics, Opto-Mechanics, and Optical Metrology; 1217003 (2022) https://doi.org/10.1117/12.2592919, Event: Advances in 3OM: Opto-Mechatronics, Opto-Mechanics, and Optical, Metrology, 2021, Timisoara, Romania
  • Hermann Kahle, Philipp Tatar-Mathes, Patrik Rajala, Mircea Guina, “Membrane external-cavity surface-emitting lasers (MECSELs): State of the art in broadband (> 25 THz) tuning and antiresonant gain structure design” Proceedings Volume PC12141, Semiconductor Lasers and Laser Dynamics X; PC1214109 (2022), https://doi.org/10.1117/12.2632734, Event: SPIE Photonics Europe, 2022, Strasbourg, France
  • oy-My Phung, Philipp Tatar-Mathes, Aaron Rogers, Patrik Rajala, Sanna Ranta, Hermann Kahle, and Mircea Guina, “Thermal behavior and power scaling potential of membrane external-cavity surface-emitting lasers (MECSELs),” in IEEE Journal of Quantum Electronics, 2022. doi: 10.1109/JQE.20223147482.
  • P. Tatar-Mathes et al., “Effect of Non-Resonant Gain Structure Design in Membrane External-Cavity Surface-Emitting Lasers,” in IEEE Photonics Technology Letters, vol. 35, no. 12, pp. 657-659, 15 June 15, 2023, doi: 10.1109/LPT.2023.3270404

Previous education:

 B.Sc. and M.Sc. theses at the Institute for Semiconductor Optics and Functional Interfaces (IHFG) at the University of Stuttgart, deep insight and understanding of the full fabrication procedure of semiconductor disk laser structures with different designs. Learned the complete experimental characterization methods. Currently PhD-student in Mircea Guina’s group at the Optoelectronics Research Centre (ORC), at Tampere University, Finland.