Alexander Heidt
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Full Professor, Head of Laser Physics Division
SwitzerlandResearch Interests
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About
Professor Alexander Heidt is a Full Professor and the Head of the Laser Physics Division at the University of Bern, Switzerland. His research focuses on advanced topics in laser physics, including ultra-low noise spectral broadening, high-sensitivity pump-probe spectroscopy, and multimode optical fiber technologies. His recent publications reflect a commitment to exploring the frontiers of frequency comb generation and nonlinearity shaping in novel materials, contributing significantly to ultrafast photonics and spectroscopy applications.
Recent Grants
Grant: Close
Glass electrodes conception, manufacturing and testing
Open Date: 2023-01-01
Close Date: 2023-01-01
Grant: Close
Next-generation low-noise gas-filled hollow-core fiber light sources for spectroscopy of ultrafast charge dynamics in solar energy materials
Open Date: 2023-01-01
Close Date: 2024-12-31
Grant: Close
Coherent mid-infrared supercontinuum source for ultra-high resolution optical coherence tomography
Open Date: 2022-02-02
Close Date:
Grant: Close
Advancing photonics for ultrafast science and technology
Open Date: 2019-07-01
Close Date: 2024-06-30
Grant: Close
Next generation mid-IR photonics
Open Date: 2014-01-01
Close Date: 2014-01-01
Articles (7)
Year:
2025
Year:
2024
Rare-earth-doped optical fibres are widely used in lasers and amplifiers. The incorporation of ytterbium and aluminium oxide in a high doping concentration has led to the fabrication of a multi-mode (MM) optical fibre. Within this research, the design, preparation and calculation for the production of a fibre with a targeted 45 μm core diameter are explored. By Energy Dispersive X-ray (EDX) analysis, the doping concentrations of the elements in the core have been measured as 60.4 at.% Al and 1 at.% Yb. Supporting micrographs are used for confirming the core/cladding ratio. Based on the atomic percentage concentration, the calculated refractive index of the multi-element core has an n = 1.61 and an NA = 0.678. Characterisation of the fibre, including absorption and emission cross-section analysis, was performed in order to prove the ability of the fibre to be used for amplification as well as lasing applications.
Year:
2023
Year:
2023
Year:
2023
Year:
2022
Year:
2021
Collaborators (5)
Zhixin Liu
University College London
Justinas Pupeikis
ETH Zürich
Valerio Romano
University of Bern
Anna Peacock
Professor of Photonics
University of Southampton
Yuriy Stepanenko
Institute of Physical Chemistry, Polish Academy of Sciences
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