Lukas Lang


Last Name

Lang

First Name

Lukas

ORCID

0000-0003-2201-1547

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2016 - 2019192020 - 202520
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Publications 1 - 10 of 39
  • Influence of disk aberrations on high-power thin-disk laser cavities
    Item type: Journal Article
    Seidel, Moritz; Lang, Lukas; Phillips, Christopher R.; et al. (2022)
    Optics Express
    We present a systematic study on the influence of thin-disk aberrations on the performance of thin-disk laser oscillators. To evaluate these effects, we have developed a spatially resolved numerical model supporting arbitrary phase profiles on the intracavity components that estimates the intracavity beam shape and the output power of thin-disk laser oscillators. By combining this model with the experimentally determined phase profile of the thin-disk (measured with interferometry), we can predict the operation mode of high-power thin-disk lasers, including mode degradation, higher-order mode coupling, and stability zone shrinking, all of which are in good agreement with experiment. Our results show that one of the main mechanisms limiting the performance is the small deviation of the disk’s phase profile from perfect radial symmetry. This result is an important step to scaling modelocked thin-disk oscillators to the kW-level and will be important in the design of future active multi-pass cavity arrangements.
  • Influence of Disk Aberrations on High-Power Thin-Disk Laser Cavities
    Item type: Other Conference Item
    Seidel, Moritz; Lang, Lukas; Phillips, Christopher R.; et al. (2022)
    EPJ Web of Conferences ~ 10th EPS-QEOD Europhoton Conference on Solid-State, Fibre, and Waveguide Coherent Light Sources (EUROPHOTON 2022)
  • Image-based autofocusing system for nonlinear optical microscopy with broad spectral tuning
    Item type: Journal Article
    Saerens, Grégoire; Lang, Lukas; Renaut, Claude; et al. (2019)
    Optics Express
    We present an image-based autofocusing system applied in nonlinear microscopy and spectroscopy with a wide range of excitation wavelengths. The core of the developed autofocusing system consists of an adapted two-step procedure maximizing an image score with six different image scorings algorithms implemented to cover different types of focusing scenarios in automated regime for broad wavelength region. The developed approach is combined with an automated multi-axis alignment procedure. We demonstrate the key abilities of the autofocusing procedure on different types of structures: single nanoparticles, nanowires and complex 3D nanostructures. Based on these experiments, we determine the optimal autofocusing algorithms for different types of structures and applications.
  • Ultrafast thin-disk laser oscillator exceeding 400 W average output power using a replicating cavity scheme
    Item type: Other Conference Item
    Seidel, Moritz; Lang, Lukas; Phillips, Christopher R.; et al. (2023)
    Technical Digest Series ~ Ultrafast Optics 2023 - UFOXIII
    We demonstrate a modelocked thin-disk laser oscillator providing 410 W average power with a pulse duration of 751 fs at a repetition rate of 7.77 MHz. This is enabled by a replicating cavity scheme not demonstrated before in high-power or modelocked oscillator operation and the use of sapphire bonded SESAMs.
  • Anapoles in Free-Standing III–V Nanodisks Enhancing Second-Harmonic Generation
    Item type: Journal Article
    Timofeeva, Maria; Lang, Lukas; Timpu, Flavia; et al. (2018)
    Nano Letters
  • Power scaling of ultrafast oscillators: 350-W average-power sub-picosecond thin-disk laser
    Item type: Journal Article
    Saltarelli, Francesco; Graumann, Ivan J.; Lang, Lukas; et al. (2019)
    Optics Express
  • Long-distance dual-comb ranging in real-time with an update rate of 7.7 kHz using a free-running laser
    Item type: Other Conference Item
    Camenzind, Sandro; Lang, Lukas; Willenberg, Benjamin; et al. (2023)
  • 350-W Average-Power SESAM-Modelocked Ultrafast Thin-Disk Laser
    Item type: Conference Paper
    Saltarelli, Francesco; Graumann, Ivan J.; Lang, Lukas; et al. (2019)
    2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)
  • Silicate Bonding of Sapphire to SESAMs: SESAMs with Tunable Thermal Lensing for High-Power Lasers
    Item type: Conference Paper
    Lang, Lukas; Saltarelli, Francesco; Lacaille, G.; et al. (2021)
    2021 Conference on Lasers and Electro-Optics (CLEO)
    We demonstrate for the first time silicate bonding of a SESAM to a sapphire superstrate to control the sign and magnitude of the SESAMs thermal lensing. We demonstrate modelocking in a 233-W average-power thin-disk laser.
  • Soliton-Modelocked Thin-Disk Laser Oscillator with 350 W Average Power and Sub-ps Pulses
    Item type: Conference Paper
    Saltarelli, Francesco; Graumann, Ivan J.; Lang, Lukas; et al. (2019)
    OSA Technical Digest ~ Laser Congress 2019
Publications 1 - 10 of 39