Dr. Stefan Kuhn Profile

Dr. Stefan Kuhn

at Fraunhofer-Institut für Angewandte Optik und Feinmechanik IOF

SPIE Involvement:

Author

Publications (30)

Proceedings Article | 20 June 2024 Presentation

Presentation

Limitations and perspectives in power scaling of fiber lasers

Till Walbaum, Maximilian Strecker, Marco Plötner, Friedrich Möller, Gonzalo Palma-Vega, Steffen Trautmann, Carolin Rothhardt, Stefan Kuhn, Nicoletta Haarlammert, Thomas Schreiber

Proceedings Volume PC13003, PC130030A (2024) https://doi.org/10.1117/12.3024100

KEYWORDS: Fiber lasers, Multicore fiber, Design, Transverse mode instability, Thermal effects, Miniaturization, Laser systems engineering, Fiber amplifiers, Dopants, Beam combiners

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Proceedings Article | 20 June 2024 Presentation

Presentation

Static and dynamic mode interaction in high-average power PM fibers

G. Palma-Vega, D. Hässner, F. Möller, S. Kuhn, J. Nold, N. Haarlammert, T. Schreiber

Proceedings Volume PC13001, PC1300104 (2024) https://doi.org/10.1117/12.3022194

KEYWORDS: Polarization, Transverse mode instability, Polarization maintaining fibers, Refractive index, Numerical simulations, Frequency modulation, Fermium, Cladding, Anisotropy, High power lasers

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Proceedings Article | 12 March 2024 Presentation + Paper

Presentation + Paper

Temperature-dependent fluorescence and site-selective excitation studies of ytterbium doped silica

Brian Topper, Alexander Neumann, Stefan Kuhn, Denny Häßner, Sigrun Hein, Christian Hupel, Johannes Nold, Nicoletta Haarlammert, Arash Mafi, Thomas Schreiber

Proceedings Volume 12865, 128650F (2024) https://doi.org/10.1117/12.3000259

KEYWORDS: Absorption, Silica, Fluorescence, Ytterbium, Fiber lasers, Emission wavelengths, Spectroscopy, Glasses

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Proceedings Article | 12 March 2024 Paper

Paper

High-precision adjustment of the refractive index in high-power laser fibers

Nicoletta Haarlammert, Johannes Nold, Gonzalo Palma-Vega, Stefan Kuhn, Jens Limpert, Thomas Schreiber

Proceedings Volume 12865, 128650G (2024) https://doi.org/10.1117/12.3000567

KEYWORDS: Refractive index, Silica, Manufacturing, Fiber lasers, Structured optical fibers

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Proceedings Article | 12 March 2024 Paper

Paper

Extraction of 100-mJ level pulse energy at high repetition rates by a ns-class, 49-core fiber laser

Mehran Bahri, Arno Klenke, Cesar Jauregui, Stefan Kuhn, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Jens Limpert

Proceedings Volume 12865, 1286505 (2024) https://doi.org/10.1117/12.3002542

KEYWORDS: Multicore fiber, Fiber lasers, Oscillators, Fiber amplifiers, Q switching, Laser applications, Extreme ultraviolet, Pulsed fiber lasers

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Proceedings Article | 12 March 2024 Paper

Paper

Mitigation of transverse mode instability by polarization rotation in high-power PM fiber amplifiers

Gonzalo Palma-Vega, Denny Hässner, Stefan Kuhn, Johannes Nold, Friedrich Möller, César Jáuregui, Andreas Tünnermann, Jens Limpert, Nicoletta Haarlammert, Thomas Schreiber

Proceedings Volume 12865, 1286504 (2024) https://doi.org/10.1117/12.3001675

KEYWORDS: Transverse mode instability, Polarization, Fiber amplifiers, Birefringence, Refractive index

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Proceedings Article | 12 March 2024 Paper

Paper

NA-dependent absorption in double clad multicore amplifier fibers

Benjamin Yildiz, Denny Häßner, Stefan Kuhn, Till Walbaum, Nicoletta Haarlammert, Thomas Schreiber

Proceedings Volume 12865, 1286510 (2024) https://doi.org/10.1117/12.3002478

KEYWORDS: Absorption, Multicore fiber, Cladding, Light absorption, Fiber amplifiers, Near field, Cameras, Sodium, Iris, Whispering gallery modes

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Proceedings Article | 9 March 2024 Presentation

Presentation

Tuning specialty co-doped optical silica fibers for sensing applications

Tobias Habisreuther, Sonja Unger, Anett Reichert, Claudia Aichele, Florian Lindner, Stefan Kuhn, Adrian Lorenz, Jörg Bierlich, Anka Schuchow, Tina Eschrich, Kay Schaarschmidt, Martin Lorenz, Katrin Wondraczek

Proceedings Volume PC12882, PC128820E (2024) https://doi.org/10.1117/12.3002626

KEYWORDS: Optical fibers, Optical properties, Codoping, Materials properties, Dopants, Structured optical fibers, Silica, Refractive index, Optical design, Germanium

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Proceedings Article | 8 March 2024 Presentation + Paper

Presentation + Paper

Multi-core optical fibers with adapted functionalities for imaging and sensing applications

S. Unger, A. Reichert, C. Aichele, F. Lindner, S. Kuhn, A. Lorenz, J. Bierlich, A. Schwuchow, T. Eschrich, K. Schaarschmidt, M. Lorenz, K. Wondraczek, T. Habisreuther

Proceedings Volume 12882, 128820F (2024) https://doi.org/10.1117/12.3002680

KEYWORDS: Refractive index, Germanium, Aluminum, Acoustics, Silica, Optical fibers, Dopants, Doping, Fiber Bragg gratings, Diffusion

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Proceedings Article | 23 October 2023 Presentation

Presentation

Overview and perspectives of fiber laser power scaling

Till Walbaum, Friedrich Möller, Marco Plötner, Maximilian Strecker, Benjamin Yildiz, Johannes Nold, Stefan Kuhn, Nicoletta Haarlammert, Thomas Schreiber

Proceedings Volume PC12739, PC1273903 (2023) https://doi.org/10.1117/12.2688504

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Proceedings Article | 15 March 2023 Presentation + Paper

Presentation + Paper

Laser cooling silica: current status and future prospects

Brian Topper, Alexander Neumann, Alexander Albrecht, Angel Flores, Stefan Kuhn, Denny Häßner, Sigrun Hein, Christian Hupel, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Mansoor Sheik-Bahae, Arash Mafi

Proceedings Volume 12437, 1243703 (2023) https://doi.org/10.1117/12.2655228

KEYWORDS: Ytterbium, Silica, Fluorescence, Glasses, Aluminum, Spectroscopy, Emission wavelengths, Air force, Absorption, Temperature metrology

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Proceedings Article | 8 March 2023 Presentation + Paper

Presentation + Paper

Analysis and fabrication of tapered multicore gain fibers for high power lasers

Christopher Aleshire, Albrecht Steinkopff, Arno Klenke, Cesar Jauregui, Steffen Böhme, Tobias Koch, Stefan Kuhn, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Jens Limpert

Proceedings Volume 12400, 1240013 (2023) https://doi.org/10.1117/12.2650508

KEYWORDS: Multicore fiber, Beam propagation method, High power lasers, Fiber lasers

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Proceedings Article | 8 March 2023 Presentation + Paper

Presentation + Paper

The impact of core size scaling on the transverse mode instability threshold in fiber laser amplifiers

Sobhy Kholaif, Mehran Bahri, Arno Klenke, Cesar Jauregui, Johannes Nold, Nicoletta Haarlammert, Stefan Kuhn, Thomas Schreiber, Jens Limpert

Proceedings Volume 12400, 124000W (2023) https://doi.org/10.1117/12.2651074

KEYWORDS: Transverse mode instability, Fiber lasers, Laser damage threshold, Design and modelling, Beam diameter, Photonic crystal fibers, Photonics, Manufacturing, Thermal optics, Single mode fibers

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Proceedings Article | 8 March 2023 Presentation + Paper

Presentation + Paper

Mitigation of transverse mode instability in large mode area polarization maintaining fibers

Gonzalo Palma-Vega, Denny Hässner, Stefan Kuhn, Friedrich Möller, César Jáuregui, Nicoletta Haarlammert, Thomas Schreiber

Proceedings Volume 12400, 124000U (2023) https://doi.org/10.1117/12.2650342

KEYWORDS: Transverse mode instability, Polarization, Refractive index, Fiber amplifiers, Photodiodes, Polarization maintaining fibers, Wave plates, Signal attenuation, Frequency modulation, Fiber lasers

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Proceedings Article | 8 March 2023 Presentation + Paper

Presentation + Paper

Optical core-to-core crosstalk in rod-type multicore fibers

Albrecht Steinkopff, Christopher Aleshire, Arno Klenke, Cesar Jauregui, Johannes Nold, Stefan Kuhn, Nicoletta Haarlammert, Thomas Schreiber, Jens Limpert

Proceedings Volume 12400, 124000Z (2023) https://doi.org/10.1117/12.2650040

KEYWORDS: Multicore fiber, Crosstalk, Optical simulations

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Proceedings Article | 2 December 2022 Poster + Presentation + Paper

Poster + Presentation + Paper

Non-destructive testing of subsurface damage for early indication of laser-induced damage threshold in fused silica

Anne-Sophie Munser, Marcus Trost, Christian Mühlig, Nora Tadewaldt, Stefan Kuhn, Luisa Coriand, Ulf Hallmeyer

Proceedings Volume 12300, 123000K (2022) https://doi.org/10.1117/12.2642749

KEYWORDS: Light scattering, Scattering, Polishing, Nondestructive evaluation, Absorption, Laser induced damage, Etching, Surface finishing, Silica, Statistical analysis

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Proceedings Article | 3 November 2022 Presentation

Presentation

Analysis and manipulation of thermally induced modal instabilities in high-power fiber lasers (Conference Presentation)

Till Walbaum, Friedrich Möller, Maximilian Strecker, Benjamin Yildiz, Stefan Kuhn, Nicoletta Haarlammert, Thomas Schreiber

Proceedings Volume 12273, 122730C (2022) https://doi.org/10.1117/12.2645232

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Proceedings Article | 9 March 2022 Presentation

Presentation

Advances in the optical refrigeration of silica: cooling by 18 K from room temperature

Brian Topper, Mostafa Peysokhan, Alexander Albrecht, Angel Flores, Stefan Kuhn, Denny Häßner, Sigrun Hein, Christian Hupel, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Mansoor Sheik-Bahae, Arash Mafi

Proceedings Volume PC12018, PC1201808 (2022) https://doi.org/10.1117/12.2610103

KEYWORDS: Silica, Optical fibers, Ytterbium, Temperature metrology, Thermometry, Optical amplifiers, Luminescence, High power fiber amplifiers, Glasses, Cameras

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Proceedings Article | 4 March 2022 Presentation + Paper

Presentation + Paper

500 W average power, multicore fiber-based femtosecond CPA system

Arno Klenke, A. Steinkopff, C. Aleshire, C. Jauregui, Stefan Kuhn, Johannes Nold, Christian Hupel, Sigrun Hein, Steffen Schulze, Nicoletta Haarlammert, Thomas Schreiber, Andreas Tünnermann, Jens Limpert

Proceedings Volume 11981, 119810E (2022) https://doi.org/10.1117/12.2609380

KEYWORDS: Femtosecond phenomena, Reflectivity, Fiber amplifiers, Beam splitters, Polarization, Mirrors, Fiber lasers, Wave plates, Laser systems engineering, Structured optical fibers

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Proceedings Article | 4 March 2022 Presentation + Paper

Presentation + Paper

High energy oscillator-amplifier with tapered rod-type multicore fiber

Christopher Aleshire, Albrecht Steinkopff, Maximilian Karst, Arno Klenke, Cesar Jauregui, Stefan Kuhn, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Jens Limpert

Proceedings Volume 11981, 1198108 (2022) https://doi.org/10.1117/12.2609569

KEYWORDS: High power fiber lasers, Q switched fiber lasers, Fiber lasers, Fiber amplifiers, Optical amplifiers, Q switching, Oscillators, High power fiber amplifiers, Coherent beam combination

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Proceedings Article | 4 March 2022 Presentation

Presentation

Anti-Stokes fluorescence cooling of ytterbium doped silica glass for radiation-balanced fiber lasers

Brian Topper, Mostafa Peysokhan, Alexander Albrecht, Angel Flores, Stefan Kuhn, Denny Häßner, Sigrun Hein, Christian Hupel, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Mansoor Sheik-Bahae, Arash Mafi

Proceedings Volume PC11981, PC119810N (2022) https://doi.org/10.1117/12.2615241

KEYWORDS: Fiber lasers, Silica, Ytterbium, Luminescence, Glasses

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Proceedings Article | 9 March 2021 Presentation + Paper

Presentation + Paper

Simplified manufacturing of advanced microstructured fibers for laser applications

G. Palma-Vega, C. Hupel, J. Nold, S. Kuhn, J. Limpert, N. Haarlammert, T. Schreiber

Proceedings Volume 11665, 116651S (2021) https://doi.org/10.1117/12.2577215

KEYWORDS: Manufacturing, Laser applications, Glasses, Cladding, Nanostructuring, Fiber lasers, Refractive index, Photonic crystal fibers, Optical simulations, Nanolithography

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Proceedings Article | 5 March 2021 Presentation

Presentation

Anti-Stokes fluorescence cooling of a Yb-doped silica glass preform using a high-power laser

Esmaeil Mobini, Saeid Rostami, Mostafa Peysokhan, Alexander Albrecht, Stefan Kuhn, Sigrun Hein, Christian Hupel, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Ramona Eberhardt, Angel Flores, Andreas Tünnermann, Mansoor Sheik-Bahae, Arash Mafi

Proceedings Volume 11702, 1170208 (2021) https://doi.org/10.1117/12.2579925

KEYWORDS: Silica, Glasses, Luminescence, High power lasers, Optical fibers, Optical amplifiers, High power fiber amplifiers, Absorption, High power fiber lasers, Fiber lasers

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Proceedings Article | 9 March 2020 Presentation

Presentation

Observation of anti-Stokes fluorescence cooling of ytterbium-doped silica glass (Conference Presentation)

Esmaeil Mobini, Saeid Rostami, Mostafa Peysokhan, Alexander Albrecht, Stefan Kuhn, Sigrun Hein, Christian Hupel, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Ramona Eberhardt, Andreas Tünnermann, Mansoor Sheik-Bahae, Arash Mafi

Proceedings Volume 11298, 112980G (2020) https://doi.org/10.1117/12.2545233

KEYWORDS: Luminescence, Silica, Glasses, Fiber amplifiers, Optical amplifiers, Fiber lasers, Laser damage threshold, High power lasers, High power fiber amplifiers, ZBLAN

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Proceedings Article | 21 February 2020 Presentation + Paper

Presentation + Paper

Analysis of fabrication techniques and material systems for kW fibers limited by TMI

Nicoletta Haarlammert, Stefan Kuhn, Christian Hupel, Johannes Nold, Steffen Schulze, Friedrich Möller, Victor Distler, Maximilian Strecker, Gonzalo Palma-Vega, Sigrun Hein, Denny Häßner, Till Walbaum, Thomas Schreiber, Ramona Eberhardt, Andreas Tünnermann

Proceedings Volume 11260, 1126026 (2020) https://doi.org/10.1117/12.2546714

KEYWORDS: High power fiber amplifiers, Single mode fibers, Cerium, Ytterbium, Optical fibers, Absorption, Doping, Fabrication, Fiber lasers, Aluminum, Refractive index, Signal attenuation, Amplifiers

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Proceedings Article | 27 February 2019 Paper

Paper

High-power fiber laser materials: influence of fabrication methods and codopants on optical properties

S. Kuhn, S. Hein, C. Hupel, J. Nold, F. Stutzki, N. Haarlammert, T. Schreiber, R. Eberhardt, A. Tünnermann

Proceedings Volume 10914, 1091405 (2019) https://doi.org/10.1117/12.2509609

KEYWORDS: Aluminum, Ytterbium, Doping, Signal attenuation, Refractive index, Fabrication, Absorption, Silica, High power fiber lasers, Optical properties

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Proceedings Article | 14 March 2018 Presentation

Presentation

TMI-threshold investigations of low NA Yb-doped single mode fibers (Conference Presentation)

Franz Beier, Friedrich Möller, Johannes Nold, Bettina Sattler, Stefan Kuhn, Christian Hupel, Sigrun Hein, Andreas Liem, Nicoletta Haarlammert, Thomas Schreiber, Ramona Eberhardt, Andreas Tünnermann

Proceedings Volume 10512, 1051203 (2018) https://doi.org/10.1117/12.2287699

KEYWORDS: Fiber amplifiers, Absorption, Single mode fibers, Thermal effects, Fiber lasers, Solid state lasers, Ytterbium, Manufacturing

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Proceedings Article | 22 February 2018 Paper

Paper

Active materials for high-power fiber lasers prepared by all-solution doping technique

Stefan Kuhn, Friedrich Möller, Christian Hupel, Sigrun Hein, Franz Beier, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Ramona Eberhardt, Andreas Tünnermann

Proceedings Volume 10528, 1052809 (2018) https://doi.org/10.1117/12.2287119

KEYWORDS: Ytterbium, Aluminum, Refractive index, Doping, Absorption, Boron, Luminescence, Signal attenuation, Phosphorus, High power fiber lasers

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Proceedings Article | 21 April 2017 Presentation

Presentation

Single mode low-NA step index Yb-doped fiber design for output powers beyond 4kW (Conference Presentation)

Franz Beier, Fritz Proske, Christian Hupel, Stefan Kuhn, Sigrun Hein, Bettina Sattler, Johannes Nold, Nicoletta Haarlammert, Thomas Schreiber, Ramona Eberhardt, Andreas Tünnermann

Proceedings Volume 10083, 100830Z (2017) https://doi.org/10.1117/12.2256038

KEYWORDS: Fiber amplifiers, Solid state lasers, Single mode fibers, Manufacturing, Fabrication, Doping, Step index fibers, High power fiber amplifiers, Amplifiers, Fiber lasers

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Proceedings Article | 12 May 2015 Paper

Paper

Investigation of Yb3+-doped alumino-silicate glasses for high energy class diode pumped solid state lasers

Jörg Körner, Joachim Hein, Mirko Tiegel, Stefan Kuhn, Joachim Buldt, Fangxin Yue, Reinhard Seifert, Andreas Herrmann, Christian Rüssel, Malte Kaluza

Proceedings Volume 9513, 95130S (2015) https://doi.org/10.1117/12.2182067

KEYWORDS: Glasses, Absorption, Luminescence, Quantum efficiency, Laser damage threshold, Semiconductor lasers, Diodes, Doping, Oscillators, Laser induced damage

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Showing 5 of 30 publications

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