Dr. Andreas Wienke Profile

Dr. Andreas Wienke

Head of Optical Components Department at Laser Zentrum Hannover eV

SPIE Involvement:

Conference Program Committee | Author

Publications (21)

Proceedings Article | 24 November 2023 Poster

Correlation of coating stress and LIDT

Tarik Kellermann, Heinrich Mädebach, Morten Steinecke, Marco Jupé, Andreas Wienke, Detlev Ristau

Proceedings Volume PC12726, PC127260Z (2023) https://doi.org/10.1117/12.2685288

KEYWORDS: Laser damage threshold, Coating stress, Coating, Optical surfaces, Manufacturing, Deformation, Vacuum chambers, Optics manufacturing, Optical components, Ions

Read Abstract +

Proceedings Article | 24 November 2023 Poster

Optical components applying quantized nanolaminates for NIR applications

Marco Jupé, Cassian Bergmann, Morten Steinecke, Andreas Wienke

Proceedings Volume PC12726, PC127261H (2023) https://doi.org/10.1117/12.2685259

KEYWORDS: Refractive index, Near infrared, Optical components, Quantum wells, Tunable filters, Titanium dioxide, Thin films, Sputter deposition, Silica, Semiconductors

Read Abstract +

Proceedings Article | 24 November 2023 Poster

Temperature and damage behavior of hybrid coated mirrors under continuous wave laser irradiation

Kevin Kiedrowski, Morten Steinecke, Henrik Ehlers, Michael Kennedy, Marco Jupé, Andreas Wienke, Detlev Ristau

Proceedings Volume PC12726, PC1272619 (2023) https://doi.org/10.1117/12.2685163

KEYWORDS: Mirrors, Oxides, Laser irradiation, Continuous wave operation, Laser scanners, Tantalum, Niobium, Multilayers, Metals, Manufacturing

Read Abstract +

Proceedings Article | 24 November 2023 Presentation + Paper

Determining the bandgap dependence of nonlinear absorption and laser induced damage threshold through numerical simulation and experiment

Joshua McCauley, Xiaochuan Ji, Marco Jupé, Jinlong Zhang, Andreas Wienke, Detlev Ristau

Proceedings Volume 12726, 127260J (2023) https://doi.org/10.1117/12.2685160

KEYWORDS: Laser damage threshold, Absorption, Light absorption, Numerical simulations, Nonlinear optics, Thin films, Photons, Ultrafast phenomena, Statistical analysis, Particles

Read Abstract +

Proceedings Article | 24 November 2023 Presentation + Paper

Bandgap energy of quantizing nanolaminates and its relation to the laser-induced damage threshold in the ultraviolet

S. Paschel, M. Steinecke, T. Kellermann, K. Kiedrowski, A. Melninkaitis, M. Jupé, A. Wienke, D. Ristau

Proceedings Volume 12726, 127260E (2023) https://doi.org/10.1117/12.2685250

KEYWORDS: Laser damage threshold, Ultraviolet radiation, Refractive index, Quantum metamaterials, Ultrafast phenomena, Quantum wells, Quantum features, Quantum correlations, Optical design, Optical components

Read Abstract +

Proceedings Article | 2 October 2023 Poster + Paper

Spectrally aligned integration of miniaturized substrate-free thin-film filters for fiber optical networks

Philipp Gehrke, Anna Rüsseler, Gerd Hoffmann, Andreas Wienke, Dietmar Kracht, Detlev Ristau

Proceedings Volume 12666, 126660M (2023) https://doi.org/10.1117/12.2676681

KEYWORDS: Tunable filters, Optical filters, Semiconducting wafers, Coating, Design and modelling, Miniaturization, Thin films, Optical alignment, Wafer-level optics, Optics manufacturing

Read Abstract +

Proceedings Article | 3 December 2022 Presentation

Environmental dependencies on the LIDT of all-silica GLAD mirrors for 355 nm

Sebastian Paschel, Morten Steinecke, Florian Carstens, Marco Jupé, Andreas Wienke, Detlev Ristau, Tomas Tolenis, Lukas Ramalis

Proceedings Volume PC12300, PC123000L (2022) https://doi.org/10.1117/12.2642745

KEYWORDS: Mirrors, Temperature metrology, Optics manufacturing, Absorption, Spectrophotometry, Silica, Resistance, Optical simulations, Optical components, Laser induced damage

Read Abstract +

Proceedings Article | 3 December 2022 Poster + Presentation

Correlation of the damage behavior of high power continuous wave laser hybrid mirrors with total losses

Kevin Kiedrowski, Marco Jupé, Michael Kennedy, Henrik Ehlers, Andreas Wienke, Detlev Ristau

Proceedings Volume PC12300, PC123000D (2022) https://doi.org/10.1117/12.2642757

KEYWORDS: Mirrors, Continuous wave operation, High power lasers, Light scattering, Spectroscopes, Scattering, Reflectivity, Polarization, Manufacturing, Laser scanners

Read Abstract +

Proceedings Article | 2 December 2022 Presentation + Paper

Nonlinear optical switching in thin film coatings in relation to the damage threshold

Morten Steinecke, Kevin Kiedrowski, Marco Jupé, Andreas Wienke, Detlev Ristau

Proceedings Volume 12300, 123000F (2022) https://doi.org/10.1117/12.2642756

KEYWORDS: Optical coatings, Switching, Transmittance, Thin film coatings, Refractive index, Reflectivity, Kerr effect, Pulsed laser operation, Optical switching, Mirrors

Read Abstract +

Proceedings Article | 30 May 2022 Presentation

Switching of ultrashort laser pulses by nonlinear optics in thin films

Morten Steinecke, Marco Jupé, Andreas Wienke, Detlev Ristau

Proceedings Volume PC12143, PC121430Z (2022) https://doi.org/10.1117/12.2622118

KEYWORDS: Switching, Ultrafast phenomena, Thin films, Nonlinear optics, Optical switching, Interference filters, Switches, Refractive index, Reflectivity, Photonics systems

Read Abstract +

Proceedings Article | 25 May 2022 Presentation + Paper

High power laser-induced damage investigations of mirrors with several substrate materials in combination with heat transfer simulations

K. Kiedrowski, M. Jupé, M. Kennedy, H. Ehlers, A. Wienke, D. Ristau

Proceedings Volume 12142, 121420F (2022) https://doi.org/10.1117/12.2621132

KEYWORDS: Mirrors, Silica, Silicon carbide, Laser induced damage, Sapphire, Laser damage threshold

Read Abstract +

Nowadays, continuous wave (cw) lasers have conquered a broad spectrum of applications in industrial laser processing and can be considered as the dominant tools in many manufacturing floors. This is reflected by the enormous average annual growth rates of 25-30 % and the continuous research efforts dedicated to this laser type leading to ever increasing output power and beam quality. This development imposes ever increasing demands on the quality of the optical laser components, that have to withstand the usually harsh industrial environment and high power levels. In fact, the corresponding of the laser components is a key factor for the efficiency and economic success of an employed laser material process. This in turn requires a thorough assessment of the quality parameters ruling the stability of such components. Among many other quality parameters, the Laser Induced Damage Threshold (LIDT) is one of the leading parameters that has to be investigated in detail. The corresponding measurement facilities and protocols as well as the evaluation of the data have to be performed with high reproducibility and comparability among different testing laboratories. As a consequence, such qualifications can only be achieved on the basis of well-defined international standards defining the complete procedure for the determination of LIDT values. We investigated the laser induced damage threshold of different types of optics using a cw laser with a wavelength of 1030 nm and power up to 6 kW, applying beam diameters of approximately 200-300 µm on the surface. The samples were irradiated for at least 30s or until damage occurred. First, it was necessary to review the existing DIN EN ISO 21254 regarding cw-irradiation of mirrors with a 25 mm diameter. An important aspect is the number of possible irradiation spots on each optic with respect to the damage size as well as the emitted debris. Both effects limit the statistical accuracy, the ISO procedure needs to be adapted to the measurement conditions. Additionally, we investigated the influence of substrate materials and coating processes on the LIDT of high reflective coatings and their damage behavior, especially regarding their thermal conductivity. The results were then compared with simulations concerning the maximum temperature within the optical component.

Proceedings Article | 5 March 2022 Presentation + Paper

Study of rotary atomic layer deposition for optical applications

Leif Kochanneck, Andreas Tewes, Gerd-Albert Hoffmann, Kalle Niiranen, John Rönn, Hector Velasco, Sami Sneck, Andreas Wienke, Detlev Ristau

Proceedings Volume 12002, 120020D (2022) https://doi.org/10.1117/12.2612173

KEYWORDS: Atomic layer deposition, Coating, Absorption, Tantalum, Quartz, Refractive index, Plasma, Optical coatings

Read Abstract +

Proceedings Article | 4 March 2022 Presentation

Power scaling in Thulium-doped fiber Mamyshev oscillators

Benedikt Schuhbauer, Veronika Adolfs, Andreas Wienke, Jörg Neumann, Dietmar Kracht

Proceedings Volume PC11981, PC119810Q (2022) https://doi.org/10.1117/12.2608896

KEYWORDS: Oscillators, Ultrafast phenomena, Thulium, Solitons, Picosecond phenomena, Optical filters, Mode locking

Read Abstract +

Proceedings Article | 5 March 2021 Poster + Presentation + Paper

Quasi-monolithic laser system based on 3D-printed optomechanics

Fabian Kranert, Jana Budde, Moritz Hinkelmann, Andreas Wienke, Jörg Neumann, Dietmar Kracht, Roland Lachmayer

Proceedings Volume 11667, 116670L (2021) https://doi.org/10.1117/12.2577457

KEYWORDS: Laser systems engineering, Optomechanical design, Additive manufacturing, Polymers, Solid state lasers, Sensor technology, Semiconductor lasers, Optomechanical components, Optical components, Lenses

Read Abstract +

Proceedings Article | 5 March 2021 Presentation

Dispersion-managed thulium-doped fiber Mamyshev oscillator

Paul Repgen, Benedikt Schuhbauer, Moritz Hinkelmann, Dieter Wandt, Andreas Wienke, Uwe Morgner, Jörg Neumann, Dietmar Kracht

Proceedings Volume 11665, 116650C (2021) https://doi.org/10.1117/12.2578470

KEYWORDS: Oscillators, Picosecond phenomena, Optical filters, Modulation, Mode locking, Bandpass filters

Read Abstract +

Proceedings Article | 5 March 2021 Presentation

Yb-doped fiber Mamyshev oscillator with a few-mode gain fiber

Paul Repgen, Dieter Wandt, Andreas Wienke, Uwe Morgner, Jörg Neumann, Dietmar Kracht

Proceedings Volume 11665, 1166516 (2021) https://doi.org/10.1117/12.2578456

KEYWORDS: Oscillators, Molybdenum, Mode locking, Tolerancing, Step index fibers, Resonators, Photonic crystal fibers, Phase shift keying, Optical filters

Read Abstract +

Proceedings Article | 30 March 2020 Presentation + Paper

Generation of functional curved waveguides by CO2-laser based deposition of coreless fused silica fibers

Fabian Kranert, Katharina Rettschlag, Andreas Wienke, Arndt Hohnholz, Jörg Neumann, Peter Jäschke, Dietmar Kracht, Roland Lachmayer

Proceedings Volume 11349, 1134909 (2020) https://doi.org/10.1117/12.2554516

KEYWORDS: Waveguides, Glasses, Optical fibers, Deposition processes, Structured optical fibers, Optics manufacturing, Laser processing

Read Abstract +

Proceedings Article | 2 March 2020 Presentation + Paper

Opto-thermal simulation framework for the investigation of phosphor materials in laser-based lighting systems

Elisavet Chatzizyrli, Andreas Wienke, Roland Lachmayer, Jörg Neumann, Dietmar Kracht

Proceedings Volume 11274, 112741E (2020) https://doi.org/10.1117/12.2546052

KEYWORDS: Ceramics, Scattering, Light sources and illumination, Thermography, Light scattering, Optical simulations, Light emitting diodes, Crystals, Quenching (fluorescence), Laser scattering

Read Abstract +

Proceedings Article | 21 February 2020 Presentation + Paper

3D-printed, low-cost, lightweight optomechanics for a compact, low-power solid-state amplifier system

Fabian Kranert, Jana Budde, Philipp Neef, Robert Bernhard, Marius Lammers, Katharina Rettschlag, Tobias Grabe, Andreas Wienke, Jörg Neumann, Henning Wiche, Volker Wesling, Henning Ahlers, Roland Lachmayer, Dietmar Kracht

Proceedings Volume 11261, 1126105 (2020) https://doi.org/10.1117/12.2544268

KEYWORDS: Optical amplifiers, Printing, Optomechanical design, Laser systems engineering, Polymers, Additive manufacturing

Read Abstract +

Proceedings Article | 23 May 2018 Presentation

High energy, femtosecond fiber laser source at 1750 nm for 3-photon microscopy (Conference Presentation)

Andreas Wienke, Dieter Wandt, Jean-Bernard Lecourt, Didier Lekime, Yves Hernandez, Jörg Neumann, Dietmar Kracht

Proceedings Volume 10683, 106831T (2018) https://doi.org/10.1117/12.2307467

KEYWORDS: Microscopy, Femtosecond fiber lasers, Phase modulation, Fiber amplifiers, Wavelength division multiplexing, Fiber lasers, Imaging systems, Laser systems engineering, Polarization, Oscillators

Read Abstract +

We present an ultrafast fiber laser system at a central wavelength of 1750 nm for imaging applications, in particular 3-photon microscopy. It generates an output pulse train with an adjustable repetition rate ranging from 1 MHz to 21 MHz. After temporal compression the pulse duration is 220 fs and the maximum achieved pulse energy is 20 nJ. The laser system consists of a polarization maintaining (PM) Erbium-doped fiber oscillator which emits a stable output pulse train at a fixed repetition rate of 42 MHz. The oscillator generates soliton pulses centered at a wavelength of 1560 nm and a spectral width of 7 nm. Mode-locking is initiated and stabilized by a semiconductor saturable absorber mirror. The output pulses are picked in a PM fiber coupled acousto-optic modulator to an adjustable repetition rate of 1 – 21 MHz. A consecutive Erbium-doped PM fiber amplifier (EDFA) boosts the energy of the soliton pulses from pJ to nJ level. The directly emitted pulses have a duration of 2 ps which can be compressed to a pulse duration of 115 fs by using a passive standard fiber. The uncompressed pulses are soliton-self-frequency shifted by Raman scattering to wavelengths longer than 1700 nm in 7 m of passive PM1550 fiber at a pulse energy of 1.1 nJ. The central wavelength can be adjusted by the pump power of the EDFA. To boost the pulse energy of the wavelength shifted pulses, the Raman stage is followed by a single-clad Thulium-doped fiber (TDF) amplifier. It consists of a 1560/1750 nm wavelength division multiplexer (WDM) and 0.9 m of TDF. To diminish nonlinear effects during amplification, the pulses are stretched with 25 m of normal dispersion fiber (NDF) inserted between the WDM and the TDF. Although on the very short wavelength amplification band, the pulses are amplified up to more than 40 nJ of pulse energy at an injected pump power of 4.1 W. After the fiber amplifier, the pulses are coupled out and propagate through a spectral filter, a triplet of l/4, l/2, and l/4 waveplates, an isolator, and a grating compressor. As the WDM, NDF, and TDF are not PM, the polarization state has to be readjusted to linear with the waveplates before entering the isolator. The added group delay dispersion of 2.17 ps2 by the NDF is compensated in a free space standard grating compressor built of two 600 lines/mm gratings. The transmission of the grating compressor is 60 %. To achieve optimum compression to a pulse duration of 220 fs at a pulse energy of 20 nJ, the compressor in combination with spectral filtering around 1750 nm has to be carefully adjusted. The maximum output pulse energy of 20 nJ is constant ranging from 1 MHz to 7 MHz, but is reduced at higher repetition rates down to 8.7 nJ. The output pulse duration is nearly constant at 220 fs for all repetition rates. Further amplification of the pulses is currently under investigation. This system will be used in future for the application of 3-photon microscopy.

Proceedings Article | 4 March 2015 Paper

Sub-700fs pulses at 152 W average power from a Tm-doped fiber CPA system

Christian Gaida, Fabian Stutzki, Martin Gebhardt, Florian Jansen, Andreas Wienke, Uwe Zeitner, Frank Fuchs, Cesar Jauregui, Dieter Wandt, Dietmar Kracht, Jens Limpert, Andreas Tünnermann

Proceedings Volume 9344, 93441K (2015) https://doi.org/10.1117/12.2079056

KEYWORDS: Fiber lasers, Fiber amplifiers, Oscillators, Ultrafast phenomena, Laser systems engineering, Optical amplifiers, Medium wave, Thermal effects, Dielectric polarization, Diffraction

Read Abstract +

Showing 5 of 21 publications

Conference Committee Involvement (1)

Advances in Optical Thin Films VIII

8 April 2024 | Strasbourg, France

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years