Dr. Michael Jetter Profile

Dr. Michael Jetter

Groupleader Epitaxy at Univ Stuttgart

SPIE Involvement:

Conference Program Committee | Author | Editor

Area of Expertise:

Semiconductor Epitaxy , VCSEL , SESAMs , Quantum Dots , VECSEL , MECSEL

Websites:

Company Website

Publications (46)

Proceedings Article | 3 October 2024 Presentation

Heterogeneous integration of telecom c-band emitting quantum dots on silicon photonics platform by adhesive bonding

Ponraj Vijayan, Fiona Braun, Michael Hack, Micha Seidel, Stephanie Bauer, Simone Luca Portalupi, Michael Jetter, Peter Michler

Proceedings Volume PC13109, PC131090S (2024) https://doi.org/10.1117/12.3027061

KEYWORDS: Silicon photonics, Silicon, Adhesives, Quantum dots, Telecommunications, Integrated optics, Indium arsenide, Waveguides, Transparency, Refractive index

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Proceedings Article | 13 March 2024 Presentation

Exploration of diverse active regions for red to NIR VECSEL and MECSEL

Michael Jetter, Ana Cutuk, Rebecca Rühle, Philipp Noack, Peter Gierss, Peter Michler

Proceedings Volume PC12868, PC1286803 (2024) https://doi.org/10.1117/12.3001618

KEYWORDS: Vertical external cavity surface emitting lasers, Near infrared, Quantum wells, Fabrication, Epitaxy, Emission wavelengths, Design and modelling, Semiconductor materials, Semiconductor lasers, Quantum systems

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Proceedings Article | 13 March 2024 Presentation

Red-emitting MECSEL based on InP quantum dots

Ana Ćutuk, Michael Jetter, Peter Michler

Proceedings Volume PC12868, PC128680B (2024) https://doi.org/10.1117/12.3002549

KEYWORDS: Semiconductor quantum dots, Quantum dot emission, Laser bonding, Semiconductor lasers, Gallium arsenide, Fabrication, Aluminium gallium indium phosphide, Vertical external cavity surface emitting lasers, Thermal stability, Temperature metrology

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Proceedings Article | 13 March 2024 Presentation

Membrane quantum well waveguide lasers

Nicholas Klokkou, Stephen Richardson, Jake Daykin, J. R. Woods, J. Gorecki, Roman Bek, Michael Jetter, Vasilis Apostolopoulos

Proceedings Volume PC12868, PC128680E (2024) https://doi.org/10.1117/12.3004996

KEYWORDS: Waveguide lasers, Quantum wells, Waveguides, Waveguide modes, Silicon carbide, Semiconductors, Refractive index, Optical coherence, Laser optics, Design and modelling

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Proceedings Article | 13 March 2024 Presentation

Characterization of MOVPE grown InGaAs/GaAs semiconductor quantum dots as gain medium in edge emitting lasers

Philipp Noack, Nathalie Benzler, Sergej Vollmer, Michael Jetter, Peter Michler

Proceedings Volume PC12905, PC129050F (2024) https://doi.org/10.1117/12.3001593

KEYWORDS: Semiconductor lasers, Semiconductor quantum dots, Materials properties, Quantum confinement, Indium gallium arsenide, Gallium arsenide, Thermal stability, Solid state lasers, Solid state electronics, Quantum wells

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Proceedings Article | 13 March 2024 Presentation

Highly collimated Gaussian-beam emission of VCSEL in the red spectral range at raised output power operation

Lena Engel, Farnaz Khamseh, Arina Farsian, Michael Zimmer, Michael Jetter, Peter Michler

Proceedings Volume PC12904, PC1290406 (2024) https://doi.org/10.1117/12.3002535

KEYWORDS: Vertical cavity surface emitting lasers, Collimation, Mirror surfaces, Beam divergence, Oxides, Tolerancing, Printing, Power consumption, Polymers, Modulation

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Proceedings Article | 13 March 2024 Presentation

Design and characterization of AlGaInP-VECSELs with a grating waveguide structure

Ana Cutuk, Peter Gierss, Maxim Leyzner, Kai Currle, Uwe Brauch, Marwan Abdou Ahmed, Michael Jetter, Thomas Graf, Peter Michler

Proceedings Volume PC12897, PC128970Y (2024) https://doi.org/10.1117/12.3002741

KEYWORDS: Waveguides, Diffraction gratings, Design and modelling, Vertical external cavity surface emitting lasers, Optical gratings, Surface properties, Simulations, Semiconductors, Quantum wells, Output couplers

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Proceedings Article | 13 March 2024 Presentation + Paper

Compact, high performant prepare-and-measure photon source based on indistinguishable VCSELs

Erik Beckert, Michael Jetter, Jens Mueller, Matthias Hein, Christopher Spiess, Shadia Chowdhury, Peter Schreiber, Fanhui Zeng, Lena Engel, Michael Zimmer, Ana Cutuk, Shraddha Supreeti, Uwe Stehr, Heike Bartsch, Mahsa Kaltwasser, Marcus Babin

Proceedings Volume 12911, 129110W (2024) https://doi.org/10.1117/12.2691176

KEYWORDS: Vertical cavity surface emitting lasers, Waveguides, Microlens array, Collimation, Polarization, Quantum key distribution

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Proceedings Article | 13 March 2024 Presentation

Monolithic 850 nm VCSEL array for quantum key distribution via the BB84 and decoy state protocol

Michael Zimmer, Moritz Birkhold, Michael Jetter, Peter Michler

Proceedings Volume PC12904, PC1290402 (2024) https://doi.org/10.1117/12.3000679

KEYWORDS: Vertical cavity surface emitting lasers, Quantum key distribution, Quantum communication protocols, Photons, Quantum protocols, Polarization, Windows, Signal attenuation, Semiconductor lasers, Quantum security

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Proceedings Article | 12 March 2024 Presentation + Paper

Membrane external-cavity surface-emitting lasers (MECSELs) optimized for double-side-pumping: a first fundamental single-side pumping characterization

Telsche Mikitta, Ana Ćutuk, Michael Jetter, Peter Michler, Klaus Jöns, Hermann Kahle

Proceedings Volume 12868, 1286803 (2024) https://doi.org/10.1117/12.3002481

KEYWORDS: Quantum wells, Mirrors, Indium gallium phosphide, Vertical external cavity surface emitting lasers, Silicon carbide, Heatsinks, Emission wavelengths, Semiconductor lasers, Absorption

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Proceedings Article | 26 July 2023 Presentation

Telecom-wavelength quantum dots for photonic quantum technologies

Simone L. Portalupi, Cornelius Nawrath, Raphael Joos, Sascha Kolatschek, Stephanie Bauer, Florian Hornung, Ponraj Vijayan, Robert Sittig, Michael Jetter, Peter Michler

Proceedings Volume PC12633, PC126330Q (2023) https://doi.org/10.1117/12.2675840

KEYWORDS: Quantum technologies, Quantum dots, Photons, Quantum light generation, Quantum light, Telecommunications, Silica, Semiconductor quantum dots, Quantum science, Quantum experiments

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Proceedings Article | 20 March 2023 Presentation

Vertical and lateral carrier transport into InP quantum dots of a membrane external-cavity surface-emitting laser structure

Gordon Schmidt, Frank Bertram, Peter Veit, Julie Kernchen, Jürgen Christen, Ana Ćutuk, Michael Jetter, Peter Michler

Proceedings Volume PC12415, PC1241506 (2023) https://doi.org/10.1117/12.2649915

KEYWORDS: Quantum dots, Spectroscopy, Line scan image sensors, Cladding, Visualization, Spatial resolution, Scanning electron microscopy, Imaging spectroscopy, Epitaxy, Electron microscopes

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Proceedings Article | 17 March 2023 Presentation

Semiconductor quantum well membranes for tunable coherent waveguide laser arrays

Jake Daykin, Nicholas Klokkou, Stephen Richardson, Jonathan R. Woods, Roman Bek, Jon Gorecki, James Wilkinson, Michael Jetter, Peter Michler, Vasilis Apostolopoulos

Proceedings Volume 12404, 1240404 (2023) https://doi.org/10.1117/12.2655948

KEYWORDS: Waveguide lasers, Semiconductors, Quantum wells, Tunable lasers, Laser resonators, Waveguides, Silicon carbide, Semiconductor lasers, Space operations, Silicon photonics

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Proceedings Article | 17 March 2023 Presentation

Membrane external-cavity surface-emitting laser emitting in bi-frequency operation through micromachining of cavity mirror

Jake Daykin, Jonathan R. Woods, Daniel Heath, Roman Bek, James Wilkinson, Ben Mills, Michael Jetter, Peter Michler, Vasilis Apostolopoulos

Proceedings Volume 12404, 1240403 (2023) https://doi.org/10.1117/12.2647363

KEYWORDS: Mirrors, Micromachining, Terahertz spectroscopy, Laser ablation, Continuous wave operation, Spectroscopes, Reticles, Reflectivity, Optical sensing, Optical pumping

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Proceedings Article | 11 January 2023 Presentation

III-V compound semiconductor membrane quantum well waveguide lasers emitting at 1 μm

Stephen Richardson, Jonathan Woods, Jake Daykin, Jon Gorecki, Roman Bek, Nicholas Klokkou, James Wilkinson, Michael Jetter, Vasileios Apostolopoulos

Proceedings Volume PC12334, PC123340H (2023) https://doi.org/10.1117/12.2647572

KEYWORDS: Quantum wells, Waveguide lasers, Compound semiconductors, Waveguides, Silicon carbide, Laser development, Semiconductors, Semiconductor lasers, Resonators, Prototyping

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Proceedings Article | 30 May 2022 Poster

Fabrication and characterization of AlGaInP-based MECSELs with different cavity and gain crystal configurations

Ana Ćutuk, Matthias Seibold, David Ürek, Rebecca Rühle, Michael Jetter, Peter Michler

Proceedings Volume PC12141, PC121410V (2022) https://doi.org/10.1117/12.2632790

KEYWORDS: Crystals, Semiconductors, Mirrors, Semiconductor lasers, Etching, Dielectrics, Dielectric mirrors, Dielectric filters, Thermal effects, Semiconductor materials

Proceedings Article | 25 May 2022 Presentation

VCSELs in the visible red spectral range for display and sensor applications

Michael Jetter

Proceedings Volume PC12141, PC1214103 (2022) https://doi.org/10.1117/12.2624476

KEYWORDS: Vertical cavity surface emitting lasers, Visible radiation, Sensors, Medicine, Electro optics

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Proceedings Article | 25 May 2022 Presentation

Generation of ultrashort pulses by saturable absorbers with and without DBR in a red-emitting VECSEL

Ana Ćutuk, Marius Großmann, Michael Jetter, Peter Michler

Proceedings Volume PC12141, PC121410J (2022) https://doi.org/10.1117/12.2632378

KEYWORDS: Semiconductor lasers, Semiconductors, Ultrafast phenomena, Mode locking, Pulsed laser operation, Mirrors, Quantum wells, Etching, Disk lasers, Wavelength tuning

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Proceedings Article | 1 April 2022 Presentation

Progress of red-emitting mode-locked VECSELs

Marius Großmann, Ana Cutuk, Michael Jetter, Peter Michler

Proceedings Volume PC11984, PC1198405 (2022) https://doi.org/10.1117/12.2608436

KEYWORDS: Mode locking, Semiconductors, Aluminium gallium indium phosphide, Semiconductor lasers, Saturable absorption, Refractive index, Reflectivity, Quantum wells, Picosecond phenomena, Numerical modeling

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Proceedings Article | 9 March 2022 Presentation

Semiconductor in-plane membrane quantum-well lasers

Jonathan R. Woods, Jon Gorecki, Jake Daykin, Stephen Richardson, Michael Jetter, Roman Bek, Emelia Branagan-Harris, Grace Hooper, James Wilkinson, Anne Tropper, Vasilis Apostolopoulos

Proceedings Volume PC12021, PC1202105 (2022) https://doi.org/10.1117/12.2613328

KEYWORDS: Semiconductor lasers, Quantum wells, Semiconductors, Waveguides, Silicon photonics, Silicon carbide, Semiconducting wafers, Resonators, Planar waveguides, Optical simulations

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Proceedings Article | 13 March 2019 Paper

Development of electrically pumped VECSEL in the visible spectrum

Zhihua Huang, Michael Zimmer, Michael Jetter, Peter Michler

Proceedings Volume 10901, 109010U (2019) https://doi.org/10.1117/12.2509973

KEYWORDS: Etching, Electroluminescence, Doping, Aluminum, Structural design, Quantum wells, Gallium arsenide, Visible radiation, Finite element methods, Numerical simulations

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Proceedings Article | 4 March 2019 Paper

Investigations on the origins of self-mode-locking in vertical-external-cavity surface-emitting-lasers: nonlinear lensing and the role of the microcavity

Christian Kriso, Sascha Kress, Tasnim Munshi, Marius Großmann, Roman Bek, Michael Jetter, Peter Michler, Wolfgang Stolz, Martin Koch, Arash Rahimi-Iman

Proceedings Volume 10901, 109010H (2019) https://doi.org/10.1117/12.2510373

KEYWORDS: Mode locking, Refractive index, Optical microcavities, Nonlinear optics, Semiconductors, Ultrafast phenomena, Kerr effect, Absorption, Refraction

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Proceedings Article | 1 March 2019 Paper

InP/AlGaInP quantum dot laser emitting at short wavelength of 660 nm

Zhihua Huang, Michael Zimmer, Stefan Hepp, Michael Jetter, Peter Michler

Proceedings Volume 10939, 109390M (2019) https://doi.org/10.1117/12.2509508

KEYWORDS: Indium gallium phosphide, Aluminum, Temperature metrology, Electroluminescence, Absorption, Quantum dot lasers, Quantum dots, Epitaxy, Quantum efficiency, Quantum wells

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Proceedings Article | 23 May 2018 Presentation

MECSEL: new concept for optically pumped semiconductor disk lasers with versatile wavelength (Conference Presentation)

Michael Jetter, Roman Bek, Hermann Kahle, Peter Michler

Proceedings Volume 10682, 1068213 (2018) https://doi.org/10.1117/12.2306947

KEYWORDS: Semiconductor lasers, Semiconductors, Optical pumping, Disk lasers, Optical semiconductors, Optical filters, Laser systems engineering, Quantum wells, Frequency doubling crystals, Mirrors

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Semiconductor disk lasers, also called vertical external-cavity surface-emitting lasers (VECSELs) have advantageous properties such as high output power, wavelength flexibility due to bandgap engineering and near-diffraction limited beam quality. The possibility to insert intra-cavity elements – filters, frequency doubling crystals or semiconductor saturable absorber mirrors (SESAMs) – enables wavelength tuning, second harmonic generation or mode locking with ultra-short pulses. A major challenge for these laser sources is the removal of heat which is introduced by optical pumping. The thermal management can improved by placing only the active region directly between two heat spreaders. This membrane external-cavity surface-emitting laser (MECSEL) allows emission in an even larger wavelength range, since the growth is not restricted by a distributed Bragg reflector. We present the fabrication, processing and characterization of MECSELs using different material systems for laser emission at various wavelengths in the visible and in the infrared spectral range. Our semiconductor structures are grown by metal-organic vapor-phase epitaxy and contain quantum wells (QWs) or quantum dots (QDs) in the active regions. We discuss our latest results of the membrane laser concept with investigations of strain effects on the photoluminescence and the laser emission and different pumping schemes. In particular, we show results of a MECSEL placed into a linear cavity and pumped by a 532 nm laser. The system was operated at a heat sink temperature of 10°C and achieved nearly 600 mW at 3.7 W pump power. The slope efficiency achieved here was 22.3 % with a threshold pump power of 1 W. This slope efficiency exceeds any slope efficiency published before with green pumped conventional VECSEL in this emission range at these elevated heatsink temperatures. Including a birefringent filter into the laser cavity allows for a tuning of the emission laser wavelength. The group could demonstrate a tuning range of 24 nm (650 nm – 674 nm), which is the highest value achieved in this spectral range by semiconductor lasers to date. All these achievements come with the expected Gaussian TEM00 mode with a beam quality factor of M2< 1.06[Optica 3(12), 1506-1512 (2016)]. To demonstrate the flexibility and usability of the MECSEL approach, we have created an optically pumped laser with a GaInAsP membrane for emission around 1000 nm, together with a group in Dundee. The set-up of the laser was similar to that of the red spectral range but instead of diamond, SiC was used as heat spreader material. Nevertheless, the achieved output powers could exceed 10 W with a slope efficiency of 27.5% and this with the heat spreader on only one side. This work was as well recently published in Electronic Letters 2017 [DOI:10.1049/el.2017.2689]. Actually, we realized a running membrane laser at a wavelength of 608 nm, a wavelength not accessible so far. The characterization measurements are now ongoing, first results will be presented at the conference.

Proceedings Article | 4 May 2018 Paper

Single-photon and polarization-entangled photon emission from InAs quantum dots in the telecom C-band

Fabian Olbrich, Jonatan Höschele, Matthias Paul, Jan Kettler, Simone Portalupi, Michael Jetter, Peter Michler

Proceedings Volume 10672, 106720V (2018) https://doi.org/10.1117/12.2306765

KEYWORDS: Quantum dots, Indium arsenide, Photon polarization, Indium gallium arsenide, Polarization, Gallium arsenide, Telecommunications, Data communications, Computing systems

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Proceedings Article | 14 March 2018 Presentation

VECSEL and MECSEL: high power, wavelength versatility and ultra-short pulses (Conference Presentation)

Roman Bek, Hermann Kahle, Michael Jetter, Peter Michler

Proceedings Volume 10515, 105150B (2018) https://doi.org/10.1117/12.2291744

KEYWORDS: Semiconductor lasers, Semiconductors, Optical pumping, Mode locking, Pulsed laser operation, Aluminium gallium indium phosphide, Disk lasers, Optical filters, Frequency doubling crystals, Mirrors

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Proceedings Article | 21 April 2017 Presentation

Towards self-mode locking of AlGaInP-VECSELs (Conference Presentation)

Roman Bek, Quynh Duong-Ederer, Max Vaupel, Hermann Kahle, Thomas Schwarzbäck, Arash Rahimi-Iman, Michael Jetter, Martin Koch, Peter Michler

Proceedings Volume 10087, 100870N (2017) https://doi.org/10.1117/12.2252473

KEYWORDS: Indium gallium phosphide, Mode locking, Pulsed laser operation, Semiconductors, Semiconductor lasers, Kerr effect, Mirrors, Femtosecond phenomena, Laser systems engineering, Epitaxy

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Proceedings Article | 28 March 2017 Paper

Improved gain chip holder design for high efficient, high power AlGaInP-VECSEL

Philipp Tatar-Mathes, Hermann Kahle, Cherry M. Mateo, Uwe Brauch, Roman Bek, Michael Jetter, Thomas Graf, Peter Michler

Proceedings Volume 10087, 100870R (2017) https://doi.org/10.1117/12.2253670

KEYWORDS: Heatsinks, Semiconductors, Semiconductor lasers, Disk lasers, Continuous wave operation, Resonators, Distributed Bragg reflectors, Quantum wells, Wavelength tuning, Aluminium gallium indium phosphide, Quantum efficiency, Laser applications, Optical pumping, Free space, Optical components

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Proceedings Article | 27 February 2017 Presentation + Paper

The optically pumped semiconductor membrane external-cavity surface-emitting laser (MECSEL): a concept based on a diamond-sandwiched active region

Hermann Kahle, Cherry May Mateo, Uwe Brauch, Roman Bek, Michael Jetter, Thomas Graf, Peter Michler

Proceedings Volume 10087, 100870J (2017) https://doi.org/10.1117/12.2252182

KEYWORDS: Semiconductors, Semiconductor lasers, Disk lasers, Optical pumping, Heatsinks, Optical semiconductors, Diamond, Wavelength tuning, Solid state lasers, Biomedical optics, Thin film devices, Indium gallium phosphide, Absorption, Quantum wells, Photography, Laser resonators, Resonators, Mirrors

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Proceedings Article | 22 February 2017 Presentation + Paper

Schemes for efficient QW pumping of AlGaInP disk lasers

Uwe Brauch, Cherry May Mateo, Hermann Kahle, Roman Bek, Michael Jetter, Marwan Abdou Ahmed, Peter Michler, Thomas Graf

Proceedings Volume 10087, 1008703 (2017) https://doi.org/10.1117/12.2250901

KEYWORDS: Disk lasers, Diamond, Absorption, Quantum wells, Semiconductors, Semiconductor lasers, Mirrors, Prisms, Reflectivity, Photons

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Proceedings Article | 3 August 2016 Presentation

Low-noise quantum frequency down-conversion of indistinguishable photons (Conference Presentation)

Benjamin Kambs, Jan Kettler, Matthias Bock, Jonas Becker, Carsten Arend, Michael Jetter, Peter Michler, Christoph Becher

Proceedings Volume 9900, 990013 (2016) https://doi.org/10.1117/12.2225932

KEYWORDS: Photons, Single photon, Quantum dots, Quantum information, Quantum computing, Quantum communications, Beam splitters, Visibility, Teleportation, Light

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Single-photon sources based on quantum dots have been shown to exhibit almost ideal properties such as high brightness and purity in terms of clear anti-bunching as well as high two-photon interference visibilities of the emitted photons, making them promising candidates for different quantum information applications such as quantum computing, quantum communication and quantum teleportation. However, as most single-photon sources also quantum dots typically emit light at wavelengths of electronic transitions within the visible or the near infrared range. In order to establish quantum networks with remote building blocks, low-loss single photons at telecom wavelengths are preferable, though. Despite recent progress on emitters of telecom-photons, the most efficient single-photon sources still work at shorter wavelengths. On that matter, quantum frequency down-conversion, being a nonlinear optical process, has been used in recent years to alter the wavelength of single photons to the telecom wavelength range while conserving their nonclassical properties. Characteristics such as lifetime, first-order coherence, anti-bunching and entanglement have been shown to be conserved or even improved due to background suppression during the conversion process, while the conservation of indistinguishability was yet to be shown. Here we present our experimental results on quantum frequency down-conversion of single photons emitted by an InAs/GaAs quantum dot at 903.6 nm following a pulsed excitation of a p-shell exciton at 884 nm. The emitted fluorescence photons are mixed with a strong pump-field at 2155 nm inside a periodically poled lithium niobate ridge waveguide and converted to 1557 nm. Common issues of a large background due to Raman-scattered pump-light photons spectrally overlapping with the converted single photons could largely be avoided, as the pump-wavelength was chosen to be fairly longer than the target wavelength. Additional narrowband spectral filtering at the telecom regime as a result of the small conversion bandwidth and using a high-performance fiber-Bragg-grating solely left the detector dark counts as the only noise source in our setup. Therefore, we could achieve conversion efficiencies of more than 20 %. In order to test the indistinguishability, sequentially emitted photons were fed into a Mach-Zehnder interferometer and spatially as well as temporally overlapped at the output beam splitter. Cross-correlation measurements between both output-ports of the beam splitter exhibit two-photon interference contrasts of more than 40 % prior to and after the down-conversion step. Accordingly, we demonstrate that the process of quantum frequency conversion preserves photon indistinguishability and can be used to establish a versatile source of indistinguishable single photons at the telecom C-Band. Furthermore our scheme allows for converting photons in a wavelength band from 900 nm to 910 nm to the same telecom target wavelength. This enables us to test indistinguishability of frequency-converted photons, originally stemming from different sources with dinstinguishable wavelengths.

Proceedings Article | 10 March 2016 Paper

Gain chip design, power scaling and intra-cavity frequency doubling with LBO of optically pumped red-emitting AlGaInP-VECSELs

Hermann Kahle, Cherry M. Mateo, Uwe Brauch, Roman Bek, Thomas Schwarzbäck, Michael Jetter, Thomas Graf, Peter Michler

Proceedings Volume 9734, 97340T (2016) https://doi.org/10.1117/12.2209305

KEYWORDS: Second-harmonic generation, Quantum wells, Laser applications, Optical pumping, Absorption, Laser video displays, Laser resonators, Tunable lasers, Aluminium gallium indium phosphide, Quantum dots, Group III-V semiconductors, Semiconductor lasers, Thin film devices, Semiconductors, Heatsinks, Crystals, Ultraviolet radiation

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Proceedings Article | 10 March 2016 Paper

Efficiency and power scaling of in-well and multi-pass pumped AlGaInP VECSELs

Cherry M. Mateo, Uwe Brauch, Hermann Kahle, Roman Bek, Thomas Schwarzbäck, Michael Jetter, Marwan Abdou Ahmed, Peter Michler, Thomas Graf

Proceedings Volume 9734, 973410 (2016) https://doi.org/10.1117/12.2212162

KEYWORDS: Continuous wave operation, Ultraviolet radiation, Mid-IR, Laser sources, Aluminium gallium indium phosphide, Quantum efficiency, Temperature metrology, Numerical modeling, Absorption, Quantum wells, Mirrors, Reflectivity, Semiconductor lasers, Resonators, Heatsinks

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Proceedings Article | 4 March 2015 Paper

Quantum dot based mode-locked AlGaInP-VECSEL

Roman Bek, Grizelda Kersteen, Hermann Kahle, Thomas Schwarzbäck, Michael Jetter, Peter Michler

Proceedings Volume 9349, 93490G (2015) https://doi.org/10.1117/12.2077164

KEYWORDS: Silica, Mode locking, Picosecond phenomena, Quantum dots, Semiconductors, Mirrors, Pulsed laser operation, Modulation, Semiconductor lasers, Reflectivity

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Proceedings Article | 4 March 2015 Paper

Degradation studies and pump optimization of optically pumped red-emitting AlGaInP-VECSELs

Hermann Kahle, Cherry Mateo, Maren Jäger, Karoline Weinspach, Stefan Baumgärtner, Uwe Brauch, Roman Bek, Thomas Schwarzbäck, Michael Jetter, Thomas Graf, Peter Michler

Proceedings Volume 9349, 93490C (2015) https://doi.org/10.1117/12.2077559

KEYWORDS: Optical pumping, Quantum wells, Heatsinks, Mirrors, Semiconductor lasers, Laser applications, Semiconductors, Luminescence, Tunable lasers

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Proceedings Article | 3 March 2014 Paper

Femtosecond mode-locked red AlGaInP-VECSEL

Roman Bek, Nart Daghestani, Hermann Kahle, Thomas Schwarzbäck, Michael Jetter, Maria Ana Cataluna, Peter Michler

Proceedings Volume 8966, 89660P (2014) https://doi.org/10.1117/12.2037828

KEYWORDS: Quantum wells, Mode locking, Picosecond phenomena, Semiconductors, Femtosecond phenomena, Mirrors, Silica, Diamond, Modes of laser operation, Carrier dynamics

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Proceedings Article | 11 May 2012 Paper

Transverse mode and polarization characteristics of AlGaInP-based VCSELs with integrated multiple oxide apertures

Susanne Weidenfeld, Hendrik Niederbracht, Marcus Eichfelder, Michael Jetter, Peter Michler

Proceedings Volume 8432, 843205 (2012) https://doi.org/10.1117/12.922278

KEYWORDS: Oxides, Vertical cavity surface emitting lasers, Polarization, Capacitance, Resistance, Dielectric polarization, Crystals, Aluminum, Modulation, Oxidation

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Proceedings Article | 11 May 2012 Paper

Red AlGaInP-VECSEL emitting at around 665 nm: strain compensation and performance comparison of different epitaxial designs

Thomas Schwarzbäck, Hermann Kahle, Michael Jetter, Peter Michler

Proceedings Volume 8432, 843209 (2012) https://doi.org/10.1117/12.922593

KEYWORDS: Quantum wells, Absorption, Mirrors, Reflectivity, Cladding, Semiconductor lasers, Diamond, Heatsinks, Aluminium gallium indium phosphide, Copper

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Proceedings Article | 11 May 2012 Paper

Frequency doubled AlGaInP-VECSEL with high output power at 331 nm and a large wavelength tuning range in the UV

Thomas Schwarzbäck, Hermann Kahle, Michael Jetter, Peter Michler

Proceedings Volume 8432, 84320W (2012) https://doi.org/10.1117/12.922584

KEYWORDS: Ultraviolet radiation, Quantum wells, Optical filters, Second-harmonic generation, Diamond, Mirrors, Heatsinks, Wavelength tuning, Aluminium gallium indium phosphide, Cladding

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Proceedings Article | 15 February 2012 Paper

UV laser emission around 330 nm via intracavity frequency doubling of a tunable red AlGaInP-VECSEL

Hermann Kahle, Thomas Schwarzbäck, Marcus Eichfelder, Robert Roßbach, Michael Jetter, Peter Michler

Proceedings Volume 8242, 82420M (2012) https://doi.org/10.1117/12.907902

KEYWORDS: Quantum wells, Ultraviolet radiation, Reflectivity, Second-harmonic generation, Heatsinks, Tunable lasers, Optical filters, Mirrors, Laser applications, Absorption

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Proceedings Article | 22 February 2011 Paper

Wavelength tunable red AlGaInP-VECSEL emitting at around 660 nm

Thomas Schwarzbäck, Hermann Kahle, Marcus Eichfelder, Wolfgang-Michael Schulz, Robert Roßbach, Michael Jetter, Peter Michler

Proceedings Volume 7919, 79190B (2011) https://doi.org/10.1117/12.873558

KEYWORDS: Heatsinks, Reflectivity, Mirrors, Quantum wells, Absorption, Diamond, Second-harmonic generation, Ultraviolet radiation, Continuous wave operation, Optical filters

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Proceedings Article | 5 June 2010 Paper

DC and pulsed electrical excitation of single quantum dots

Matthias Reischle, Christian Kessler, Wolfgang-Michael Schulz, Marcus Eichfelder, Robert Roßbach, Michael Jetter, Peter Michler

Proceedings Volume 7727, 77270N (2010) https://doi.org/10.1117/12.853884

KEYWORDS: Electroluminescence, Avalanche photodetectors, Picosecond phenomena, Quantum dots, Light emitting diodes, Time correlated photon counting, Sensors, Excitons, Visible radiation, Silicon

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Proceedings Article | 16 February 2005 Paper

Red VCSEL for automotive applications

Robert Rossbach, Tabitha Ballmann, Rainer Butendeich, Ferdinand Scholz, Heinz Schweizer, Michael Jetter

Proceedings Volume 5663, (2005) https://doi.org/10.1117/12.597025

KEYWORDS: Vertical cavity surface emitting lasers, Aluminum, Modulation, Gallium, Temperature metrology, Reflectivity, Data modeling, Oxides, Aluminium gallium indium phosphide, Interfaces

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Proceedings Article | 20 December 2004 Paper

Red light VCSEL for high-temperature applications

Michael Jetter, Robert Rossbach, Rainer Butendeich, Ferdinand Scholz, Tabitha Ballmann, Heinz Schweizer

Proceedings Volume 5594, (2004) https://doi.org/10.1117/12.578279

KEYWORDS: Vertical cavity surface emitting lasers, Aluminum, Reflectivity, Mirrors, Gallium, Temperature metrology, Aluminium gallium indium phosphide, Oxides, Resistance, Oxidation

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Proceedings Article | 25 October 2004 Paper

Analysis of the modulation behavior of red VCSELs

Tabitha Ballmann, Robert Rossbach, Michael Jetter, Michael Jutzi, Manfred Berroth, Heinz Schweizer

Proceedings Volume 5597, (2004) https://doi.org/10.1117/12.580311

KEYWORDS: Vertical cavity surface emitting lasers, Modulation, Picosecond phenomena, Data communications, Quantum wells, Eye, Photodiodes, Laser damage threshold, Indium gallium phosphide, Phase only filters

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Proceedings Article | 8 December 2003 Paper

Red surface emitters: powerful and fast

Heinz Schweizer, Tabitha Ballmann, Rainer Butendeich, Robert Rossbach, Bernd Raabe, Michael Jetter, Ferdinand Scholz

Proceedings Volume 5248, (2003) https://doi.org/10.1117/12.512626

KEYWORDS: Vertical cavity surface emitting lasers, Modulation, Data communications, Laser applications, Gallium, Indium gallium phosphide, Temperature metrology, Oxides, Aluminum, Quantum wells

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Vertical cavity surface emitting lasers (VCSEL) in the GaInP/AlGaInP material system have experienced a rapid development in their short history. In general lasers from that material system are suitable for a huge number of applications beginning with TV lasers and high power lasers for edge emitters, continuing with optical data storage, medical applications as well as data communication in cars, air planes, offices and between computers as application field for VCSELs. Especially automotive applications show the highest requirements on a laser with respect to operation temperature and power. In this talk we draw out the problems of the material system AlGaInP and its implications for laser applications. We discuss the epitaxial and technological solutions to overcome at least a part of these inherent problems. We will discuss the possible power that we can expect from VCSELs emitting in the range between 650 nm to 670 nm. We got from our lasers 5 mW, CW @ RT, 670nm and 2.5mW, CW@RT, 650 nm. We emphasize the role of doping, Bragg mirror grading, suitable detuning of cavity mode and gain, and optimisation of the contact layer and control of the oxide aperture in the VCSEL structure to get improved operation characteristics at higher temperatures. From the analysis of high frequency measurements, we could evaluate modulation bandwidths between 4 GHz and 10 GHz. The application of polyimide as a dielectric isolation material shows the potential to obtain modulation bandwidths beyond 10 GHz. For the intrinsic modulation bandwidth we get a value of 25 GHz, which is near the value edge emitters show. A more detailed discussion on photon lifetimes and carrier transport times will be given in the talk. Red light emitting VCSELS driven with short current pulses showed laser emission up to + 160°C case temperature. Thus, a CW operation up to +120°C can be expected after further improvement of power generation (decrease of series resistance) and heat spreading (optimized contacts and mounting). From these characteristics we can conclude that AlGaInP-surface emitting lasers have a real potential as low cost lasers for automotive applications as we all as data communication applications up to 10 GHz.

Showing 5 of 46 publications

Proceedings Volume Editor (1)

SPIE Conference Volume | 17 May 2017

Vertical External Cavity Surface Emitting Lasers (VECSELs) VII

Conference Committee Involvement (10)

Vertical External Cavity Surface Emitting Lasers (VECSELs) XIV

28 January 2025 | San Francisco, California, United States

Vertical External Cavity Surface Emitting Lasers (VECSELs) XIII

31 January 2024 | San Francisco, California, United States

Vertical External Cavity Surface Emitting Lasers (VECSELs) XII

31 January 2023 | San Francisco, California, United States

Vertical External Cavity Surface Emitting Lasers (VECSELs) XI

25 January 2022 | San Francisco, California, United States

Vertical External Cavity Surface Emitting Lasers (VECSELs) X

4 February 2020 | San Francisco, California, United States

Showing 5 of 10 Conference Committees

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