Dr. Heiko J. Unold Profile

Dr. Heiko J. Unold

at ETH Zürich

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Author

Publications (9)

Proceedings Article | 19 November 2007 Paper

Moving from ultrafast VECSELs to MIXSELs: a new class of ultrafast semiconductor lasers

T. Südmeyer, D. J. H. Maas, A.-R. Bellancourt, B. Rudin, M. Golling, H. Unold, U. Keller

Proceedings Volume 6782, 67820N (2007) https://doi.org/10.1117/12.754533

KEYWORDS: Semiconductor lasers, Ultrafast phenomena, Mode locking, Quantum wells, Semiconducting wafers, Semiconductors, Output couplers, Mirrors, Diode pumped solid state lasers, Laser applications

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Proceedings Article | 21 April 2006 Paper

Investigation of polarization properties of VCSELs subject to optical feedback from an extremely short external cavity

Mikel Arizaleta Arteaga, Heiko Unold, Johannes Ostermann, Rainer Michalzik, Manuel López-Amo, Hugo Thienpont, Krassimir Panajotov

Proceedings Volume 6185, 61850Z (2006) https://doi.org/10.1117/12.662081

KEYWORDS: Vertical cavity surface emitting lasers, Polarization, Bistability, Mirrors, Modulation, Switching, Refractive index, Reflectivity, Laser resonators, Thermal optics

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Proceedings Article | 8 September 2004 Paper

Optical feedback from extremely short external cavity in VCSEL

Mikel Arizaleta, Miren Camarena, Heiko Unold, Johannes Ostermann, Rainer Michalzik, Hugo Thienpont, Krassimir Panajotov

Proceedings Volume 5453, (2004) https://doi.org/10.1117/12.545071

KEYWORDS: Vertical cavity surface emitting lasers, Modulation, Polarization, Picosecond phenomena, Mirrors, Reflection, Reflectivity, Semiconductor lasers, Phase shift keying, Switches

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Proceedings Article | 17 June 2003 Paper

Polarization behavior and mode structure of vertical-cavity surface-emitting lasers with elliptical surface relief

Krassimir Panajotov, Miren Camarena, Maria-Cristina Moreno, Heiko Unold, Rainer Michalzik, Hugo Thienpont, Jan Danckaert, Irina Veretennicoff, Guy Verschaffelt

Proceedings Volume 4994, (2003) https://doi.org/10.1117/12.475729

KEYWORDS: Polarization, Vertical cavity surface emitting lasers, Crystals, Refractive index, Picosecond phenomena, Mirrors, Etching, Anisotropy, Lithium, Quantum wells

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Proceedings Article | 29 August 2002 Paper

Design and communication applications of short-wavelength VCSELs

Rainer Michalzik, Felix Mederer, Hendrik Roscher, Martin Stach, Heiko Unold, Dieter Wiedenmann, Roger King, Martin Grabherr, Erhard Kube

Proceedings Volume 4905, (2002) https://doi.org/10.1117/12.481017

KEYWORDS: Vertical cavity surface emitting lasers, Free space optics, Waveguides, Data transmission, Transmitters, Data communications, Modulation, Polymer multimode waveguides, Polymers, Receivers

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Proceedings Article | 4 June 2002 Paper

Single-mode VCSELs

Heiko Unold, Sawat Mahmoud, Roland Jaeger, Matthias Golling, Max Kicherer, Felix Mederer, Michael Riedl, T. Knoedl, Michael Miller, Rainer Michalzik, Karl Ebeling

Proceedings Volume 4649, (2002) https://doi.org/10.1117/12.469237

KEYWORDS: Vertical cavity surface emitting lasers, Etching, Polarization, Photonic crystals, Resistance, Switches, Modulation, Mirrors, Oxides, Reflectivity

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Proceedings Article | 1 May 2000 Paper

Large-area single-mode selectively oxidized VCSELs: approaches and experimental

Heiko Unold, Sawat Mahmoud, Franz Eberhard, Roland Jaeger, Max Kicherer, Felix Mederer, Michael Riedl, Karl Ebeling

Proceedings Volume 3946, (2000) https://doi.org/10.1117/12.384377

KEYWORDS: Vertical cavity surface emitting lasers, Resistance, Oxides, Mirrors, Refractive index, Etching, Data transmission, Diffraction, Fabry–Perot interferometers, Optical fibers

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Proceedings Article | 12 November 1999 Paper

Multigigabit/s perfluorinated graded-index plastic-optical-fiber data links with butt-coupled single-mode InGaAs VCSEL

Felix Mederer, Roland Jaeger, Peter Schnitzer, Heiko Unold, Max Kicherer, Karl Ebeling, Masaki Naritomi, Ryouta Yoshida

Proceedings Volume 3896, (1999) https://doi.org/10.1117/12.370320

KEYWORDS: Vertical cavity surface emitting lasers, Indium gallium arsenide, Data transmission, Optical fibers, Modulation, Signal attenuation, Refractive index, Glasses, Polymers, Polymer optical fibers

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Proceedings Article | 29 April 1999 Paper

64-channel flip-chip-mounted selectively oxidized GaAs VCSEL array for parallel optical interconnects

Christian Jung, Roger King, Roland Jaeger, Martin Grabherr, Franz Eberhard, Rudolf Roesch, Ulrich Martin, Dieter Wiedenmann, Heiko Unold, Rainer Michalzik, Karl Ebeling

Proceedings Volume 3627, (1999) https://doi.org/10.1117/12.347096

KEYWORDS: Vertical cavity surface emitting lasers, Silicon, Gallium arsenide, Packaging, Data transmission, Optical interconnects, Beam steering, Metals, Optical arrays, Free space optics

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Showing 5 of 9 publications

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