Dr. Christian Vélez Profile

Dr. Christian Vélez

CEO at EXALOS AG

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Author

Publications (17)

Proceedings Article | 13 March 2024 Paper

Green multi-SLED source for high-resolution visible OCT

M. Duelk, N. Primerov, J. Rios, S. Gloor, C. Jobson, T. von Niederhäusern, M. Malinverni, A. Castiglia, M. Rossetti, C. Vélez

Proceedings Volume 12830, 1283004 (2024) https://doi.org/10.1117/12.3005651

KEYWORDS: Light sources, Relative intensity noise, Optical coherence tomography, Polarization, Visible radiation, Tissues

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Proceedings Article | 12 March 2024 Paper

Compact RGB module with blue, green LDs and red SLED and collinearly aligned collimated output beams

N. Primerov, C. Jobson, J. Rios, S. Gloor, N. Matuschek, T. von Niederhäusern, M. Rossetti, A. Castiglia, M. Malinverni, M. Duelk, C. Vélez

Proceedings Volume 12913, 129130P (2024) https://doi.org/10.1117/12.3001926

KEYWORDS: Collimation, RGB color model, Beam diameter, Light sources, Beam divergence, Optical alignment, Prisms, Emission wavelengths

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Proceedings Article | 12 March 2024 Paper

Red, green, and blue edge-emitting devices for beam scanning light engine architectures: from single emitters to arrays

M. Rossetti, A. Castiglia, M. Malinverni, A. Ferhatovic, D. Martin, M. Duelk, C. Vélez

Proceedings Volume 12913, 129130S (2024) https://doi.org/10.1117/12.3000076

KEYWORDS: Semiconductor lasers, Anodes, Coating, Semiconducting wafers, Aluminium gallium indium phosphide, Superluminescent diodes, Power consumption, Modulation, Indium gallium aluminum nitride

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Proceedings Article | 8 March 2024 Paper

The crucial role of InAlN for blue and green LDs and SLEDs with low power consumption

M. Malinverni, A. Castiglia, M. Rossetti, A. Ferhatovic, D. Martin, M. Duelk, C. Vélez

Proceedings Volume 12886, 128860A (2024) https://doi.org/10.1117/12.3000476

KEYWORDS: Cladding, Aluminum gallium nitride, Power consumption, Refractive index, Reflectivity, Gallium nitride, Doping, Design, Color, Waveguides

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Proceedings Article | 7 August 2023 Paper

Ultracompact RGB hybrid LD-SLED module based on micro-optics

N. Primerov, C. Jobson, J. Rios, S. Gloor, N. Matuschek, T. von Niederhäusern, M. Rossetti, A. Castiglia, M. Malinverni, M. Duelk, C. Vélez

Proceedings Volume 12624, 1262415 (2023) https://doi.org/10.1117/12.2675600

KEYWORDS: RGB color model, Beam diameter, Collimation, Beam divergence, Light sources, Optical alignment, Lenses, Emission wavelengths

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Proceedings Article | 20 June 2021 Presentation + Paper

Ultracompact RGB laser diode module for near-to-eye displays

N. Primerov, J. Ojeda, S. Gloor, N. Matuschek, M. Rossetti, A. Castiglia, M. Malinverni, M. Duelk, C. Velez

Proceedings Volume 11788, 117880Q (2021) https://doi.org/10.1117/12.2594243

KEYWORDS: RGB color model, Collimation, Semiconductor lasers, Optical filters, Free space optics, Dielectric filters, Windows, Temperature sensors, Pulsed laser operation, Projection systems

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Proceedings Article | 19 July 2019 Paper

840-nm combined-SLED source integrated in 14-pin butterfly module with 140-nm bandwidth

S. Gloor, J. Dahdah, N. Primerov, T. von Niederhäusern, M. Duelk, C. Velez

Proceedings Volume 11078, 110780W (2019) https://doi.org/10.1117/12.2527047

KEYWORDS: Optical coherence tomography, Light sources, Optics manufacturing, Spectral resolution, Image resolution, Dielectric filters, Superluminescent diodes, Collimation, Free space optics

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Proceedings Article | 21 June 2019 Presentation + Paper

A compact red-green-blue superluminescent diode module: A novel light source for AR microdisplays

N. Primerov, J. Dahdah, S. Gloor, T. von Niederhäusern, N. Matuschek, A. Castiglia, M. Malinverni, C. Mounir, M. Rossetti, M. Duelk, C. Vélez

Proceedings Volume 11062, 110620F (2019) https://doi.org/10.1117/12.2527626

KEYWORDS: RGB color model, Collimation, Light sources, Beam shaping, Augmented reality, Heads up displays, Dielectric filters, Beam propagation method, Light emitting diodes, Free space optics

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Proceedings Article | 23 February 2018 Paper

Recent progress on GaN-based superluminescent light-emitting diodes in the visible range

A. Castiglia, M. Rossetti, M. Malinverni, C. Mounir, N. Matuschek, M. Duelk, C. Vélez

Proceedings Volume 10532, 105321X (2018) https://doi.org/10.1117/12.2287763

KEYWORDS: Light emitting diodes, Waveguides, Quantum wells, Gallium nitride, Speckle, Doping, Cladding, Crystals, Indium gallium nitride, Continuous wave operation

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Proceedings Article | 21 November 2017 Open Access

Effects of gamma radiation on superluminescent light emitting diodes (SLEDs) for fibre optic gyroscope applications

L. Occhi, R. Rezzonico, C. Vélez, M. van Uffelen, F. Berghmans

Proceedings Volume 10567, 105672O (2017) https://doi.org/10.1117/12.2308088

KEYWORDS: Radiation effects, Gamma radiation, Light emitting diodes, Fiber optic gyroscopes

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Proceedings Article | 26 February 2016 Paper

GaN-based superluminescent diodes with long lifetime

A. Castiglia, M. Rossetti, N. Matuschek, R. Rezzonico, M. Duelk, C. Vélez, J-F. Carlin, N. Grandjean

Proceedings Volume 9748, 97481V (2016) https://doi.org/10.1117/12.2212699

KEYWORDS: Doping, Reliability, Gallium nitride, Magnesium, Superluminescent diodes, Semiconductor lasers, Light emitting diodes, Hydrogen, Waveguides, Diffusion

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Proceedings Article | 20 March 2013 Paper

High-speed miniaturized swept sources based on resonant MEMS mirrors and diffraction gratings

S. Gloor, A. Bachmann, M. Epitaux, T. von Niederhäusern, P. Vorreau, N. Matuschek, K. Hsu, M. Duelk, C. Vélez

Proceedings Volume 8571, 85712X (2013) https://doi.org/10.1117/12.2007106

KEYWORDS: Microelectromechanical systems, Optical coherence tomography, Mirrors, Diffraction gratings, Signal to noise ratio, Coherence (optics), Neodymium, Optical alignment, Laser resonators, Laser optics

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Proceedings Article | 16 February 2012 Paper

Superluminescent light emitting diodes: the best out of two worlds

M. Rossetti, J. Napierala, N. Matuschek, U. Achatz, M. Duelk, C. Vélez, A. Castiglia, N. Grandjean, J. Dorsaz, E. Feltin

Proceedings Volume 8252, 825208 (2012) https://doi.org/10.1117/12.912759

KEYWORDS: Light emitting diodes, Light sources, Gallium nitride, Waveguides, Semiconductor lasers, Visible radiation, Speckle, Temperature metrology, Superluminescent diodes

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Proceedings Article | 20 February 2009 Paper

Isolator-free 840-nm broadband SLEDs for high-resolution OCT

M. Duelk, V. Laino, P. Navaretti, R. Rezzonico, C. Armistead, C. Vélez

Proceedings Volume 7168, 716821 (2009) https://doi.org/10.1117/12.809078

KEYWORDS: Polarization, Optical coherence tomography, Optical isolators, Coherence (optics), Diodes, Interferometers, Tolerancing, Imaging systems, Silver, Ophthalmology

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Proceedings Article | 5 March 2008 Paper

Broadband superluminescent light-emitting device at 840 nm with high performance stability

Valerio Laino, Lorenzo Occhi, Paolo Navaretti, Christian Velez

Proceedings Volume 6847, 68472N (2008) https://doi.org/10.1117/12.763480

KEYWORDS: Optical coherence tomography, Light emitting diodes, Light sources, Quantum wells, Fiber optic gyroscopes, Fiber optics sensors, Coherence (optics), Optical components, Fiber optics, Sensors

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Proceedings Article | 13 April 2005 Paper

Quantum dot superluminescent diodes at 1300 nm

Christian Velez, Lorenzo Occhi, Marco Rossetti, Lianhe Li, Andrea Fiore

Proceedings Volume 5690, (2005) https://doi.org/10.1117/12.588716

KEYWORDS: Quantum dots, Superluminescent diodes, Optical coherence tomography, Gallium arsenide, Light sources, Indium arsenide, Semiconductors, Quantum wells, Photonics, Quantum electronics

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Proceedings Article | 30 November 2004 Paper

Quantum dot superluminescent diodes at 1300 nm

Christian Velez, Lorenzo Occhi, Marco Rossetti, Lian He Li, Andrea Fiore

Proceedings Volume 5618, (2004) https://doi.org/10.1117/12.578290

KEYWORDS: Quantum dots, Fiber optic gyroscopes, Fiber optics sensors, Gallium arsenide, Superluminescent diodes, Sensors, Indium arsenide, Light emitting diodes, Light sources, Quantum wells

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Showing 5 of 17 publications

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