Mr. Mathias Richerzhagen Profile

Mathias Richerzhagen

at European Southern Observatory

SPIE Involvement:

Author

Publications (8)

SPIE Journal Paper | 4 January 2023

Construction and testing of a common mode choke for cryogenic detector pre-amplifiers

Mathias Richerzhagen, Joshua Hopgood

JATIS, Vol. 9, Issue 01, 010501, (January 2023) https://doi.org/10.1117/12.10.1117/1.JATIS.9.1.010501

KEYWORDS: Cryogenics, Magnetism, Nitrogen, Liquids, Equipment, Control systems, Tunable filters, Spectrographs, Resistance, Network security

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Proceedings Article | 30 August 2022 Poster + Paper

Final performance of the ESO’s ALICE and LISA wavefront sensing cameras

Enrico Marchetti, Paola Amico, Martin Brinkmann, Ralf Conzelmann, Diego Del Valle, Nicola Di Lieto, Max Engelhardt, Christoph Geimer, Josh Hopgood, Ignacio Molina, Eric Mueller, Jutta Quentin, Javier Reyes, Mathias Richerzhagen, Matthias Seidel, Joerg Stegmeier, Mirko Todorovic

Proceedings Volume 12185, 121857B (2022) https://doi.org/10.1117/12.2629931

KEYWORDS: Cameras, Sensors, Wavefront sensors, CCD image sensors, CMOS sensors

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Proceedings Article | 13 December 2020 Poster + Paper

Detector systems engineering for extremely large instruments

Elizabeth George, Naidu Bezawada, Derek Ives, Leander Mehrgan, Matteo Accardo, Domingo Alvarez, Martin Brinkmann, Ralf Conzelmann, Claudio Cumani, Mark Downing, Max Engelhardt, Marcus Haug, Joshua Hopgood, Christoph Geimer, Olaf Iwert, Barbara Klein, Christopher Mandla, Eric Müller, Suzanne Ramsay, Javier Reyes, Mathias Richerzhagen, Benoît Serra, Matthias Seidel, Jörg Stegmeier, Mirko Todorovic

Proceedings Volume 11454, 114541Y (2020) https://doi.org/10.1117/12.2562289

KEYWORDS: Sensors, Systems engineering, Detector development, Control systems, Electronics, Algorithm development, Charge-coupled devices, Mid-IR, Performance modeling, Systems modeling

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Proceedings Article | 13 December 2020 Poster

Update on the adaptive optics camera developments at ESO

Mark Downing, Enrico Marchetti, Matteo Accardo, Paola Amico, Martin Brinkmann, Ralf Conzelmann, Diego Del Valle, Nicola Di Lieto, Max Engelhardt, Christoph Geimer, Josh Hopgood, Leander Mehrgan, Ignacio Molina, Eric Mueller, Jutta Quentin, Javier Reyes, Mathias Richerzhagen, Matthias Seidel, Joerg Stegmeier, Mirko Todorovic

Proceedings Volume 11448, 114483E (2020) https://doi.org/10.1117/12.2560931

KEYWORDS: Cameras, Sensors, Adaptive optics, Nanoimprint lithography, Telescopes, Quantum efficiency, Wavefront sensors, Imaging systems, Large telescopes, Deformable mirrors

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Proceedings Article | 9 March 2020 Presentation + Paper

Alternative passive fiber coupling system based on multi-plane light conversion for satellite-to-ground communications

Ramon Mata Calvo, David Allioux, Andrew Reeves, Antonin Billaud, Juraj Poliak, Olivier Pinel, Helawae Friew Kelemu, Guillaume Labroille, Mathias Richerzhagen

Proceedings Volume 11272, 112720Q (2020) https://doi.org/10.1117/12.2546076

KEYWORDS: Adaptive optics, Scintillation, Single mode fibers, Satellites, Turbulence, Telecommunications, Fiber couplers, Satellite communications, Telescopes, Atmospheric turbulence

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Global coverage of internet access is essential for digitalization in society, becoming a disruptive technology in industry, education or political participation for example. Satellite communications is a complementary approach to the terrestrial fiber network, which can provide world-wide coverage with few satellites in geostationary orbit or with low-earth-orbit constellations. Optical wavelengths offer multiple THz of available spectrum that can be used to connect satellites to the ground network with high-throughput links, solving the radiofrequency bandwidth bottleneck, without regulations. Cloud covereage and atmospheric turbulence are the main challenge in guaranteeing the same availability as in terrestrial fiber-based systems. While the former can be addressed by site diversity, for the latter, other mitigation strategies are required. Adaptive optics is a common approach to correct for atmospheric phase distortions and ensure stable fiber coupling. However, this approach requires a relatively complex active setup and therefore a collaboration between DLR Institute of Communications and Navigation and Cailabs has been formed to investigate alternative passive solutions for low-complexity ground stations. Coupling into multimode fibers does not require adaptive optics due to the large fiber core, however the coupled signal is distributed into multiple fiber-modes and is therefore incompatible with standard telecommunications components. Cailabs Multi-Plane Light Conversion (MPLC) technology overcomes this issue, selectively demultiplexing the fibermodes into single-mode fibers. Here, DLR’s adaptive optics system and the MPLC technology in a turbulence-relevant environment for GEO communications are compared, investigating the advantages of the MPLC approach for compensating strong turbulence. This paper presents an overview of the measurement setup and analyzes the single-mode fibers outputs of the spatial demultiplexer and the measured phase-distortions from a wavefront sensor.

Proceedings Article | 12 July 2019 Open Access

Adaptive optics pre-correction for optical feeder links: breadboard performance

Rudolf Saathof, Remco den Breeje, Wimar Klop, Niek Doelman, Thijs Moens, Michael Gruber, Tjeerd Russchenberg, Federico Pettazzi, Jet Human, Ramon Mata Calvo, Juraj Poliak, Ricardo Barrios, Mathias Richerzhagen, Ivan Ferrario

Proceedings Volume 11180, 111802D (2019) https://doi.org/10.1117/12.2536004

KEYWORDS: Adaptive optics, Wavefronts, Turbulence, Scintillation, Atmospheric turbulence, Wavefront sensors, Sensors, Satellite communications, Free space optics, Point spread functions

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Proceedings Article | 25 March 2019 Paper

Pre-correction adaptive optics performance for a 10 km laser link

Proceedings Volume 10910, 109101H (2019) https://doi.org/10.1117/12.2506849

KEYWORDS: Adaptive optics, Scintillation, Free space optics, Atmospheric turbulence, Turbulence, Sensors, Free space optical communications, Satellite communications, Radio optics, Wavefronts

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Proceedings Article | 4 March 2019 Paper

Optical technologies for very high throughput satellite communications

Ramon Mata Calvo, Juraj Poliak, Janis Surof, Andrew Reeves, Mathias Richerzhagen, Helawae Friew Kelemu, Ricardo Barrios, Carlos Carrizo, Raphael Wolf, Fabian Rein, Annika Dochhan, Karen Saucke, Wolfram Luetke

Proceedings Volume 10910, 109100W (2019) https://doi.org/10.1117/12.2513819

KEYWORDS: Satellites, Adaptive optics, Satellite communications, Telecommunications, Scintillation, Optical communications, Receivers, Turbulence, Modulation, Atmospheric optics, Optical networks, Laser guide stars, Homodyne detection, Digital signal processing

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Showing 5 of 8 publications

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