Dr. Andreas Stoll Profile

Dr. Andreas Stoll

at Leibniz-Institut für Astrophysik Potsdam

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Author

Publications (9)

Proceedings Article | 18 July 2024 Presentation + Paper

Preliminary results of the Potsdam Arrayed Waveguide Spectrograph

Eloy Hernandez, Alan Günther, Stella Vješnica, Svend-Marian Bauer, Andreas Stoll, Hakan Önel, Kalaga Madhav, Martin Roth

Proceedings Volume 13096, 130960L (2024) https://doi.org/10.1117/12.3018014

KEYWORDS: Arrayed waveguide gratings, Sensors, Waveguides, Spectrographs, Cryostats, Near infrared spectroscopy, Astrophotonics, Frequency combs

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Arrayed waveguide gratings (AWG) have gained attention as promising integrated spectrographs for ground-based telescopes, airborne applications, and spaceborne instrumentation due to their low mass, diffraction limit characteristics, thermal stability, and robustness against vibrations and misalignment. The Potsdam Arrayed Waveguide Spectrograph (PAWS) is a cross-dispersive instrument based on an integrated photonic spectrograph (IPS) that is optimized for the astronomical H-Band and was designed and developed by innoFSPEC at the Leibniz Institute for Astrophysics Potsdam (AIP). The main element is a second-generation AWG that is fibre coupled and works as a first dispersive element. To work as an IPS, the dispersed light of the AWG is sampled at the output facet and magnified by a microscope objective. The light is then fed into a free-space optical system housed in a cryostat working at 140 K. An afocal relay re-images the exit pupil of the microscope into the plane of a cross-dispersive element containing a diffractive grating. Subsequently, an objective focuses the resulting echellogram on a Teledyne 2k × 2k H2RG near-infrared array working at 80 K. To validate the functionality of the system, different light sources have been used. A tunable laser source generated an echellogram through frame stacking. Furthermore, the cross-dispersed output of a supercontinuum source and of an in-house developed frequency comb system were recorded under varying input conditions of the AWG, successfully achieving first light laboratory measurements. Throughout multiple cycles and measurements of the instrument, several parameters and characteristics were identified, providing opportunities for optimization to enhance the instrument’s performance and facilitate the miniaturization of future iterations. In this manuscript, we will provide a concise overview of the PAWS instrument, the preliminary results of laboratory measurements, and lessons learned to improve the future iterations of the next generation near-infrared cross-dispersed integrated photonic spectrograph. PAWS represents a pioneering demonstration of an astronomy optimized AWG chip, showcasing the advantageous capabilities of integrated photonic spectrograph.

Proceedings Article | 17 March 2023 Presentation + Paper

Astrophotonics: photonic integrated circuits for astronomical instrumentation

Martin Roth, Kalaga Madhav, Andreas Stoll, Daniel Bodenmüller, Aline Dinkelaker, Aashia Rahman, Eloy Hernandez, Alan Günther, Stella Vjesnica

Proceedings Volume 12424, 124240B (2023) https://doi.org/10.1117/12.2655630

KEYWORDS: Arrayed waveguide gratings, Waveguides, Astronomy, Spectrographs, Photonic integrated circuits, Frequency combs, Telescopes, Spectral resolution, Design and modelling, Beam combiners

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Proceedings Article | 29 August 2022 Presentation + Paper

System integration of the Potsdam Arrayed Waveguide Spectrograph (PAWS)

Eloy Hernandez, Alan Günther, Svend-Marian Bauer, Christian Dani Guzmán, Christer Sandin, Andreas Stoll, Stella Vjesnica, Kalaga Madhav, Martin M. Roth

Proceedings Volume 12184, 121841O (2022) https://doi.org/10.1117/12.2627318

KEYWORDS: Sensors, Temperature metrology, Cryocoolers, Cryogenics, Bridges, Computer aided design, Molybdenum, Spectrographs, Mirrors, Electronics

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Proceedings Article | 13 December 2020 Poster + Presentation + Paper

Optomechanical design of PAWS, the Potsdam Arrayed Waveguide Spectrograph

Eloy Hernandez, Andreas Stoll, Svend-Marian Bauer, Amokrane Berdja, Rafael Bernardi, Dani Guzman, Alan Günther, Kalaga Madhav, Martin Roth, Christer Sandin, Constanza Villanueva

Proceedings Volume 11451, 114515O (2020) https://doi.org/10.1117/12.2562174

KEYWORDS: Waveguides, Spectrographs, Single mode fibers, Optical design, Telescopes, Calibration, Microscopes, Free space optics, Integrated photonics, Astronomy

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Proceedings Article | 3 January 2020 Paper

Integrated echélle gratings for astrophotonics

Andreas Stoll, Yu Wang, Kalaga Madhav, Martin Roth

Proceedings Volume 11203, 112030Z (2020) https://doi.org/10.1117/12.2541554

KEYWORDS: Spectral resolution, Astrophotonics, Waveguides, Diffraction gratings, Diffraction, Spectrographs, Optical design, Near infrared, Imaging spectroscopy, Spectroscopes

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Proceedings Article | 10 July 2018 Paper

High-performance integrated photonic spectrometers based on arrayed waveguide gratings in silica

Ziyang Zhang, Andreas Stoll, Kalaga Madhav, Julia Fiebrandt, Vadim Makan, Kirill Makan, Kai Sun, Dele Zhu, Martin Roth

Proceedings Volume 10706, 107063C (2018) https://doi.org/10.1117/12.2311856

KEYWORDS: Waveguides, Spectrometers, Astronomy, Silica, Integrated photonics, Spectral resolution, Spectrographs, Polarization, Wave propagation, Wavefronts

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Proceedings Article | 28 July 2014 Paper

Interferometers and spectrographs on silicon-platform for astrophysics: trends of astrophotonics

Harendra N. Fernando, Andreas Stoll, Nick Cvetojevic, René Eisemann, Nuwan Tharanga, Christopher Holmes, Michael Böhm, Martin Roth, Roger Haynes, Lars Zimmermann

Proceedings Volume 9151, 915148 (2014) https://doi.org/10.1117/12.2056500

KEYWORDS: Waveguides, Silicon, Birefringence, Interferometers, Spectrographs, Astronomy, Computer aided design, Spectral resolution, Photonics, Integrated photonics

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Proceedings Article | 13 September 2012 Paper

Planar integrated photonics spectrograph on silicon-nitride-on-insulator: densely integrated systems for astrophotonics and spectroscopy

Harendra N. Fernando, Andreas Stoll, René Eisermann, Jose Boggio, Lars Zimmermann, Roger Haynes, Martin Roth

Proceedings Volume 8450, 845046 (2012) https://doi.org/10.1117/12.925561

KEYWORDS: Waveguides, Silicon, Receivers, Integrated photonics, Computer aided design, Spectrographs, Spectroscopes, Spectral resolution, Astrophotonics, Beam propagation method

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Proceedings Article | 10 May 2012 Paper

Arrayed waveguide gratings beyond communication: utilization of entire image-plane of output star-coupler for spectroscopy and sensing

Harendra N. Fernando, Andreas Stoll, Jose Boggio, Roger Haynes, Martin Roth

Proceedings Volume 8431, 84311U (2012) https://doi.org/10.1117/12.923145

KEYWORDS: Waveguides, Receivers, Spectroscopy, Silicon, Imaging spectroscopy, Spectral resolution, Phased array optics, Spectroscopes, Refractive index, Beam propagation method

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Showing 5 of 9 publications

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