Dr. Andreas Bülter Profile

Dr. Andreas Bülter

Sales Engineer at PicoQuant GmbH

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Author

Publications (8)

Proceedings Article | 30 May 2022 Presentation + Paper

Ultra-fast single-photon counting with waveguide-integrated detectors for quantum technologies

Fabian Beutel, Matthias Häußler, Robin Terhaar, Martin Wolff, Wladick Hartmann, Nicolai Walter, Max Tillmann, Michael Wahl, Tino Röhlicke, Mahdi Ahangarianabhari, Andreas Bülter, Doreen Wernicke, Nicolas Perlot, Jasper Rödiger, Carsten Schuck, Wolfram H. Pernice

Proceedings Volume 12089, 1208907 (2022) https://doi.org/10.1117/12.2620329

KEYWORDS: Sensors, Quantum key distribution, Single photon detectors, Waveguides, Quantum communications, Photonics, Picosecond phenomena, Nanowires, Ultrafast phenomena, Superconductors

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Proceedings Article | 7 March 2022 Poster

High bandwidth photon detection enabled by a massively parallelized system

Andreas Bülter, Max Tillmann, Michael Wahl, Tino Röhlicke, Doreen Wernicke, Martin Wolff, Matthias Häussler, Nicolai Walter, Robin Stegmüller, Fabian Beutel, Wolfram Pernice, Carsten Schuck, Jasper Rödiger, Torsten Langer, Mario Gerecke, Uwe Ortmann

Proceedings Volume PC12015, PC1201517 (2022) https://doi.org/10.1117/12.2608713

KEYWORDS: Photodetectors, Sensors, Photonics systems, Data processing, Chemical elements, Temporal resolution, Superconductors, Single photon detectors, Single photon, Quantum information

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Proceedings Article | 5 March 2022 Presentation + Paper

Multi-channel waveguide-integrated superconducting nanowire single-photon detector system for ultrafast quantum key distribution

Robin Terhaar, Matthias Häußler, Helge Gehring, Martin Wolff, Fabian Beutel, Nicolai Walter, Wladick Hartmann, Max Tillmann, Michael Wahl, Tino Röhlicke, Andreas Bülter, Doreen Wernicke, Nicolas Perlot, Jasper Rödiger, Carsten Schuck, Wolfram Pernice

Proceedings Volume 12009, 120090K (2022) https://doi.org/10.1117/12.2609887

KEYWORDS: Quantum key distribution, Single photon detectors, Sensors, Nanowires, Waveguides, Superconductors, Single photon, Signal detection

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Proceedings Article | 14 May 2011 Paper

Tau-SPAD: a new red sensitive single-photon counting module

Gerald Kell, Andreas Bülter, Michael Wahl, Rainer Erdmann

Proceedings Volume 8033, 803303 (2011) https://doi.org/10.1117/12.884754

KEYWORDS: Sensors, Single photon, Picosecond phenomena, Electronics, Photodetectors, Avalanche photodiodes, Molecules, Fluorescence correlation spectroscopy, Photon counting, Quenching (fluorescence)

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Proceedings Article | 15 February 2008 Paper

Advanced FRET and FCS measurements with laser scanning microscopes based on time-resolved techniques

B. Krämer, V. Buschmann, U. Ortmann, F. Koberling, M. Wahl, M. Patting, P. Kapusta, A. Bülter, R. Erdmann

Proceedings Volume 6860, 68601D (2008) https://doi.org/10.1117/12.761141

KEYWORDS: Sensors, Luminescence, Fluorescence correlation spectroscopy, Fluorescence resonance energy transfer, Pulsed laser operation, Laser scanners, Microscopes, Single photon, Data acquisition, Fluorescence lifetime imaging

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Proceedings Article | 15 February 2008 Paper

FLIM and FCS measurements performed with a master oscillator fiber amplifier (MOFA) laser at 530 nm

Felix Koberling, Martin Langkopf, Dietmar Klemme, Andreas Bülter, Volker Buschmann, Kristian Lauritsen, Rainer Erdmann

Proceedings Volume 6860, 68601N (2008) https://doi.org/10.1117/12.761229

KEYWORDS: Semiconductor lasers, Luminescence, Fluorescence lifetime imaging, Fluorescence correlation spectroscopy, Fiber amplifiers, Confocal microscopy, Microscopes, Fiber lasers, Pulsed laser operation, Picosecond phenomena

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Proceedings Article | 28 April 2005 Paper

Amplified picosecond diode lasers for diffuse optical imaging and spectroscopy of tissue

R. Erdmann, M. Langkopf, K. Lauritsen, A. Bulter, M. Wahl, H. Wabnitz, A. Liebert, M. Moller, T. Schmitt

Proceedings Volume 5693, (2005) https://doi.org/10.1117/12.590419

KEYWORDS: Semiconductor lasers, Diffuse optical imaging, Optical spectroscopy, Picosecond phenomena, Spectroscopy, Imaging spectroscopy, Optical spectroscopy imaging, Tissue optics, Laser tissue interaction, Optical tomography

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Proceedings Article | 30 March 2005 Paper

Time-resolved laser scanning microscopy with FLIM and advanced FCS capability

Benedict Kraemer, Felix Koberling, Uwe Ortmann, Michael Wahl, Peter Kapusta, Andreas Buelter, Rainer Erdmann

Proceedings Volume 5700, (2005) https://doi.org/10.1117/12.590500

KEYWORDS: Laser scanners, Data acquisition, Microscopes, Picosecond phenomena, Sensors, Luminescence, Fluorescence lifetime imaging, Fluorescence correlation spectroscopy, Semiconductor lasers, Microscopy

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We present the technical integration of state-of-the-art picosecond diode laser sources and data acquisition electronics in conventional laser scanning microscopes. This procedure offers users of laser scanning microscopes an easy upgrade path towards time-resolved measurements. Our setup uses picosecond diode lasers from 375 to 800 nm for excitation which are coupled to the microscope via a single mode fiber. The corresponding emission is guided to a fibre coupled photon counting detector, such as Photomultiplier Tubes (PMT) or Single Photon Avalanche Diodes (SPAD). This combines the outstanding sensitivity of photon counting detectors with the ease of use of diode laser sources, to allow time-resolved measurements of fluorescence decays with resolutions down to picoseconds. The synchronization signals from the laser scanning microscope are fed into the data stream recorded by the TimeHarp 200 TCSPC system, via the unique Time-Tagged Time-Resolved (TTTR) data acquisition mode. In this TTTR data acquisition mode each photon is recorded individually with its specific parameters as detector channel, picosecond timing, global arrival time and, in this special application, up to three additional markers. These markers, in combination with the global arrival time, allow the system software to reconstruct the complete image and subsequently create the full fluorescence lifetime image (FLIM). The multi-parameter data acquisition scheme of the TimeHarp 200 electronics not only records each parameter individually, but offers in addition the opportunity to analyse the parameter dependencies in a multitude of different ways. This method allows for example to calculate the fluorescence fluctuation correlation function (FCS) on any single spot of interest but also to reconstruct the fluorescence decay of each image pixel and detector channel for advanced Forster Resonance Energy Transfer (FRET) analysis. In this paper, we present some selected results acquired with standard laser scanning microscopes upgraded towards temporal resolution.

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