Dr. Michael Wahl Profile

Dr. Michael Wahl

Senior Scientist/Head of Electronic Development at PicoQuant GmbH

SPIE Involvement:

Conference Program Committee | Author

Publications (42)

Proceedings Article | 13 March 2024 Presentation

Small SPAD-arrays for confocal fluoresence lifetime imaging

Felix Koberling, Max Tillmann, Tino Roehlicke, Michael Wahl, Rainer Erdmann, Ivan Michel Antolovic

Proceedings Volume PC12847, PC128470Y (2024) https://doi.org/10.1117/12.3001460

KEYWORDS: Confocal microscopy, Time correlated single photon counting, Fluorescence lifetime imaging, Fluorescence correlation spectroscopy, Super resolution, Single photon detectors, Imaging technologies, Data processing

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Proceedings Article | 12 March 2024 Presentation

High resolution event time tagger with ultra short dead-time

Felix Koberling, Tino Roehlicke, Hans-Jürgen Rahn, Nicolai Adelhöfer, Torsten Krause, Torsten Langer, Florian Weigert, Michael Wahl, Rainer Erdmann, Uwe Ortmann

Proceedings Volume PC12893, PC128930D (2024) https://doi.org/10.1117/12.3001488

KEYWORDS: Equipment, Time correlated single photon counting, Quantum channels, Single photon detectors, Quantum optics applications, Fluorescence lifetime imaging, Design and modelling, Visualization, Visual analytics, Superconductors

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Proceedings Article | 15 March 2023 Presentation

Small SPAD-arrays for confocal fluoresence lifetime imaging (Conference Presentation)

Max Tillmann, Felix Koberling, Tino Roehlicke, Michael Wahl, Cyril Saudan, Harald Homulle, Ivan Michel Antolovic, Rainer Erdmann

Proceedings Volume PC12384, PC123840G (2023) https://doi.org/10.1117/12.2655332

KEYWORDS: Confocal microscopy, Microscopy, Fluorescence lifetime imaging, Fluorescence correlation spectroscopy, Super resolution, Single photon detectors, Single photon, Signal to noise ratio, Imaging technologies, Data processing

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Proceedings Article | 9 March 2023 Presentation

Advanced data preprocessing features for state-of-the-art TCSPC and time-tagging devices

Torsten Langer, Max Tillmann, Tino Roehlicke, Michael Wahl, Rainer Erdmann, Felix Koberling

Proceedings Volume PC12446, PC1244612 (2023) https://doi.org/10.1117/12.2649759

KEYWORDS: Ranging, LIDAR, Heart, Fluorescent markers, Field programmable gate arrays, Data compression, Analytical research

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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 Presentation

Multi-channel event timer with external FPGA interface

Torsten Langer, Tino Roehlicke, Sebastian Kulisch, Maximilian Diedrich, Michael Wahl, Rainer Erdmann, Mario Gerecke, Uwe Ortmann

Proceedings Volume PC11965, PC119650F (2022) https://doi.org/10.1117/12.2609343

KEYWORDS: Field programmable gate arrays, Single photon, Fluorescence lifetime imaging, Electronics

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Proceedings Article | 7 March 2022 Poster

High throughput multi-channel time tagger with external FPGA interface

Torsten Langer, Uwe Ortmann, Mario Gerecke, Tino Roehlicke, Sebastian Kulisch, Maximilian Diedrich, Michael Wahl

Proceedings Volume PC12015, PC120151A (2022) https://doi.org/10.1117/12.2607042

KEYWORDS: Interfaces, Field programmable gate arrays, Single photon, Quantum optics, Photodetectors, Fluorescence lifetime imaging, Data processing, Data acquisition, Applied physics

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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 | 5 March 2021 Presentation

Visualizing dynamic processes with rapidFLIMHiRes, the ultra fast FLIM imaging method with outstanding 10ps time resolution

Maria Loidolt-Krüger, Fabian Jolmes, Matthias Patting, Michael Wahl, Evangelos Sismakis, André Devaux, Uwe Ortmann, Felix Koberling, Rainer Erdmann

Proceedings Volume 11648, 116480D (2021) https://doi.org/10.1117/12.2583477

KEYWORDS: Fluorescence lifetime imaging, Visualization, Ultrafast imaging, Image resolution, Temporal resolution, Sensors, Picosecond phenomena, Fluorescence resonance energy transfer, Tissues, Single photon

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Proceedings Article | 5 March 2021 Presentation

Visualizing dynamic processes with rapidFLIMHiRes, the ultra fast FLIM imaging method with outstanding 10ps time resolution

Maria Loidolt-Krüger, Fabian Jolmes, Matthias Patting, Michael Wahl, Evangelos Sismakis, André Devaux, Uwe Ortmann, Felix Koberling, Rainer Erdmann

Proceedings Volume 11654, 116540I (2021) https://doi.org/10.1117/12.2583684

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Proceedings Article | 4 March 2019 Presentation

Spectrally resolved and high speed TCSPC-based fluorescence lifetime imaging (Conference Presentation)

Tino Roehlicke, Matthias Patting, Hans-Juergen Rahn, Benedikt Kraemer, Michael Wahl, Felix Koberling, Rainer Erdmann

Proceedings Volume 10889, 108890Q (2019) https://doi.org/10.1117/12.2513895

KEYWORDS: Fluorescence lifetime imaging, Signal detection, Sensors, Live cell imaging, Single photon, Luminescence, Electronics, Image acquisition, Picosecond phenomena, Confocal microscopy

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Proceedings Article | 4 March 2019 Presentation

Quantitative ultra-fast FLIM and lifetime based multi-species analysis (Conference Presentation)

Benedikt Kraemer, Sumeet Rohilla, Rhys Dowler, Marcus Sackrow, Matthias Patting, Hans-Jürgen Rahn, Michael Wahl, Uwe Ortmann, Felix Koberling, Andreas Hocke, Rainer Erdmann

Proceedings Volume 10882, 108820K (2019) https://doi.org/10.1117/12.2507396

KEYWORDS: Fluorescence lifetime imaging, Ultrafast phenomena, Tissues, Image processing, Luminescence, Confocal microscopy, Life sciences, Photomultipliers, Sensors, Spatial resolution

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SPIE Journal Paper | 22 January 2018

Fluorescence decay data analysis correcting for detector pulse pile-up at very high count rates

Matthias Patting, Paja Reisch, Marcus Sackrow, Rhys Dowler, Marcelle Koenig, Michael Wahl

OE, Vol. 57, Issue 03, 031305, (January 2018) https://doi.org/10.1117/12.10.1117/1.OE.57.3.031305

KEYWORDS: Sensors, Luminescence, Fluorescence lifetime imaging, Data analysis, Error analysis, Photodetectors, Single photon, Confocal microscopy, Electronics, Time correlated photon counting

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Proceedings Article | 24 April 2017 Presentation

Rapid FLIM: The new and innovative method for ultra-fast imaging of biological processes (Conference Presentation)

Sandra Orthaus-Mueller, Benedikt Kraemer, Astrid Tannert, Tino Roehlicke, Michael Wahl, Hans-Juergen Rahn, Felix Koberling, Rainer Erdmann

Proceedings Volume 10069, 1006919 (2017) https://doi.org/10.1117/12.2249757

KEYWORDS: Ultrafast phenomena, Data acquisition, Sensors, Photons, Fluorescence lifetime imaging, Signal processing, Single photon, Fluorescence resonance energy transfer, Image processing, Time resolved spectroscopy

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Proceedings Article | 29 May 2013 Paper

High speed multichannel time-correlated single photon counting electronics based on SiGe integrated time-to-digital converters

Michael Wahl, Tino Röhlicke, Hans-Jürgen Rahn, Volker Buschmann, Nick Bertone, Gerald Kell

Proceedings Volume 8727, 87270W (2013) https://doi.org/10.1117/12.2018039

KEYWORDS: Picosecond phenomena, Luminescence, Single photon, Electronics, Quantum optics, Signal detection, Molecules, Field programmable gate arrays, Fluorescence lifetime imaging, Photodetectors

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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 | 11 February 2011 Paper

Fast algorithms for the analysis of spectral FLIM data

I. Gregor, B. Krämer, F. Koberling, R. Erdmann, J. Enderlein, M. Wahl, S. Fore

Proceedings Volume 7903, 790330 (2011) https://doi.org/10.1117/12.873386

KEYWORDS: Fluorescence lifetime imaging, Luminescence, Fluorescence resonance energy transfer, Signal detection, Data conversion, Single photon, Picosecond phenomena, Microscopes, Statistical analysis, Fluorescence spectroscopy

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Proceedings Article | 25 February 2009 Paper

New multichannel photon timing instrumentation with independent synchronized channels and high count rate for FLIM and correlation analysis

Michael Wahl, Gerald Kell, Peter Kapusta, Hans-Jürgen Rahn, Tino Roehlicke, Rainer Erdmann

Proceedings Volume 7183, 71830C (2009) https://doi.org/10.1117/12.808716

KEYWORDS: Sensors, Luminescence, Fluorescence lifetime imaging, Molecules, Fluorescence correlation spectroscopy, Microchannel plates, Picosecond phenomena, Signal detection, Photodetectors, Electronics

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Proceedings Article | 25 February 2009 Paper

Comparison of background corrected fluorescence correlation spectroscopy and fluorescence lifetime correlation spectroscopy: dilution series revisited

Steffen Rüttinger, Peter Kapusta, Matthias Patting, Michael Wahl, Rainer Macdonald

Proceedings Volume 7185, 718508 (2009) https://doi.org/10.1117/12.808883

KEYWORDS: Fluorescence correlation spectroscopy, Sensors, Luminescence, Photons, Confocal microscopy, Scattering, Fluorescence spectroscopy, Spectroscopy, Light scattering, Signal detection

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Proceedings Article | 25 February 2009 Paper

Recent advances in photon coincidence measurements for photon antibunching and full correlation analysis

F. Koberling, B. Kraemer, V. Buschmann, S. Ruettinger, P. Kapusta, M. Patting, M. Wahl, R. Erdmann

Proceedings Volume 7185, 71850Q (2009) https://doi.org/10.1117/12.807803

KEYWORDS: Molecules, Signal detection, Sensors, Picosecond phenomena, Luminescence, Fluorescence correlation spectroscopy, Diffusion, Confocal microscopy, Electronics, Time metrology

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Proceedings Article | 21 February 2008 Paper

Recent advances in time-correlated single-photon counting

Felix Koberling, Benedikt Krämer, Sebastian Tannert, Steffen Rüttinger, Uwe Ortmann, Matthias Patting, Michael Wahl, Benjamin Ewers, Peter Kapusta, Rainer Erdmann

Proceedings Volume 6862, 686209 (2008) https://doi.org/10.1117/12.761161

KEYWORDS: Fluorescence correlation spectroscopy, Photons, Luminescence, Sensors, Diffusion, Pulsed laser operation, Picosecond phenomena, Confocal microscopy, Molecules, Light scattering

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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 October 2007 Paper

Bunch fill pattern at BESSY monitored by time-correlated single photon counting

Karsten Holldack, Michael v. Hartrott, Frank Hoeft, Oliver Neitzke, Erik Bauch, Michael Wahl

Proceedings Volume 6771, 677118 (2007) https://doi.org/10.1117/12.734226

KEYWORDS: Picosecond phenomena, Avalanche photodetectors, Sensors, X-rays, Electronics, Single photon, Synchrotron radiation, X-ray detectors, Control systems, Photon counting

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Proceedings Article | 15 October 2007 Paper

A system for one-way ranging and positioning using differential TCSPC

Matthias Fuhrland, Lukas Eng, Michael Wahl

Proceedings Volume 6771, 677116 (2007) https://doi.org/10.1117/12.734034

KEYWORDS: Sensors, Ranging, Photons, Time metrology, Picosecond phenomena, Pulsed laser operation, Signal detection, Semiconductor lasers, Calibration, Beam shaping

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Proceedings Article | 11 May 2007 Paper

Dead-time effects in TCSPC data analysis

Matthias Patting, Michael Wahl, Peter Kapusta, Rainer Erdmann

Proceedings Volume 6583, 658307 (2007) https://doi.org/10.1117/12.722804

KEYWORDS: Data modeling, Photodetectors, Picosecond phenomena, Sensors, Data analysis, Time correlated photon counting, Error analysis, Luminescence, Single photon, Monochromators

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Proceedings Article | 11 May 2007 Paper

Advanced TCSPC electronics and their use in general quantum physics and demanding analytical applications

Michael Wahl, Hans-Juergen Rahn, Matthias Patting, Felix Koberling, Rainer Erdmann

Proceedings Volume 6583, 658306 (2007) https://doi.org/10.1117/12.722799

KEYWORDS: Photons, Luminescence, Picosecond phenomena, Molecules, Electronics, Sensors, Time metrology, Fluorescence correlation spectroscopy, Fluorescence lifetime imaging, Quantum physics

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Proceedings Article | 11 May 2007 Paper

Fluorescence lifetime correlation spectroscopy

Jana Humpolickova, Jan Sýkora, Petr Kapusta, Michael Wahl, Ales Benda, Jorg Enderlein, Martin Hof

Proceedings Volume 6583, 658308 (2007) https://doi.org/10.1117/12.736637

KEYWORDS: Fluorescence correlation spectroscopy, Luminescence, Diffusion, Fluorescence spectroscopy, Sensors, Spectroscopy, Single photon, Molecules, Particles, Microscopes

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Proceedings Article | 11 May 2007 Paper

Time-resolved confocal fluorescence microscopy: novel technical features and applications for FLIM, FRET and FCS using a sophisticated data acquisition concept in TCSPC

Felix Koberling, Benedikt Krämer, Peter Kapusta, Matthias Patting, Michael Wahl, Rainer Erdmann

Proceedings Volume 6583, 65830Y (2007) https://doi.org/10.1117/12.722867

KEYWORDS: Fluorescence resonance energy transfer, Luminescence, Molecules, Fluorescence correlation spectroscopy, Confocal microscopy, Fluorescence lifetime imaging, Data acquisition, Molecular photonics, Microscopy, Picosecond phenomena

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In recent years time-resolved fluorescence measurement and analysis techniques became a standard in single molecule microscopy. However, considering the equipment and experimental implementation they are typically still an add-on and offer only limited possibilities to study the mutual dependencies with common intensity and spectral information. In contrast, we are using a specially designed instrument with an unrestricted photon data acquisition approach which allows to store spatial, temporal, spectral and intensity information in a generalized format preserving the full experimental information. This format allows us not only to easily study dependencies between various fluorescence parameters but also to use, for example, the photon arrival time for sorting and weighting the detected photons to improve the significance in common FCS and FRET analysis schemes. The power of this approach will be demonstrated for different techniques: In FCS experiments the concentration determination accuracy can be easily improved by a simple time-gated photon analysis to suppress the fast decaying background signal. A more detailed analysis of the arrival times allows even to separate FCS curves for species which differ in their fluorescence lifetime but, for example, cannot be distinguished spectrally. In multichromophoric systems like a photonic wire which undergoes unidirectional multistep FRET the lifetime information complements significantly the intensity based analysis and helps to assign the respective FRET partners. Moreover, together with pulsed excitation the time-correlated analysis enables directly to take advantage of alternating multi-colour laser excitation. This pulsed interleaved excitation (PIE) can be used to identify and rule out inactive FRET molecules which cause interfering artefacts in standard FRET efficiency analysis. We used a piezo scanner based confocal microscope with compact picosecond diode lasers as excitation sources. The timing performance can be significantly increased by using new SPAD detectors which enable, in conjunction with new TCSPC electronics, an overall IRF width of less than 120 ps maintaining single molecule sensitivity.

Proceedings Article | 3 November 2006 Paper

Application of a new time-correlated single photon counting instrument in a fiber-based quantum cryptography system

Iris P. S. Choi, Harendra N. J. Fernando, Paul Townsend, Michael Wahl

Proceedings Volume 6372, 637210 (2006) https://doi.org/10.1117/12.686152

KEYWORDS: Quantum key distribution, Sensors, Coarse wavelength division multiplexing, Phase shifts, Data modeling, Single photon, Quantum cryptography, Raman scattering, Picosecond phenomena, Data acquisition

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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.

Proceedings Article | 18 June 2004 Paper

Compact TCSPC upgrade package for laser scanning microscopes based on 375- to 470-nm picosecond diode lasers

Uwe Ortmann, T. Dertinger, Michael Wahl, Matthias Patting, Rainer Erdmann

Proceedings Volume 5325, (2004) https://doi.org/10.1117/12.536888

KEYWORDS: Laser scanners, Luminescence, Sensors, Semiconductor lasers, Picosecond phenomena, Data acquisition, Microscopes, Photon counting, Signal detection, Fluorescence lifetime imaging

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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 offers users of laser scanning microscopes an easy upgrade path towards time-resolved measurements. Our setup uses picosecond diode lasers from 375 nm, 405 nm, 440 nm and 470 nm for fluorescence excitation which are coupled in through a sole single mode fiber. The detected signal is guided to a 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 TCSPC5,7 system, via the unique Time-Tagged Time-Resolved (TTTR)6 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 fit the full fluorescence lifetime image. 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 not only 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 the purpose of Fluorescence Lifetime Imaging (FLIM) or advanced Fluorescence Resonance Energy Transfer (FRET) analysis. We present here some selected results acquired with standard laser scanning microscopes upgraded for the time-correlated single photon counting technique.

Proceedings Article | 14 October 2003 Paper

Two-channel fluorescence lifetime microscope with two colour laser excitation, single-molecule sensitivity, and submicrometer resolution

Felix Koberling, Michael Wahl, Matthias Patting, Hans-Juergen Rahn, Peter Kapusta, Rainer Erdmann

Proceedings Volume 5143, (2003) https://doi.org/10.1117/12.500610

KEYWORDS: Luminescence, Molecules, Microscopes, Fluorescence lifetime imaging, Sensors, Fluorescence correlation spectroscopy, Polarization, Picosecond phenomena, Single photon, Electronics

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Proceedings Article | 16 April 2002 Paper

Application of sub-ns pulsed LEDs in fluorescence lifetime spectroscopy

Michael Wahl, Uwe Ortmann, Kristian Lauritsen, Rainer Erdmann

Proceedings Volume 4648, (2002) https://doi.org/10.1117/12.462651

KEYWORDS: Luminescence, Light emitting diodes, Picosecond phenomena, Semiconductor lasers, Molecules, Single photon, Electronics, Light sources, Fluorescence spectroscopy, Spectroscopy

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Proceedings Article | 28 March 2002 Paper

Fluorescence lifetime imaging system with nm-resolution and single-molecule sensitivity

Michael Wahl, Hans-Juergen Rahn, Uwe Ortmann, Rainer Erdmann, Martin Boehmer, Joerg Enderlein

Proceedings Volume 4634, (2002) https://doi.org/10.1117/12.463829

KEYWORDS: Molecules, Luminescence, Picosecond phenomena, Scanners, Semiconductor lasers, Fluorescence lifetime imaging, Single photon, Clocks, Sensors, Electronics

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Proceedings Article | 23 April 2001 Paper

Michael Wahl

Proceedings Volume 4280, (2001) https://doi.org/10.1117/12.424732

KEYWORDS: Luminescence, Semiconductor lasers, Semiconductors, Sensors, Picosecond phenomena, Time correlated photon counting, Analog electronics, Single photon, Light emitting diodes, Gallium arsenide

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Proceedings Article | 3 May 1999 Paper

Simple scanning near-infrared time-correlated single-photon counting instrument with a pulsed diode laser and avalanche photodiode (APD) for time-resolved measurements in scanning applications with

Yuling Zhang, Steven Soper, Lyle Middendorf, John Wrum, Rainer Erdmann, Michael Wahl

Proceedings Volume 3602, (1999) https://doi.org/10.1117/12.347539

KEYWORDS: Avalanche photodetectors, Single photon, Microscopes, Semiconductor lasers, Luminescence, Head, Avalanche photodiodes, Picosecond phenomena, Aluminum, Sensors

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Proceedings Article | 10 April 1998 Paper

Hardware solution for continuous time-resolved burst detection of single molecules in flow

Michael Wahl, Rainer Erdmann, Kristian Lauritsen, Hans-Juergen Rahn

Proceedings Volume 3259, (1998) https://doi.org/10.1117/12.307325

KEYWORDS: Luminescence, Molecules, Field programmable gate arrays, Picosecond phenomena, Single photon, Optical resolution, Semiconductor lasers, Photon counting, Time metrology, Liquids

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Proceedings Article | 22 May 1997 Paper

All-solid-state TCPC instrument for dynamic lifetime measurements in sensitive DNA analysis

Rainer Erdmann, Michael Wahl, Kristian Lauritsen, Joerg Enderlein, Benjamin Legendre, Daryl Williams, Steven Soper

Proceedings Volume 2985, (1997) https://doi.org/10.1117/12.274364

KEYWORDS: Picosecond phenomena, Semiconductor lasers, Luminescence, Single photon, Capillaries, Solid state electronics, Solid state lasers, Electronics, Light scattering, Electro optical modeling

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Proceedings Article | 1 April 1996 Paper

High-speed electronics for the detection of time-resolved fluorescence in a continuous flow system

Rainer Erdmann, Uwe Ortmann, Joerg Enderlein, Wolfgang Becker, Michael Wahl, Edgar Klose

Proceedings Volume 2680, (1996) https://doi.org/10.1117/12.237635

KEYWORDS: Molecules, Luminescence, Photons, Picosecond phenomena, High speed electronics, Fluorescence spectroscopy, Time resolved spectroscopy, Molecular lasers, Laser induced fluorescence, Clocks

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Proceedings Article | 8 May 1995 Paper

Lifetime-based identification of single molecules

Joerg Enderlein, Rolf Krahl, Uwe Ortmann, Michael Wahl, Rainer Erdmann, Edgar Klose

Proceedings Volume 2388, (1995) https://doi.org/10.1117/12.208465

KEYWORDS: Molecules, Luminescence, Rhodamine, Photons, Bioalcohols, Molecular lasers, Time metrology, Signal detection, Electronics, Data processing

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Showing 5 of 42 publications

Conference Committee Involvement (18)

Advanced Photon Counting Techniques XVIII

23 April 2024 | National Harbor, Maryland, United States

Advanced Photon Counting Techniques XVII

2 May 2023 | Orlando, Florida, United States

Advanced Photon Counting Techniques XVI

5 April 2022 | Orlando, Florida, United States

Advanced Photon Counting Techniques XV

12 April 2021 | Online Only, Florida, United States

Advanced Photon Counting Techniques XIV

27 April 2020 | Online Only, California, United States

Advanced Photon Counting Techniques XIII

17 April 2019 | Baltimore, MD, United States

Advanced Photon Counting Techniques XII

18 April 2018 | Orlando, FL, United States

Advanced Photon Counting Techniques XI

12 April 2017 | Anaheim, CA, United States

Advanced Photon Counting Techniques X

20 April 2016 | Baltimore, MD, United States

Advanced Photon Counting Techniques IX

22 April 2015 | Baltimore, MD, United States

Advanced Photon Counting Techniques VIII

7 May 2014 | Baltimore, MD, United States

Advanced Photon Counting Techniques VII

1 May 2013 | Baltimore, Maryland, United States

Advanced Photon Counting Techniques VI

25 April 2012 | Baltimore, Maryland, United States

Advanced Photon Counting Techniques V

27 April 2011 | Orlando, Florida, United States

Advanced Photon Counting Techniques IV

7 April 2010 | Orlando, Florida, United States

Photon Counting Applications

21 April 2009 | Prague, Czech Republic

Advanced Photon Counting Techniques III

14 April 2009 | Orlando, Florida, United States

Photon Counting Applications

19 April 2007 | Prague, Czech Republic

Showing 5 of 18 Conference Committees

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