Dr. Alexander Krüger Profile

Dr. Alexander Krüger

at WRAGT Global Investment GmbH

SPIE Involvement:

Author

Publications (22)

SPIE Journal Paper | 14 December 2016 Open Access

Adaptive optics assisted and optical coherence tomography guided fs-laser system for ophthalmic surgery in the posterior eye

Ben Matthias, Miroslav Zabic, Dorothee Brockmann, Alexander Krüger, Tammo Ripken

JBO, Vol. 21, Issue 12, 121512, (December 2016) https://doi.org/10.1117/12.10.1117/1.JBO.21.12.121512

KEYWORDS: Optical coherence tomography, Adaptive optics, Laser cutting, Eye, Eye models, Surgery, Aberration correction, Tissues, Wavefronts, Retina

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Proceedings Article | 7 March 2016 Paper

Time resolved digital-holographic analysis of femtosecond laser-induced photodisruption

Emanuel Saerchen, Johannes Wenzel, Georgios Antonopoulos, Alexander Krueger, Holger Lubatschowski, Tammo Ripken

Proceedings Volume 9706, 97060Q (2016) https://doi.org/10.1117/12.2211013

KEYWORDS: Femtosecond phenomena, Laser therapeutics, Surgery, Pulsed laser operation, Laser vision correction, Laser systems engineering, Laser processing, Laser tissue interaction, Water, Picosecond phenomena, Phase measurement, Laser cutting, Refractive index, Laser beam diagnostics

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Proceedings Article | 7 March 2016 Paper

Chromatically encoded high-speed photography of cavitation bubble dynamics inside inhomogeneous ophthalmic tissue

N. Tinne, B. Matthias, F. Kranert, C. Wetzel, A. Krüger, T. Ripken

Proceedings Volume 9706, 97060R (2016) https://doi.org/10.1117/12.2211042

KEYWORDS: High speed photography, Cavitation, Laser tissue interaction, Photography, Light emitting diodes, Colorimetry, Computer programming, Laser optics, Tissue optics, Ultrafast phenomena, Picosecond phenomena, Tissues

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Proceedings Article | 1 March 2016 Presentation + Paper

Signal and response properties indicate an optoacoustic effect underlying the intra-cochlear laser-optical stimulation

Nicole Kallweit, Peter Baumhoff, Alexander Krueger, Nadine Tinne, Alexander Heisterkamp, Andrej Kral, Hannes Maier, Tammo Ripken

Proceedings Volume 9689, 96892G (2016) https://doi.org/10.1117/12.2210926

KEYWORDS: Pulsed laser operation, Laser optics, Signal attenuation, Absorption, Infrared radiation, Sensors, Neurons, Acoustics, Water, Laser systems engineering, In vivo imaging, Signal detection

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SPIE Journal Paper | 25 June 2015

Automated working distance adjustment enables optical coherence tomography of the human larynx in awake patients

Sabine Donner, Sebastian Bleeker, Tammo Ripken, Martín Ptok, Michael Jungheim, Alexander Krueger

JMI, Vol. 2, Issue 02, 026003, (June 2015) https://doi.org/10.1117/12.10.1117/1.JMI.2.2.026003

KEYWORDS: Optical coherence tomography, Tissues, Endoscopes, Video, Imaging systems, Tissue optics, Natural surfaces, Endoscopy, Mirrors, Biopsy

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Proceedings Article | 20 March 2015 Paper

Concept for image-guided vitreo-retinal fs-laser surgery: adaptive optics and optical coherence tomography for laser beam shaping and positioning

Ben Matthias, Dorothee Brockmann, Anja Hansen, Konstanze Horke, Gesche Knoop, Timo Gewohn, Miroslav Zabic, Alexander Krüger, Tammo Ripken

Proceedings Volume 9307, 93070Z (2015) https://doi.org/10.1117/12.2077606

KEYWORDS: Optical coherence tomography, Adaptive optics, Laser cutting, Eye models, Eye, Laser therapeutics, Surgery, Laser vision correction, Image-guided intervention, Tissues

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SPIE Journal Paper | 28 April 2014 Open Access

Effects of cavitation bubble interaction with temporally separated fs-laser pulses

Nadine Tinne, Gesche Knoop, Nicole Kallweit, Sonja Veith, Sebastian Bleeker, Holger Lubatschowski, Alexander Krüger, Tammo Ripken

JBO, Vol. 19, Issue 04, 048001, (April 2014) https://doi.org/10.1117/12.10.1117/1.JBO.19.4.048001

KEYWORDS: Pulsed laser operation, Cavitation, Laser energy, Laser tissue interaction, Laser optics, Laser damage threshold, Photodiodes, Laser systems engineering, Laser cutting, Photography

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Proceedings Article | 6 March 2014 Paper

Optical stimulation of the hearing and deaf cochlea under thermal and stress confinement condition

M. Schultz, P. Baumhoff, N. Kallweit, M. Sato, A. Krüger, T. Ripken, T. Lenarz, A. Kral

Proceedings Volume 8928, 892816 (2014) https://doi.org/10.1117/12.2039256

KEYWORDS: Pulsed laser operation, Nerve, Ocean optics, Thermography, Water, Laser optics, In vivo imaging, Near infrared, Action potentials, Electrodes

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Proceedings Article | 4 March 2014 Paper

Automated working distance adjustment for a handheld OCT-Laryngoscope

Sabine Donner, Sebastian Bleeker, Tammo Ripken, Alexander Krueger

Proceedings Volume 8926, 892621 (2014) https://doi.org/10.1117/12.2035790

KEYWORDS: Optical coherence tomography, Tissues, Endoscopes, Video, Endoscopy, Natural surfaces, Mirrors, Tissue optics, Cameras, Biopsy

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Proceedings Article | 27 February 2014 Paper

Towards femtosecond laser surgery guidance in the posterior eye: utilization of optical coherence tomography and adaptive optics for focus positioning and shaping

Alexander Krüger, Anja Hansen, Ben Matthias, Tammo Ripken

Proceedings Volume 8935, 89350L (2014) https://doi.org/10.1117/12.2036950

KEYWORDS: Optical coherence tomography, Adaptive optics, Eye, Surgery, Laser cutting, Laser therapeutics, Deformable mirrors, Point spread functions, Wavefronts, Laser vision correction

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Proceedings Article | 26 February 2014 Paper

Pulse-to-pulse interaction analysis and parameter optimization for future-generation ophthalmic laser systems

N. Tinne, B. Kaune, S. Bleeker, H. Lubatschowski, A. Krüger, T. Ripken

Proceedings Volume 8941, 89410D (2014) https://doi.org/10.1117/12.2036170

KEYWORDS: Cavitation, Pulsed laser operation, Laser tissue interaction, Laser cutting, Laser systems engineering, Laser therapeutics, Laser energy, Laser scanners, Photography, Tissues

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Proceedings Article | 24 June 2013 Paper

Concept for tremor compensation for a handheld OCT-laryngoscope

Sabine Donner, Stefanie Deutsch, Sebastian Bleeker, Tammo Ripken, Alexander Krüger

Proceedings Volume 8805, 880503 (2013) https://doi.org/10.1117/12.2032388

KEYWORDS: Optical coherence tomography, Tissue optics, Tissues, Endoscopy, Relays, Biomedical optics, Diagnostics, Image analysis, Error analysis, Natural surfaces

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Proceedings Article | 24 June 2013 Paper

Physics of temporal pulse-to-pulse interaction and its consecution to future generation ophthalmic laser systems

N. Tinne, G. Knoop, N. Kallweit, H. Lubatschowski, A. Krüger, T. Ripken

Proceedings Volume 8803, 880302 (2013) https://doi.org/10.1117/12.2032315

KEYWORDS: Pulsed laser operation, Cavitation, Laser tissue interaction, Laser cutting, Laser optics, Laser systems engineering, Water, Tissue optics, Laser energy, Laser therapeutics

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Proceedings Article | 26 March 2013 Paper

Adaptive optics for reduced threshold energy in femtosecond laser induced optical breakdown in water based eye model

Anja Hansen, Alexander Krueger, Tammo Ripken

Proceedings Volume 8567, 85672F (2013) https://doi.org/10.1117/12.2015298

KEYWORDS: Adaptive optics, Eye models, Femtosecond phenomena, Wavefronts, Eye, Aberration correction, Scattering, Surgery, Tissue optics, Water

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Proceedings Article | 15 February 2013 Paper

Impact of a temporal pulse overlap on laser-tissue-interaction of modern ophthalmic laser systems

N. Tinne, G. Knoop, N. Kallweit, E. Lübking, H. Lubatschowski, A. Krüger, T. Ripken

Proceedings Volume 8579, 857903 (2013) https://doi.org/10.1117/12.2003041

KEYWORDS: Pulsed laser operation, Cavitation, Laser tissue interaction, Laser energy, Laser systems engineering, Laser optics, Water, Laser vision correction, Laser scattering, Laser therapeutics

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Proceedings Article | 3 March 2010 Paper

Three-dimensional multimodal microscopy of rabbit cornea after cross-linking treatment

A. Krüger, M. Hovakimyan, D. Ramírez, R.-A. Lorbeer, M. Kröger, O. Stachs, A. Wree, R. Guthoff, H. Lubatschowski, A. Heisterkamp

Proceedings Volume 7550, 755002 (2010) https://doi.org/10.1117/12.842282

KEYWORDS: Second-harmonic generation, Cornea, Confocal microscopy, Microscopy, Reflectivity, Collagen, Femtosecond phenomena, Visualization, Two photon excitation microscopy, Luminescence

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Proceedings Article | 20 February 2010 Paper

In vivo optical coherence tomography of percutaneous implants in hairless mice

S. Donner, F. Witte, I. Bartsch, F. Petraglia, O. Massow, M. Heidrich, H. Lubatschowski, A. Heisterkamp, A. Krüger

Proceedings Volume 7554, 75540S (2010) https://doi.org/10.1117/12.841640

KEYWORDS: Optical coherence tomography, Tissues, In vivo imaging, Interfaces, Skin, Inflammation, Tissue optics, Biopsy, Mirrors, Animal model studies

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SPIE Journal Paper | 1 September 2009 Open Access

Simultaneous three-dimensional optical coherence tomography and intravital microscopy for imaging subpleural pulmonary alveoli in isolated rabbit lungs

Sven Meissner, Lilla Knels, Alexander Krueger, Thea Koch, Edmund Koch

JBO, Vol. 14, Issue 05, 054020, (September 2009) https://doi.org/10.1117/12.10.1117/1.3247149

KEYWORDS: Optical coherence tomography, Lung, 3D image processing, Mechanics, Microscopy, Image segmentation, Tissues, In vivo imaging, 3D modeling, Imaging systems

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Proceedings Article | 14 July 2009 Paper

A laryngoscope for office-based imaging of human vocal folds using OCT

H. Wisweh, N. Rohrbeck, A. Krüger, M. Kraft, K. Aleksandrov, H. Lubatschowski

Proceedings Volume 7372, 73720I (2009) https://doi.org/10.1117/12.831820

KEYWORDS: Optical coherence tomography, Tissues, Video, Imaging systems, Motion measurement, Neck, Doppler effect, Laser development, Motion analysis, Light sources

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Proceedings Article | 1 July 2009 Paper

Reflective confocal laser scanning microscopy and nonlinear microscopy of cross-linked rabbit cornea

Alexander Krueger, Marina Hovakimyan, Diego Ramirez, Oliver Stachs, Rudolf Guthoff, Alexander Heisterkamp

Proceedings Volume 7367, 736719 (2009) https://doi.org/10.1117/12.831478

KEYWORDS: Cornea, Second-harmonic generation, Reflectivity, Confocal microscopy, Microscopy, Scanning helium ion microscopy, Collagen, Signal detection, Wound healing, Confocal laser scanning microscopy

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Proceedings Article | 11 July 2007 Paper

Investigation of murine vasodynamics by Fourier domain optical coherence tomography

Sven Meißner, Gregor Müller, Julia Walther, Alexander Krüger, Maximiliano Cuevas, Birgit Eichhorn, Ursula Ravens, Henning Morawietz, Edmund Koch

Proceedings Volume 6627, 66270D (2007) https://doi.org/10.1117/12.728163

KEYWORDS: Optical coherence tomography, Blood vessels, Resistance, Potassium, In vivo imaging, Scanners, Head, 3D image processing, Image analysis, Near infrared

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Proceedings Article | 11 July 2007 Paper

Three-dimensional Fourier-domain optical coherence tomography of alveolar mechanics in stepwise inflated and deflated isolated and perfused rabbit lungs

Alexander Krueger, Lilla Knels, Sven Meissner, Martina Wendel, Axel Heller, Thomas Lambeck, Thea Koch, Edmund Koch

Proceedings Volume 6627, 662707 (2007) https://doi.org/10.1117/12.727891

KEYWORDS: Lung, Optical coherence tomography, Image segmentation, Image processing, Mechanics, 3D image processing, Mirrors, Tissues, Scanners, Image acquisition

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Showing 5 of 22 publications

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