Prof. Erich Rohwer Profile

Prof. Erich Rohwer

Professor emeritus at Stellenbosch Univ

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Author

Publications (14)

Proceedings Article | 7 December 2021 Paper

Novel time domain ptychography, i2PIE, for improved contrast in nonlinear microscopy

George Dwapanyin, Dirk Spangenberg, Thomas Feurer, Alexander Heidt, Gurthwin Bosman, Pieter Neethling, Erich Rohwer

Proceedings Volume 11922, 119220O (2021) https://doi.org/10.1117/12.2615717

KEYWORDS: Phase measurement, Microscopy, Image compression, Phase shift keying, Curium, Signal to noise ratio, Spatial light modulators, Image enhancement, Tissues, Mirrors

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Proceedings Article | 26 June 2017 Paper

Development of a low-cost, 11 µm spectral domain optical coherence tomography surface profilometry prototype

Nyasha Suliali, Peter Baricholo, Pieter Neethling, Erich Rohwer

Proceedings Volume 10329, 103292Q (2017) https://doi.org/10.1117/12.2268064

KEYWORDS: Optical coherence tomography, Prototyping, Interferometers, Detection and tracking algorithms, Interferometry, Profilometers, Michelson interferometers, Metrology, Optical components, Light sources, Light emitting diodes, Mirrors

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SPIE Journal Paper | 31 January 2017

Probing insect backscatter cross section and melanization using kHz optical remote detection system

Alem Gebru, Mikkel Brydegaard, Erich Rohwer, Pieter Neethling

JARS, Vol. 11, Issue 01, 016015, (January 2017) https://doi.org/10.1117/12.10.1117/1.JRS.11.016015

KEYWORDS: Short wave infrared radiation, Backscatter, Sensors, Near infrared, Reflectivity, Hyperspectral imaging, Calibration, Remote sensing, In situ remote sensing, Modulation

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Proceedings Article | 19 September 2016 Presentation + Paper

Probing insect backscatter cross-section and melanization using kHz optical remote detection system

Alem Gebru, Mikkel Brydegaard, Erich Rohwer, Pieter Neethling

Proceedings Volume 9975, 997504 (2016) https://doi.org/10.1117/12.2236010

KEYWORDS: Short wave infrared radiation, Near infrared, Remote sensing, Reflectivity, Backscatter, Sensors, Silicon, Indium gallium arsenide, Sensing systems, Modulation

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SPIE Journal Paper | 18 December 2014

Investigation of atmospheric insect wing-beat frequencies and iridescence features using a multispectral kHz remote detection system

Alem Gebru, Erich Rohwer, Pieter Neethling, Mikkel Brydegaard

JARS, Vol. 8, Issue 01, 083503, (December 2014) https://doi.org/10.1117/12.10.1117/1.JRS.8.083503

KEYWORDS: Sensors, Near infrared, Atmospheric sensing, Silicon, Short wave infrared radiation, LIDAR, Spectroscopy, Signal detection, Scattering, Indium gallium arsenide

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Proceedings Article | 8 October 2014 Paper

Investigation of atmospheric insect wing-beat frequencies and iridescent features using a multi-spectral kHz remote detection system

Alem Gebru, Erich Rohwer, Pieter Neethling, Mikkel Brydegaard

Proceedings Volume 9221, 922106 (2014) https://doi.org/10.1117/12.2060827

KEYWORDS: Sensors, Near infrared, Silicon, Spectroscopy, Short wave infrared radiation, LIDAR, Signal detection, Thin films, Atmospheric sensing, Visible radiation

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Proceedings Article | 17 July 2014 Open Access

Expansion of student activities in Africa: from south to north

Rim Cherif, Amine Ben Salem, Amor Gueddana, Mourad Zghal, Darryl Naidoo, Andrew Forbes, Alexander Heidt, Erich Rohwer

Proceedings Volume 9289, 928914 (2014) https://doi.org/10.1117/12.2070775

KEYWORDS: Photonics, Communication engineering, Physics, Active optics, Roads, Ions, Optical communications, Silica, Laser marking, Electroluminescence

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Proceedings Article | 28 September 2013 Paper

The effect of spatial light modulator (SLM) dependent dispersion on spatial beam shaping

Dirk-Mathys Spangenberg, Angela Dudley, Pieter Neethling, Andrew Forbes, Erich Rohwer

Proceedings Volume 8843, 884308 (2013) https://doi.org/10.1117/12.2023286

KEYWORDS: Spatial light modulators, Phase shifts, Modulation, Calibration, Phase measurement, Refractive index, Beam shaping, Fourier transforms, Wavefronts, Crystals

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Proceedings Article | 15 February 2012 Paper

High-quality 3.6-fs pulses by compression of an octave-spanning supercontinuum

Jan Rothhardt, Stefan Demmler, Alexander Heidt, Alexander Hartung, Hartmut Bartelt, Erich Rohwer, Jens Limpert, Andreas Tünnermann

Proceedings Volume 8240, 82400Z (2012) https://doi.org/10.1117/12.908390

KEYWORDS: Dispersion, Optical fibers, Mirrors, Phase measurement, Physics, Phase shift keying, Modulation, Solids, Oscillators, Spatial light modulators

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Proceedings Article | 11 February 2011 Paper

Optimal control of the population dynamics of the ground vibrational state of a polyatomic molecule

Ludwig de Clercq, Lourens Botha, Erich Rohwer, Hermann Uys, Anton Du Plessis

Proceedings Volume 7925, 79250V (2011) https://doi.org/10.1117/12.874562

KEYWORDS: Molecules, Spatial light modulators, Femtosecond phenomena, Molecular interactions, Molecular lasers, Pulse shaping, Genetic algorithms, Chemical reactions, Laser development, Optimization (mathematics)

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Proceedings Article | 14 October 2010 Paper

Infrared, visible, and ultraviolet broadband coherent supercontinuum generation in all-normal dispersion fibers

Alexander Heidt, Alexander Hartung, Erich Rohwer, Hartmut Bartelt

Proceedings Volume 7839, 78390X (2010) https://doi.org/10.1117/12.867101

KEYWORDS: Optical fibers, Dispersion, Nanofibers, Ultraviolet radiation, Visible radiation, Solitons, Infrared radiation, Modulation, Supercontinuum generation, Femtosecond phenomena

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Proceedings Article | 30 August 2005 Paper

Comparison of infrared laser beam shaping by diffractive and refractive methods

Andrew Forbes, Anton du Plessis, Erich Rohwer

Proceedings Volume 5876, 58760H (2005) https://doi.org/10.1117/12.616654

KEYWORDS: Beam shaping, Diffractive optical elements, Gas lasers, Transmission electron microscopy, Laser beam propagation, Refractive index, Gaussian beams, Wavefronts, Ray tracing, Optical components

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Proceedings Article | 25 January 2001 Paper

Modeling of injection seeding of a pulsed high-pressure CO2 laser

Lourens Botha, Erich Rohwer

Proceedings Volume 4184, (2001) https://doi.org/10.1117/12.414078

KEYWORDS: Spatial light modulators, Carbon dioxide lasers, Resonators, Output couplers, Mathematical modeling, Differential equations, Reflectivity, Physics, Pulsed laser operation

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Proceedings Article | 4 May 1993 Paper

Multikilowatt TEA-CO2 laser system for molecular laser isotope separation

Einar Ronander, Erich Rohwer

Proceedings Volume 1810, (1993) https://doi.org/10.1117/12.144664

KEYWORDS: Pulsed laser operation, Gas lasers, Carbon dioxide lasers, Oscillators, Laser systems engineering, Isotope separation, Laser applications, Molecular lasers, Chemistry, Photons

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Showing 5 of 14 publications

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