Dr. Johan Stigwall Profile

Dr. Johan Stigwall

Expert Engineer at Hexagon Technology Center

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Publications (3)

Proceedings Article | 1 September 2004 Paper

Experimental evaluation of an ultrafast free-space optical analog-to-digital conversion scheme using a tunable semiconductor laser

Johan Stigwall, Sheila Galt, Sverker Hard

Proceedings Volume 5466, (2004) https://doi.org/10.1117/12.547443

KEYWORDS: Diffractive optical elements, Reflectors, Sensors, Semiconductor lasers, Tunable lasers, Free space optics, Analog electronics, Diffraction gratings, Signal to noise ratio, Modulation

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Proceedings Article | 6 February 2004 Paper

Characterization of depolarizing fringing fields of a liquid crystal spatial light modulator for laser beam steering

Emil Haellstig, Torleif Martin, Johan Stigwall, Lars Sjoqvist, Mikael Lindgren

Proceedings Volume 5237, (2004) https://doi.org/10.1117/12.510990

KEYWORDS: Liquid crystals, Polarization, Spatial light modulators, Diffraction, Diffraction gratings, Finite-difference time-domain method, Binary data, Phase modulation, Beam steering, Electrodes

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Proceedings Article | 21 August 2003 Paper

Laser beam steering and tracking using a liquid crystal spatial light modulator

Emil Haellstig, Johan Stigwall, Mikael Lindgren, Lars Sjoqvist

Proceedings Volume 5087, (2003) https://doi.org/10.1117/12.486892

KEYWORDS: Spatial light modulators, Beam steering, Diffraction, Liquid crystals, Sensors, CCD cameras, Phase modulation, Phase shift keying, Phase measurement, Beam splitters

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