Dr. David R. Selviah Profile

Dr. David R. Selviah

Senior Lecturer at Univ College London

SPIE Involvement:

Author

Publications (21)

Proceedings Article | 20 April 2015 Paper

The relationship between polymer waveguide optical interconnection end facet roughness and the optical input and output coupling losses

Hadi Baghsiahi, Kai Wang, Richard Pitwon, David Selviah

Proceedings Volume 9360, 93600O (2015) https://doi.org/10.1117/12.2079571

KEYWORDS: Waveguides, Polymers, Polymer multimode waveguides, Optics manufacturing, Optical interconnects, Connectors, Near field optics, Surface roughness, Atomic force microscopy, Silicon

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Proceedings Article | 3 April 2015 Paper

Equilibrium modal power distribution measurement of step-index hard plastic cladding and graded-index silica multimode fibers

Ruichen Tao, Takehiro Hayashi, Manabu Kagami, Shigeru Kobayashi, Manabu Yasukawa, Hui Yang, David Robinson, Hadi Baghsiahi, F. Aníbal Fernández, David Selviah

Proceedings Volume 9368, 93680N (2015) https://doi.org/10.1117/12.2079355

KEYWORDS: Optical fibers, Charge-coupled devices, Light emitting diodes, CCD cameras, Multimode fibers, Free space, Silica, Cladding, Near field, Solids

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Proceedings Article | 20 March 2015 Paper

Combining, homogenizing, and shaping beams from multiple laser emitters using multimode optical fibers and waveguides used in display systems

Hadi Baghsiahi, Sally Day, David Selviah

Proceedings Volume 9385, 938509 (2015) https://doi.org/10.1117/12.2079651

KEYWORDS: Waveguides, Beam shaping, Optical fibers, Semiconductor lasers, Fiber lasers, Objectives, Multimode fibers, Displays, Laser development, Microscopes

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Proceedings Article | 8 March 2014 Paper

Optical loss and crosstalk in multimode photolithographically fabricated polyacrylate polymer waveguide crossings

Hadi Baghsiahi, Kai Wang, David Selviah

Proceedings Volume 8988, 898807 (2014) https://doi.org/10.1117/12.2039860

KEYWORDS: Waveguides, Ray tracing, Geometrical optics, Cladding, Polymer multimode waveguides, Polymers, Sensors, Wave propagation, Computer simulations, Refractive index

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Proceedings Article | 8 March 2014 Paper

Polymer waveguide end facet roughness and optical input/output coupling loss for OPCB applications

Hadi Baghsiahi, Kai Wang, Richard Pitwon, David Selviah

Proceedings Volume 8988, 898804 (2014) https://doi.org/10.1117/12.2039785

KEYWORDS: Waveguides, Polymers, Polymer multimode waveguides, Atomic force microscopy, Optics manufacturing, Connectors, Laser cutting, Cladding, Surface roughness, Silicon

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Proceedings Article | 14 March 2013 Paper

Numerical modeling method for the dispersion characteristics of single-mode and multimode weakly-guiding optical fibers with arbitrary radial refractive index profiles

Raushan Mussina, David Selviah, F. Aníbal Fernández, Anton Tijhuis, Bastiaan de Hon

Proceedings Volume 8619, 86191R (2013) https://doi.org/10.1117/12.2002804

KEYWORDS: Refractive index, Dispersion, Cladding, Optical fibers, Silica, Wave propagation, Multimode fibers, Numerical modeling, Single mode fibers, Fluorine

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Proceedings Article | 2 February 2012 Paper

Polymer optical waveguides with reduced in-plane bend loss for electro-optical PCBs

Richard Pitwon, Callum Smith, Kai Wang, Jasper Graham-Jones, David Selviah, Markus Halter, Alex Worrall

Proceedings Volume 8264, 82640Z (2012) https://doi.org/10.1117/12.919817

KEYWORDS: Waveguides, Cladding, Polymer multimode waveguides, Polymers, Refractive index, Electro optics, Wave propagation, Photomasks, Electro optic polymers, Scattering

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Proceedings Article | 23 February 2010 Paper

Design and implementation of an electro-optical backplane with pluggable in-plane connectors

Richard Pitwon, Ken Hopkins, Kai Wang, David Selviah, Hadi Baghsiahi, Bert Offrein, Roger Dangel, Folkert Horst, Markus Halter, Max Gmür

Proceedings Volume 7607, 76070J (2010) https://doi.org/10.1117/12.841985

KEYWORDS: Waveguides, Connectors, Electro optics, Data storage, Transceivers, Interfaces, Polymers, Polymer multimode waveguides, Active optics, Optical interconnects

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Proceedings Article | 11 February 2009 Paper

Polymer multimode waveguide optical and electronic PCB manufacturing

David Selviah

Proceedings Volume 7219, 721905 (2009) https://doi.org/10.1117/12.811529

KEYWORDS: Waveguides, Polymers, Polymer multimode waveguides, Optics manufacturing, Connectors, Fabrication, Manufacturing, Copper, Ultraviolet radiation, Laser ablation

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SPIE Journal Paper | 1 January 2007

Source misalignment in multimode polymer tapered waveguides for optical backplanes

Atef Rashed, David Selviah

OE, Vol. 46, Issue 01, 015401, (January 2007) https://doi.org/10.1117/12.10.1117/1.2432875

KEYWORDS: Waveguides, Tolerancing, Vertical cavity surface emitting lasers, Polymers, Polymer multimode waveguides, Single mode fibers, Wave propagation, Cladding, Optical engineering, Beam propagation method

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Proceedings Article | 16 November 2004 Paper

Modeling of the effects of thermal gradients on optical propagation in polymer multimode tapered waveguides in optical backplanes

Atef Rashed, David Selviah

Proceedings Volume 5579, (2004) https://doi.org/10.1117/12.567127

KEYWORDS: Waveguides, Thermal effects, Thermography, Wave propagation, Polymers, Polymer multimode waveguides, Cladding, Beam propagation method, Tolerancing, Copper

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Proceedings Article | 5 August 2004 Paper

Theoretical modeling of a detection system based on optical coherence contrast

Ricardo Coutinho, David Selviah, Hugh Griffiths

Proceedings Volume 5431, (2004) https://doi.org/10.1117/12.542435

KEYWORDS: Phase shifts, Target detection, Optical filters, Gaussian filters, Interference filters, Sinc filters, Interferometers, Polarization, Coherence (optics), Performance modeling

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Proceedings Article | 6 August 2002 Paper

Coherence-based optical detection system's receiver operating characteristics (ROC) curves

Ricardo Coutinho, David Selviah, Hugh Griffiths

Proceedings Volume 4718, (2002) https://doi.org/10.1117/12.478796

KEYWORDS: Signal detection, Target detection, Receivers, Data acquisition, Interferometers, Signal to noise ratio, Tungsten, Halogens, Photodetectors, Helium neon lasers

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Proceedings Article | 7 June 2002 Paper

High-dynamic-range imaging optical detectors

Ricardo Coutinho, David Selviah, Hugh Griffiths

Proceedings Volume 4735, (2002) https://doi.org/10.1117/12.470112

KEYWORDS: Target detection, Interferometers, Mirrors, Image processing, Detection and tracking algorithms, Imaging systems, Coherence imaging, Modulation, Optical filters, Charge-coupled devices

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Proceedings Article | 14 May 2001 Paper

Angular emission profiles and coherence length measurements of highly efficient,low-voltage resonant-cavity light-emitting diodes operating around 650 nm

Jonathan Gray, Rupert Oulton, Paul Stavrinou, Mark Whitehead, Gareth Parry, Geoff Duggan, Ricardo Coutinho, David Selviah

Proceedings Volume 4278, (2001) https://doi.org/10.1117/12.426836

KEYWORDS: Monochromators, Light emitting diodes, Gallium, Integrating spheres, Aluminum, Interferometry, Quantum wells, External quantum efficiency, Sensors, Optical microcavities

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Proceedings Article | 2 May 2000 Paper

Variable-focus microlenses as a potential technology for endoscopy

Patrick Smith, Eithne McCabe, Cian Taylor, David Selviah, Sally Day, L. Commander

Proceedings Volume 3919, (2000) https://doi.org/10.1117/12.384195

KEYWORDS: Microlens, Microlens array, Switching, Crystals, Lenses, Switches, Liquid crystals, Objectives, Endoscopy, Optical fibers

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Proceedings Article | 31 March 2000 Paper

Detection of partially coherent optical emission sources

Ricardo Coutinho, David Selviah, Herbert French

Proceedings Volume 4043, (2000) https://doi.org/10.1117/12.381599

KEYWORDS: Optical filters, Interference filters, Mirrors, Interferometers, Light emitting diodes, Lamps, Phase shifts, Fourier transforms, Detection and tracking algorithms, Sensors

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Proceedings Article | 22 May 1998 Paper

Experimental verification of a computer model for optimizing a liquid crystal TV for spatial phase modulation

Mark Gardner, Robin Kilpatrick, Sally Day, Robert Renton, David Selviah

Proceedings Volume 3490, (1998) https://doi.org/10.1117/12.308856

KEYWORDS: Phase modulation, Polarizers, Phase shift keying, Liquid crystals, Modulation, Computer simulations, Diffraction, Data modeling, Spatial light modulators, Interferometers

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Proceedings Article | 23 March 1998 Paper

Liquid crystal televisions for use as spatial light modulators in a complex optical correlator

Robin Kilpatrick, John Gilby, Sally Day, David Selviah

Proceedings Volume 3386, (1998) https://doi.org/10.1117/12.304751

KEYWORDS: Optical correlators, Liquid crystals, Televisions, Polarizers, Phase modulation, Modulation, Phase shift keying, Jones calculus

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Proceedings Article | 23 March 1998 Paper

Feature enhancement and similarity suppression algorithm for noisy pattern recognition

Epaminondas Stamos, David Selviah

Proceedings Volume 3386, (1998) https://doi.org/10.1117/12.304763

KEYWORDS: Detection and tracking algorithms, Pattern recognition, Optical filters, Optical pattern recognition, Computer simulations, Algorithm development, Optical storage, Optical discs, Databases, Image filtering

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Proceedings Article | 23 January 1997 Paper

High-efficiency laser coupling in BaTiO3 mutually pumped phase-conjugate mirror using novel configurations

Chi Ching Chang, David Selviah

Proceedings Volume 2998, (1997) https://doi.org/10.1117/12.264194

KEYWORDS: Crystals, Phase conjugation, Laser crystals, Ferroelectric materials, Mirrors, Reflectivity, Laser induced plasma spectroscopy, Bridges, Photography, Laser applications

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Showing 5 of 21 publications

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