Dr. Brendan J. Roycroft Profile

Dr. Brendan J. Roycroft

Research Scientist at Tyndall National Institute

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Author

Publications (17)

Proceedings Article | 9 December 2021 Paper

Colorectal neoplastic polyps imaged by fibre-based optical coherence tomography

Carlos Reyes, Brian Corbett, Brendan Roycroft

Proceedings Volume 11924, 119241I (2021) https://doi.org/10.1117/12.2616140

KEYWORDS: Optical coherence tomography, Tissues, Colon, Tissue optics, Imaging systems, Image resolution, Single mode fibers, Visualization, Scattering, Endoscopy

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Proceedings Article | 24 February 2020 Presentation + Paper

Heterogeneous integration of III-V based photonics with silicon

Brian Corbett, Fatih Atar, Megan O'Brien, James O'Callaghan, John Justice, Brendan Roycroft

Proceedings Volume 11301, 113010H (2020) https://doi.org/10.1117/12.2548592

KEYWORDS: Silicon, Semiconducting wafers, Silicon photonics, Photonic integrated circuits, Waveguides, Semiconductor lasers, Printing, Etching, Photonics, Gold

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Proceedings Article | 19 July 2019 Paper

Automated heterodyne method to characterize semiconductor based akinetic swept laser sources

Carlos Reyes, Tomasz Piwonski, Brian Corbett, Brendan Roycroft

Proceedings Volume 11078, 110780X (2019) https://doi.org/10.1117/12.2526376

KEYWORDS: Optical coherence tomography, Tunable lasers, Frequency modulation, Heterodyning, Photodetectors, Semiconductors, Semiconductor lasers

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Proceedings Article | 21 November 2017 Open Access

A 10Gbps optical burst switching network incorporating ultra-fast (5ns) wavelength switched tunable laser sources

Neil Ryan, Michael Todd, Tom Farrell, Adrian Lavin, Pierre-Jean Rigole, Brian Corbett, Brendan Roycroft, Jan-Peter Engelstaedter

Proceedings Volume 10566, 1056616 (2017) https://doi.org/10.1117/12.2308209

KEYWORDS: Switching, Tunable lasers, Clocks, Laser applications, Switches, Reflectors, Modulation, Ultrafast phenomena, Transmitters, Channel projecting optics

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Proceedings Article | 10 May 2012 Paper

High index contrast optical platform using gallium phosphide on sapphire: an alternative to SOI?

Donagh O'Mahony, Md. Nazmul Hossain, John Justice, Emanuele Pelucchi, Alan O'Riordan, Brendan Roycroft, Brian Corbett

Proceedings Volume 8431, 84311H (2012) https://doi.org/10.1117/12.922687

KEYWORDS: Waveguides, Sapphire, Refractive index, Silicon, Indium gallium phosphide, Vertical cavity surface emitting lasers, Reflection, Gallium, Optical design, Quartz

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Proceedings Article | 12 February 2010 Paper

Quantum well intermixing in AlInGaAs MQW structures through impurity-free vacancy method

Ko-Hsin Lee, James O'Callaghan, Brendan Roycroft, Chris Daunt, Hua Yang, Jeong Hwan Song, Frank Peters, Brian Corbett

Proceedings Volume 7604, 76040J (2010) https://doi.org/10.1117/12.841329

KEYWORDS: Silica, Dielectrics, Quantum wells, Luminescence, Annealing, Electroluminescence, Diffusion, Photonic integrated circuits, Fabrication, Plasma enhanced chemical vapor deposition

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Proceedings Article | 6 February 2010 Paper

Dynamics of 1.55 µm Buried Tunnel Junction VCSELs under optical injection around threshold

Aidan Daly, Brendan Roycroft, Frank Peters, Markus Ortsiefer, Brian Corbett

Proceedings Volume 7615, 76150Q (2010) https://doi.org/10.1117/12.840668

KEYWORDS: Vertical cavity surface emitting lasers, Polarization, Tunable lasers, Laser damage threshold, Spectral resolution, Light, Distributed Bragg reflectors, Dielectrics, Reflectors

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SPIE Journal Paper | 1 January 2010

Experimental investigation of laser welding assembling sequences for butterfly laser module packages

Jeong Hwan Song, Brendan Roycroft, Brian Corbett, Frank Peters

OE, Vol. 49, Issue 01, 014301, (January 2010) https://doi.org/10.1117/12.10.1117/1.3286539

KEYWORDS: Laser welding, Metals, Fiber lasers, Nickel, Nd:YAG lasers, Laser processing, Semiconductor lasers, Nanolithography, Optical engineering, Fiber coupled lasers

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Proceedings Article | 26 September 2007 Paper

Enhanced efficiency of near-UV emitting LEDs for solid state lighting applications

D. Zhu, B. Corbett, B. Roycroft, P. Maaskant, C. McAleese, M. Akhter, M. Kappers, C. Humphreys

Proceedings Volume 6797, 67970O (2007) https://doi.org/10.1117/12.758799

KEYWORDS: Light emitting diodes, Quantum wells, Near ultraviolet, Gallium nitride, Mirrors, Sapphire, Metals, Reflectivity, Optical resonators, Solid state lighting

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Proceedings Article | 3 June 2005 Paper

The HomePlanet project: a HAVi multi-media network over POF

Brendan Roycroft, Brian Corbett, Carmel Kelleher, John Lambkin, Baudouin Bareel, Jacques Goudeau, Peter Skiczuk

Proceedings Volume 5825, (2005) https://doi.org/10.1117/12.605705

KEYWORDS: Phase only filters, Optical fibers, Standards development, Optical networks, Transceivers, Signal attenuation, Light emitting diodes, Vertical cavity surface emitting lasers, Video, Human-machine interfaces

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Proceedings Article | 2 June 2005 Paper

Compact sub-micron focused laser beam using integrated Bessel phase control

J. Justice, P. Lambkin, B. Roycroft, B. Corbett

Proceedings Volume 5824, (2005) https://doi.org/10.1117/12.605685

KEYWORDS: Vertical cavity surface emitting lasers, Diffraction gratings, Mirrors, Etching, Diffraction, Bessel beams, Ion beams, Near field, Diffractive optical elements, Beam propagation method

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Proceedings Article | 27 August 2003 Paper

Red and green resonant cavity LEDs for datacom applications

Brian Corbett, Brendan Roycroft, Alistair Phillips, Mahbub Akhter, Pleun Maaskant, John Lambkin, Thomas McCormack

Proceedings Volume 4876, (2003) https://doi.org/10.1117/12.463713

KEYWORDS: Phase only filters, Aluminum, Gallium, Metals, Standards development, Light emitting diodes, Quantum wells, Reflectivity, Mirrors, Fiber couplers

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Proceedings Article | 12 June 2002 Paper

Experimental and theoretical study of the frequency response of laterally coupled diode lasers

Rui Santos, Brendan Roycroft, Guillermo Carpintero, Horacio Lamela, Edeltraud Gehrig, Ortwin Hess

Proceedings Volume 4646, (2002) https://doi.org/10.1117/12.470542

KEYWORDS: Modulation, Semiconductor lasers, Data modeling, Instrument modeling, Optical communications, Optical simulations, Network security, Photodetectors, Laser resonators, Physics

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Proceedings Article | 12 June 2002 Paper

Considerations on the rate equation description of a twin stripe laser array

Guillermo Carpintero, Brendan Roycroft, Horacio Lamela, R. Lemos, Pablo Acedo

Proceedings Volume 4646, (2002) https://doi.org/10.1117/12.470538

KEYWORDS: Modulation, Instrument modeling, Data modeling, Physics, Optoelectronic devices, Blood, Wave propagation, Refractive index, Phase shift keying

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Proceedings Article | 12 June 2002 Paper

Modal properties of twin ridge laser diodes

Brendan Roycroft, Horacio Lamela, Guillermo Carpintero, Rui Santos, Markus Pessa

Proceedings Volume 4646, (2002) https://doi.org/10.1117/12.470537

KEYWORDS: Semiconductor lasers, Modulation, Near field, Lasers, CCD image sensors, Charge-coupled devices, Monochromators, CCD cameras, Near field optics, Visible radiation

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Proceedings Article | 9 July 2001 Paper

Experimental characterization and analysis of the static behavior of twin-ridge AlGaInAs laterally coupled lasers (LCDL)

Brendan Roycroft, Pekko Sipilae, Petri Melanen, Pekka Savolainen, Markus Pessa, Manuel Leones, Sara Perez, Guillermo Carpintero, Horacio Lamela

Proceedings Volume 4283, (2001) https://doi.org/10.1117/12.432579

KEYWORDS: Semiconductor lasers, Near field, Optoelectronics, Modulation, Quantum wells, Scanning electron microscopy, Resistance, Optical testing, Optoelectronic devices, Temperature metrology

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Proceedings Article | 24 May 1999 Paper

Dynamics of microcavity light emitters

Brendan Roycroft, Thomas Aherne, John Hegarty, Ingrid Moerman, Peter Van Daele, Roel Baets

Proceedings Volume 3611, (1999) https://doi.org/10.1117/12.349254

KEYWORDS: Optical microcavities, Light emitting diodes, Mirrors, Modulation, Quantum efficiency, External quantum efficiency, Telecommunications, Gallium arsenide, Gold, Packaging

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Showing 5 of 17 publications

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