Prof. Paul D. Townsend Profile

Prof. Paul D. Townsend

IPIC Director & Head of Photonics at Tyndall National Institute

SPIE Involvement:

Author

Proceedings Article | 13 March 2024 Presentation + Paper

Optical communication for next generation chip on tip surgical endoscopes

Asif Newaz Khan, Cleitus Antony, Meena Baskaran, Brian Corbett, Sanathana Konugolu Venkata Sekar, Ray Burke, Stefan Andersson-Engels, Paul Townsend

Proceedings Volume 12819, 128190G (2024) https://doi.org/10.1117/12.3002842

KEYWORDS: Power consumption, Signal attenuation, Modulation, Reflection, Receivers, Modulators, Quantum receivers, Optical communications, Transceivers, Cameras

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Proceedings Article | 8 March 2023 Presentation + Paper

Non-invasive continuous hypoxia assessment in intra-partum fetus through long wavelength near infrared spectroscopy

Shree Krishnamoorthy, Urbashi Basu, Kiangwei Kho, Rekha Gautam, Francesca Di Croce, Walter Messina, Cleitus Antony, Paul Townsend, Fergus McCarthy, Stefan Andersson-Engels, Ray Burke

Proceedings Volume 12428, 124280M (2023) https://doi.org/10.1117/12.2648375

KEYWORDS: Short wave infrared radiation, Hypoxia, Fetus, Near infrared spectroscopy, Spectroscopy, Monte Carlo methods, Reflectivity, Sensors, Reflectance spectroscopy, Photon transport, Near infrared

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Proceedings Article | 14 February 2019 Paper

Adaptively loaded offset-QAM OFDM based on set-partitioned QAM in IMDD systems

Jian Zhao, Fei Ji, Paul Townsend

Proceedings Volume 11048, 1104802 (2019) https://doi.org/10.1117/12.2524852

KEYWORDS: Orthogonal frequency division multiplexing, Signal to noise ratio, Quadrature amplitude modulation, Signal detection, Single mode fibers, Modulation, Signal processing

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Proceedings Article | 18 February 2011 Paper

Gigahertz quantum cryptography

Gerald Buller, Robert Collins, Patrick Clarke, Paul Townsend

Proceedings Volume 7988, 79881R (2011) https://doi.org/10.1117/12.888242

KEYWORDS: Quantum key distribution, Sensors, Photons, Optical fibers, Silicon, Quantum communications, Avalanche photodiodes, Polarization, Information security, Computer programming

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Proceedings Article | 10 September 2007 Paper

Gigahertz-clocked quantum key distribution in passive optical networks

Veronica Fernandez, Robert Collins, Karen Gordon, Paul Townsend, Gerald Buller

Proceedings Volume 6780, 678004 (2007) https://doi.org/10.1117/12.732476

KEYWORDS: Quantum key distribution, Receivers, Clocks, Photons, Networks, Network architectures, Standards development, Telecommunications, Passive optical networks, Transmitters

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Proceedings Article | 3 November 2006 Paper

Application of a new time-correlated single photon counting instrument in a fiber-based quantum cryptography system

Iris P. S. Choi, Harendra N. J. Fernando, Paul Townsend, Michael Wahl

Proceedings Volume 6372, 637210 (2006) https://doi.org/10.1117/12.686152

KEYWORDS: Quantum key distribution, Sensors, Coarse wavelength division multiplexing, Phase shifts, Data modeling, Single photon, Quantum cryptography, Raman scattering, Picosecond phenomena, Data acquisition

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Proceedings Article | 7 July 2005 Paper

Quantum key distribution in a multi-user network at gigahertz clock rates

Veronica Fernandez, Karen Gordon, Robert Collins, Paul Townsend, Sergio Cova, Ivan Rech, Gerald Buller

Proceedings Volume 5840, (2005) https://doi.org/10.1117/12.608650

KEYWORDS: Quantum key distribution, Clocks, Photons, Standards development, Vertical cavity surface emitting lasers, Polarization, Sensors, Telecommunications, Optical fibers, Single photon detectors

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Proceedings Article | 3 June 2005 Paper

100km reach DWDM SuperPON with upstream bit rates of 2.5Gb/s and 10Gb/s

Giuseppe Talli, Paul Townsend

Proceedings Volume 5825, (2005) https://doi.org/10.1117/12.606596

KEYWORDS: Dense wavelength division multiplexing, Optical amplifiers, Modulators, Receivers, Head, Modulation, Transmitters, Fiber amplifiers, Optical networks, Amplifiers

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Proceedings Article | 6 July 1998 Paper

Quantum cryptography on optical fiber networks

Paul Townsend

Proceedings Volume 3385, (1998) https://doi.org/10.1117/12.312632

KEYWORDS: Quantum cryptography, Sensors, Receivers, Single photon, Quantum key distribution, Optical fibers, Polarization, Interferometers, Interferometry, Quantum communications

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Showing 5 of 9 publications

Conference Committee Involvement (1)

Optical Networks: Systems and Devices

6 April 2005 | Dublin, Ireland

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