Prof. Ian H. White Profile

Prof. Ian H. White

at Univ of Cambridge

SPIE Involvement:

Conference Program Committee | Author

Publications (76)

Proceedings Article | 5 March 2021 Presentation + Paper

Single-lane >100 Gb/s CAP-based data transmission over VCSEL-MMF links using low-complexity equalization

N. Bamiedakis, X. Dong, D. Cunningham, I. White, R. Penty

Proceedings Volume 11712, 117120L (2021) https://doi.org/10.1117/12.2578286

KEYWORDS: Data transmission, Telecommunications, Phase shift keying, Optical components, Optical communications, Modulation, Data storage, Data communications, Data centers, Amplitude modulation

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Proceedings Article | 9 March 2020 Presentation

Scaling of port count for InP-based switches for data centre applications (Conference Presentation)

Richard Penty, Adrian Wonfor, Ian White

Proceedings Volume 11308, 1130803 (2020) https://doi.org/10.1117/12.2544374

KEYWORDS: Switches, Data centers, Photonic integrated circuits, Optical switching, Switching, Optical data conversion, Integrated circuit design, Device simulation

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Proceedings Article | 2 March 2020 Presentation + Paper

Impact of dislocations in monolithic III-V lasers on silicon: a theoretical approach

Constanze Hantschmann, Zizhuo Liu, Mingchu Tang, Alwyn Seeds, Huiyun Liu, Ian White, Richard Penty

Proceedings Volume 11274, 112740J (2020) https://doi.org/10.1117/12.2547327

KEYWORDS: Quantum wells, Semiconductor lasers, Silicon, Diffusion, Optical simulations, Spatial resolution, Quantum dots, Group III-V semiconductors, Silicon photonics

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Proceedings Article | 28 February 2020 Presentation + Paper

Bending loss improvement and twisting loss studies of flexible multimode polymer waveguides

F. Shi, N. Bamiedakis, R. V. Penty, I. H. White, D. Chu

Proceedings Volume 11286, 112860K (2020) https://doi.org/10.1117/12.2546552

KEYWORDS: Waveguides, Polymer multimode waveguides, Polymers, Cladding, Optical interconnects, Vertical cavity surface emitting lasers, Near field, Sensors, Refractive index, Electrical engineering

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Proceedings Article | 4 March 2019 Paper

Mode-mixing in multimode polymer waveguides for on-board optical interconnects

N. Bamiedakis, F. Shi, D. Chu, R. Penty, I. White

Proceedings Volume 10924, 1092404 (2019) https://doi.org/10.1117/12.2510275

KEYWORDS: Waveguides, Polymer multimode waveguides, Polymers, Optical interconnects, Surface roughness, Geometrical optics

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Proceedings Article | 4 March 2019 Presentation + Paper

Erbium-doped polymer waveguide amplifiers for PCB-integrated optical links

Marcin Ziarko, Nikos Bamiedakis, Eric Kumi-Barimah, Gin Jose, Richard Penty, Ian White

Proceedings Volume 10924, 1092403 (2019) https://doi.org/10.1117/12.2509983

KEYWORDS: Waveguides, Polymers, Optical amplifiers, Erbium, Glasses

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Proceedings Article | 20 March 2018 Presentation

Field trial of a QKD and high-speed classical data hybrid metropolitan network (Conference Presentation)

Adrian Wonfor, Han Qin, Rupesh Kumar, Xinke Tang, James Dynes, Andrew Shields, Richard Penty, Ian White

Proceedings Volume 10559, 1055907 (2018) https://doi.org/10.1117/12.2290544

KEYWORDS: Quantum key distribution, Quantum communications, Signal attenuation, Single photon, Data communications, Telecommunications, Quantum networks, Multiplexing

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Proceedings Article | 23 February 2018 Presentation + Paper

High-aggregate-capacity visible light communication links using stacked multimode polymer waveguides and micro-pixelated LED arrays

N. Bamiedakis, J. J. McKendry, E. Xie, E. Gu, M. Dawson, R. Penty, I. White

Proceedings Volume 10535, 105351N (2018) https://doi.org/10.1117/12.2290755

KEYWORDS: Waveguides, Light emitting diodes, Polymer multimode waveguides, Polymers, Visible radiation, Organic light emitting diodes, Free space optics, Optical interconnects, Interfaces, System integration

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Proceedings Article | 22 February 2018 Paper

Flexible multimode polymer waveguides for high-speed short-reach communication links

N. Bamiedakis, F. Shi, D. Chu, R. Penty, I. White

Proceedings Volume 10538, 105380N (2018) https://doi.org/10.1117/12.2289737

KEYWORDS: Waveguides, Polymers, Polymer multimode waveguides, Data transmission, Single mode fibers, Vertical cavity surface emitting lasers, Electronics, Optical interconnects, Telecommunications, Near field

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Proceedings Article | 21 November 2017 Open Access

Multimode polymer waveguides for high-speed optical interconnects

N. Bamiedakis, J. Ingham, R. Penty, I. White, J. DeGroot, T. Clapp

Proceedings Volume 10567, 105673W (2017) https://doi.org/10.1117/12.2308178

KEYWORDS: Waveguides, Polymers, Polymer multimode waveguides, Optical interconnects, Tolerancing, Signal attenuation, Optics manufacturing, Temperature metrology, Eye, Laser sources

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Proceedings Article | 15 March 2016 Paper

High-bandwidth and low-loss multimode polymer waveguides and waveguide components for high-speed board-level optical interconnects

N. Bamiedakis, J. Chen, R. Penty, I. White

Proceedings Volume 9753, 975304 (2016) https://doi.org/10.1117/12.2212546

KEYWORDS: Waveguides, Optical interconnects, Polymer multimode waveguides, Refractive index, Polymers, Optoelectronics, Electro optic polymers, Optical properties, Standards development, Electronics, Single mode fibers, Tolerancing, Dispersion, Transmittance, Vertical cavity surface emitting lasers

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SPIE Journal Paper | 6 March 2014 Open Access

Glass–polymer superlattice for integrated optics

Tarun Kakkar, Nicholas Bamiedakis, Toney Teddy-Fernandez, Zhanxiang Zhao, Mehrdad Irannejad, David Steenson, Animesh Jha, Richard Penty, Ian White, Gin Jose

OE, Vol. 53, Issue 07, 071818, (March 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.7.071818

KEYWORDS: Glasses, Polymers, Superlattices, Europium, Ions, Erbium, Sensors, Integrated optics, Waveguides, Polymeric sensors

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Proceedings Article | 21 February 2011 Paper

Analogue modulation performance of 20 GHz vertical cavity surface emitting lasers for radio over fiber applications

M. Crisp, Z. Qureshi, J. Ingham, R. Penty, I. White, N. Ledentsov, J. Lott

Proceedings Volume 7933, 79331D (2011) https://doi.org/10.1117/12.877361

KEYWORDS: Vertical cavity surface emitting lasers, Modulation, Hybrid fiber radio, Analog modulation, Oxides, Radio over Fiber, Electro optics, Radio optics, Refractive index, Data communications

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Proceedings Article | 17 February 2011 Paper

Very high modulation efficiency two-sections tapered laser diode at 1060nm for free space optical communications

M. Ruiz, N. Michel, M. Calligaro, Y. Robert, M. Lecomte, O. Parillaud, M. Krakowski, I. Esquivias, H. Odriozola, J. M. G. Tijero, C. H. Kwok, R. Penty, I. White

Proceedings Volume 7953, 79531C (2011) https://doi.org/10.1117/12.873560

KEYWORDS: Modulation, Continuous wave operation, Semiconductor lasers, Laser vision correction, High power lasers, Eye, Reflectivity, Near field, Internal quantum efficiency, Optical simulations

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Proceedings Article | 23 February 2010 Paper

Optical transceiver integrated on PCB using electro-optic connectors compatible with pick-and-place assembly technology

Nikolaos Bamiedakis, Joseph Beals, Aeffendi Hashim, Richard Penty, Ian White

Proceedings Volume 7607, 76070O (2010) https://doi.org/10.1117/12.844871

KEYWORDS: Connectors, Waveguides, Vertical cavity surface emitting lasers, Transceivers, Polymers, Photodiodes, Active optics, Integrated optics, Optics manufacturing, Tolerancing

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Proceedings Article | 12 February 2010 Paper

Two-sections tapered diode lasers for 1 Gbps free-space optical communications with high modulation efficiency

N. Michel, M. Ruiz, M. Calligaro, Y. Robert, M. Lecomte, O. Parillaud, M. Krakowski, I. Esquivias, H. Odriozala, J. M. G. Tijero, C. H. Kwok, R. V. Penty, I. H. White

Proceedings Volume 7616, 76161F (2010) https://doi.org/10.1117/12.840702

KEYWORDS: Modulation, Continuous wave operation, Semiconductor lasers, Laser vision correction, Eye, Reflectivity, Free space optical communications, Near field, High power lasers, Optical simulations

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Proceedings Article | 12 February 2009 Paper

Multimode siloxane polymer components for optical interconnects

Nikolaos Bamiedakis, Joseph Beals, Richard Penty, Ian White, Jon DeGroot, Terry Clapp, David De Shazer

Proceedings Volume 7221, 72210J (2009) https://doi.org/10.1117/12.807713

KEYWORDS: Waveguides, Polymers, Single mode fibers, Optical interconnects, Polymer multimode waveguides, Tolerancing, Particle filters, Transmittance, Cladding, Antennas

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Proceedings Article | 3 February 2009 Paper

High-brightness tapered lasers with an Al-free active region at 1060 nm

M. Ruiz, H. Odriozola, C. H. Kwok, N. Michel, M. Calligaro, M. Lecomte, O. Parillaud, M. Krakowski, J. M. G. Tijero, I. Esquivias, R. V. Penty, I. H. White

Proceedings Volume 7230, 72301D (2009) https://doi.org/10.1117/12.808427

KEYWORDS: Modulation, Continuous wave operation, Electrodes, Semiconductor lasers, High power lasers, Internal quantum efficiency, Transparency, Waveguides, Near field, Free space optical communications

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Proceedings Article | 19 November 2008 Paper

Multimode fibers with asymmetric impulse response for an improved Shannon capacity

C. Kwok, David Cunningham, Ian White

Proceedings Volume 7137, 71371K (2008) https://doi.org/10.1117/12.803673

KEYWORDS: Signal to noise ratio, Transmitters, Receivers, Connectors, Multimode fibers, Signal detection, Channel projecting optics, Interference (communication), Standards development, Statistical modeling

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Proceedings Article | 18 November 2008 Paper

Twin-contact high brightness tapered laser for high modulation efficiency high speed signal modulation

C. Kwok, Richard Penty, Ian White, K.-H. Hasler, B. Sumpf, G. Erbert

Proceedings Volume 7135, 71351V (2008) https://doi.org/10.1117/12.803674

KEYWORDS: Modulation, Electrodes, Transmitters, Receivers, Telecommunications, Continuous wave operation, Free space optics, Wireless communications, Data communications

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Proceedings Article | 11 November 2008 Paper

NRZ-DPSK to RZ-BPSK all-optical format conversion using optical filter and SOA-MZI

Y. Yu, X. Zhang, J. B. Rosas-Fernández, D. Huang, R. V. Penty, I. H. White

Proceedings Volume 7136, 71362Y (2008) https://doi.org/10.1117/12.804020

KEYWORDS: Clocks, Fiber lasers, Optical filters, Phase shift keying, Modulation, Phase modulation, Chromium, Demodulation, Wavelength division multiplexing, Eye

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Proceedings Article | 11 November 2008 Paper

16 DWDM channels optoelectronic 3R NRZ-to-RZ regenerative format conversions based on single phase modulator

Y. Yu, J. B. Rosas-Fernández, X. Zhang, D. Huang, R. V. Penty, I. H. White

Proceedings Volume 7136, 71360Q (2008) https://doi.org/10.1117/12.804019

KEYWORDS: Phase modulation, Dense wavelength division multiplexing, Optoelectronics, Modulators, Clocks, Single mode fibers, Signal processing, Eye, Tolerancing, Wavelength division multiplexing networks

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Proceedings Article | 11 November 2008 Paper

Design of multimode interference coupled polymer rectangular ring resonators with air trench assisted mirrors

Xiaobei Zhang, N. Bamiedakis, J. Beals, R. Penty, I. White, Xinliang Zhang, Dexiu Huang

Proceedings Volume 7134, 71340S (2008) https://doi.org/10.1117/12.803481

KEYWORDS: Resonators, Brain-machine interfaces, Mirrors, Polymers, 3D modeling, Waveguides, Finite-difference time-domain method, Radio propagation, Scattering, Polymer multimode waveguides

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Proceedings Article | 31 January 2008 Paper

Low-noise monolithic mode-locked semiconductor lasers through low-dimensional structures

Kresten Yvind, David Larsson, Jesper Mørk, Jørn Hvam, Mark Thompson, Richard Penty, Ian White

Proceedings Volume 6909, 69090A (2008) https://doi.org/10.1117/12.768641

KEYWORDS: Quantum wells, Mode locking, Quantum dots, Semiconductor lasers, Modulation, Picosecond phenomena, Pulsed laser operation, Continuous wave operation, Zinc

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Proceedings Article | 29 January 2008 Paper

Monolithic mode-locked quantum dot lasers

R. Penty, M. Thompson, I. White

Proceedings Volume 6909, 690909 (2008) https://doi.org/10.1117/12.768247

KEYWORDS: Mode locking, Quantum dot lasers, Quantum dots, Waveguides, Semiconductor lasers, Etching, Quantum wells, Gallium arsenide, Picosecond phenomena, Pulsed laser operation

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Proceedings Article | 21 November 2007 Paper

Modal noise investigation in multimode polymer waveguides

Joseph Beals, Nikos Bamiedakis, Richard Penty, Ian White, Jon DeGroot, Terry Clapp

Proceedings Volume 6781, 67810Q (2007) https://doi.org/10.1117/12.744806

KEYWORDS: Waveguides, Vertical cavity surface emitting lasers, Polymer multimode waveguides, Polymers, Speckle pattern, Multimode fibers, Waveguide modes, Standards development, Optical fibers, Receivers

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Proceedings Article | 19 November 2007 Paper

Low-cost multimode fiber gigabit Ethernet using Manchester encoded signal for an improved transmission performance

C. Kwok, Richard Penty, Ian White

Proceedings Volume 6783, 67830K (2007) https://doi.org/10.1117/12.744653

KEYWORDS: Multimode fibers, Signal detection, Interference (communication), Receivers, Modulation, Computer programming, Clocks, Logic, Eye, Binary data

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Proceedings Article | 7 November 2007 Paper

A novel wavelength division multiplexed system architecture for high resolution sampling and digitisation of broadband microwave signals

John Heaton, Pisu Jiang, Damian Gotch, Richard Fawley, Yi Zhou, Stephen Clements, Ian White, Richard Lang

Proceedings Volume 6739, 67390M (2007) https://doi.org/10.1117/12.740706

KEYWORDS: Modulators, Pulse generators, Electrooptic modulators, Photodetectors, Pulsed laser operation, Electrodes, Fiber Bragg gratings, Microwave radiation, Electro optics, Multiplexing

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Proceedings Article | 10 October 2006 Paper

Focused-ion-beam post-processing technology for active devices

Chyng Wen Tee, Fat Kit Lau, Xin Zhao, Richard Penty, Ian White

Proceedings Volume 6352, 635210 (2006) https://doi.org/10.1117/12.691640

KEYWORDS: Etching, Waveguides, Vertical cavity surface emitting lasers, Photonic crystals, Polarization, Ion beams, Mirrors, Reflectors, Profiling, Ions

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Proceedings Article | 2 October 2006 Paper

Investigation of 40Gb/s WDM multi-casting using a hybrid integrated Mach-Zehnder interferometer

Dimitri Reading-Picopoulos, Richard Penty, Ian White

Proceedings Volume 6388, 63880O (2006) https://doi.org/10.1117/12.686012

KEYWORDS: Wavelength division multiplexing, Switching, Mach-Zehnder interferometers, Transparency, Semiconductor optical amplifiers, Nonlinear optics, Computer simulations, Optical amplifiers, Data modeling

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Proceedings Article | 28 September 2006 Paper

High capacity interconnection networks

Madeleine Glick, Michael Dales, Tao Lin, E. Aw, Adrian Wonfor, Kevin Williams, Richard Penty, Ian White

Proceedings Volume 6354, 63542F (2006) https://doi.org/10.1117/12.691289

KEYWORDS: Switches, Optical switching, Networks, Control systems, Interfaces, Switching, Field programmable gate arrays, Optical interconnects, Calibration, Network architectures

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Proceedings Article | 20 April 2006 Paper

Optimal design parameters research for novel monolithically integrated non-linear all-optical loop mirror for signal regeneration

E. Moll, K. Williams, R. Penty, I. White

Proceedings Volume 6183, 618318 (2006) https://doi.org/10.1117/12.662977

KEYWORDS: Mirrors, Waveguides, Quantum wells, Reflectivity, Nonlinear optics, Remote sensing, Optics manufacturing, Phase shifts, Computer simulations, Refractive index

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We propose a device based on self-induced phase shifting to create a non-linear optical transfer function with a single optical access. The device is designed around the Nonlinear-Optical Loop Mirror (NOLM) principle. The device is a loop formed by four SOAs with a splitter/recombiner at one of the junctions for optical access. The device also includes a mirror inside one of the SOAs such that part of the light is transmitted around the loop and part is reflected. The dimensions of formed loop are kept below 4mm (1mm/SOA) to the requirement for integration. It is assumed the loop is based on a standard ridge waveguide design with InGaAsP/InGaAs quantum wells yielding a refractive index of 3.88. Also, the width of the waveguide is kept constant at 2μm to ensure single-moded operation. We present simulations results obtained with VPITransmissionMakerTM from VPIPhotonics. The software allows the simulation of optical modules such as Lasers, SOAs, Bragg Grating. The SOA and Laser modules exploit on the Transmission Line Laser Model (TLLM) model for solving the standard laser rate equations. For the Multi-Quantum Wells (MQW) SOAs, another set of equations are used to model the effects of carriers entering and exiting the quantum wells. The model is used to explore the tunability of the design and manufacturing parameters for optimal performance of the non-linear optical loop mirror. Design parameters include the size of the loop, drive current of each SOA, position and reflectivity of the mirror, number and size of the quantum wells and separate confinement height. To provide an efficient way of comparing different values for a given parameter, three figures of merits are chosen. The first one is the input dynamic range of the device in its current configuration, which corresponds to the area of the transfer function where the input signal will experience regeneration. The second parameter is the peak to trough ratio corresponding to the maximum possible output swing i.e. the maximum point of the transfer function less its corresponding minima. The final parameter named the regeneration slope is the division of the peak to trough ration by the input dynamic range. The particularity of this loop is the mirror etched into one of the active waveguides to create self-induced phase shifts leading to non-linear transfer functions with a single optical input. Optimisation is explored for various design parameters that would need to be decided prior to manufacturing such a device. It is believed that such optimisation can provide a way to create all-optical signal processing devices created for a single application.

Proceedings Article | 17 April 2006 Paper

Compact and efficient femtosecond lasers

Tom Brown, Alexander Lagatsky, C. Leburn, Alan McWilliam, Abdul Sarmani, Maria Ana Cataluna, Ben Agate, Kishan Dholakia, David Stevenson, Wilson Sibbett, Yewjun Chai, Pisu Jiang, Kim Tan, Richard Penty, Ian White, Edik Rafailov, N. Kuleshov

Proceedings Volume 6190, 61900S (2006) https://doi.org/10.1117/12.668259

KEYWORDS: Femtosecond phenomena, Semiconductor lasers, Crystals, Pulsed laser operation, Laser crystals, Mode locking, Mirrors, Semiconductors, Laser development, Ultrafast phenomena

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Proceedings Article | 14 April 2006 Paper

Reduced risk of catastrophic optical mirror damage in high power tapered lasers using intracavity diverging lens

Chyng Wen Tee, Fat Kit Lau, Xin Zhao, Richard Penty, Ian White, Michel Calligaro, Michel Lecomte, Olivier Parillaud, Nicolas Michel, Michel Krakowski

Proceedings Volume 6184, 61840P (2006) https://doi.org/10.1117/12.662653

KEYWORDS: Etching, Thermal effects, Near field optics, Mirrors, High power lasers, Waveguides, Geometrical optics, Semiconductor lasers, Laser processing, Diffraction

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Proceedings Article | 14 April 2006 Paper

IPDR improvement and gain reduction in a beam holding SOA

Jinyong Ha, Kevin Williams, Richard Penty, Ian White, Madeleine Glick

Proceedings Volume 6184, 61840Q (2006) https://doi.org/10.1117/12.662875

KEYWORDS: Distortion, Switching, Optical amplifiers, Semiconductor optical amplifiers, Semiconductor lasers, Phase modulation, Carrier dynamics, Integrated optics, Packet switching, Polarization

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Proceedings Article | 14 April 2006 Paper

Absorber length optimisation for sub-picosecond pulse generation in passively mode-locked 1.3μm quantum dot laser diodes

A. Rae, M. Thompson, R. Penty, I. White, A. Kovsh, S. Mikhrin, D. Livshits, I. Krestnikov

Proceedings Volume 6184, 61841F (2006) https://doi.org/10.1117/12.662892

KEYWORDS: Mode locking, Semiconductor lasers, Quantum dot lasers, Picosecond phenomena, Pulsed laser operation, Single mode fibers, Diodes, Quantum dots, Second-harmonic generation, Telecommunications

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Proceedings Article | 1 March 2006 Paper

A novel monolithic beam steering high power transmitter for low cost free space optical wireless links

Fat Kit Lau, Xin Zhao, Chyng Wen Tee, Richard Penty, Ian White, Michel Calligaro, Michel Lecomte, Olivier Parillaud, Nicolas Michel, Michel Krakowski

Proceedings Volume 6105, 61050H (2006) https://doi.org/10.1117/12.648058

KEYWORDS: Free space optics, Transmitters, Beam steering, Free space, Etching, Near field, Metals, Near field optics, Resistance, Ion beams

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Proceedings Article | 28 February 2006 Paper

Investigation of single-photon propagation velocity in optical fiber

J. Ingham, J. Carroll, I. White

Proceedings Volume 6115, 61150V (2006) https://doi.org/10.1117/12.646343

KEYWORDS: Photons, Single mode fibers, Attenuators, Optical fibers, Single photon detectors, Single photon, Dispersion, Vertical cavity surface emitting lasers, Oscilloscopes, Oscillators

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Proceedings Article | 15 February 2006 Paper

Monolithic integration of collimating Fresnel lens for beam quality enhancement in tapered high power laser diode

Fat Kit Lau, Chyng Wen Tee, Xin Zhao, Kevin Williams, Richard Penty, Ian White, Michel Calligaro, Michel Lecomte, Olivier Parillaud, Nicolas Michel, Michel Krakowski

Proceedings Volume 6104, 61040L (2006) https://doi.org/10.1117/12.648047

KEYWORDS: Semiconductor lasers, Etching, Near field, Laser resonators, Fresnel lenses, High power lasers, Diodes, Lens design, Near field optics, Monochromatic aberrations

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Proceedings Article | 4 April 2005 Paper

26dB optical gain in a rib waveguide dye-doped polymer amplifier operating at 625 nm

Mark Reilly, Miguel Ramon, Claudio Marinelli, Christopher Morgan, Marilu Ariu, Ruidong Xia, Richard Penty, Ian White, Donal Bradley

Proceedings Volume 5724, (2005) https://doi.org/10.1117/12.590359

KEYWORDS: Waveguides, Polymers, Optical amplifiers, Polymer multimode waveguides, Signal to noise ratio, Polymethylmethacrylate, Absorption, Rhodamine, Silica, Polymer optical fibers

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Proceedings Article | 4 April 2005 Paper

Optimization of twin-contact semiconductor optical amplifiers for use in integrated interferometric devices

Emmanuel Moll, Yew Jun Chai, Kevin Williams, Richard Penty, Ian White

Proceedings Volume 5723, (2005) https://doi.org/10.1117/12.593279

KEYWORDS: Phase shifts, Interferometry, Semiconductor optical amplifiers, Switching, Optical amplifiers, Optics manufacturing, Instrument modeling, Systems modeling, Integrated optics, Optical components

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Proceedings Article | 25 October 2004 Paper

Novel single-mode laser operation using 2D photonic crystal

Xin Zhao, Kevin Williams, Peter Bennett, Y. Chu, Richard Penty, Ian White, Yi-Xiong Lin, Yu-Chen Yu, Y. Huang, Dae-Joon Kang, Mark Blamire

Proceedings Volume 5595, (2004) https://doi.org/10.1117/12.581379

KEYWORDS: Photonic crystals, Etching, Semiconductor lasers, Waveguides, Diffraction gratings, Refractive index, Fabry–Perot interferometers, Diffraction, Reflectivity, 3D modeling

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Proceedings Article | 1 September 2004 Paper

Uncooled 40Gb/s 4-level directly modulated laser source for datacoms applications

Adrian Wonfor, Richard Penty, Ian White, Kenton White, Anthony Kelly, Craig Tombling

Proceedings Volume 5452, (2004) https://doi.org/10.1117/12.545710

KEYWORDS: Modulation, Data communications, Receivers, Semiconductor lasers, Eye, Laser sources, Signal attenuation, Laser applications, Semiconductor optical amplifiers, Signal detection

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Proceedings Article | 1 September 2004 Paper

Mode locking of InGaAs quantum dot lasers

Mark Thompson, Kay Tan, Claudio Marinelli, Kevin Williams, Roman Sellin, Richard Penty, Ian White, Matthias Kuntz, Dongxun Ouyang, Ilia Kaiander, Nikolai Ledentsov, Dieter Bimberg, Victor Ustinov, Alexey Zhukov, Alexey Kovsh, Franz Visinka, Stephan Jochum, Stephan Hansmann, Dae-Joon Kang, Mark Blamire

Proceedings Volume 5452, (2004) https://doi.org/10.1117/12.545749

KEYWORDS: Mode locking, Oscilloscopes, Pulsed laser operation, Semiconductor lasers, Etching, Gallium, Quantum dot lasers, Quantum dots, Waveguides, Fourier transforms

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Proceedings Article | 18 August 2004 Paper

Multiwavelength optical add-drop multiplexer with nanosecond reconfiguration times for local area networking

Guy Roberts, Kevin Williams, Jeremy Sosabowski, Richard Penty, Ian White, Madeleine Glick, Derek McAuley

Proceedings Volume 5451, (2004) https://doi.org/10.1117/12.545689

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Proceedings Article | 9 July 2004 Paper

Novel polarization selector based on an active waveguide photonic bandgap structure

Christopher Morgan, Mark Silver, Kevin Williams, Antonios Atlasis, Peter Bennett, Xin Zhao, Richard Penty, Ian White

Proceedings Volume 5360, (2004) https://doi.org/10.1117/12.530700

KEYWORDS: Polarization, Waveguides, Photonic crystals, Crystals, Reflectivity, Photon polarization, Photonic crystal devices, Etching, Ion beams, Laser crystals

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Proceedings Article | 12 May 2004 Paper

Novel athermal WDM laser with polymer grating

Gefan Huang, Siyuan Yu, Aeneas Massara, Peter Heard, Richard Penty, Ian White

Proceedings Volume 5280, (2004) https://doi.org/10.1117/12.520548

KEYWORDS: Polymers, Wavelength division multiplexing, Waveguides, Semiconductor lasers, Fiber lasers, Etching, Semiconductors, Packaging, Laser development, Laser applications

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Proceedings Article | 11 May 2004 Paper

Mode-locked quantum dot lasers for picosecond pulse generation

Mark Thompson, Kay Ti Tan, Claudio Marinelli, Kevin Williams, Roman Sellin, Richard Penty, Ian White, Matthias Kuntz, Matthias Laemmlin, Dongxun Ouyang, Ilia Kaiander, Nikolai Ledentsov, Dieter Bimberg, V. Ustinov, A. Zhukov, A. Kovsh, Franz Visinka, Stephan Jochum, Stephan Hansmann, Dae-Joon Kang, Mark Blamire

Proceedings Volume 5365, (2004) https://doi.org/10.1117/12.531284

KEYWORDS: Mode locking, Quantum dot lasers, Pulsed laser operation, Etching, Picosecond phenomena, Oscilloscopes, Semiconductor lasers, Quantum dots, Gallium, Spectrum analysis

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Proceedings Article | 11 May 2004 Paper

High-power ultra-fast single- and multi-mode quantum dot lasers with superior beam profile

Roman Sellin, Dieter Bimberg, Victor Ustinov, Nikolai Ledentsov, Ilia Kaiander, Matthias Kuntz, Matthias Lämmlin, Kay Tan, Claudio Marinelli, Mark Thompson, Adrian Wonfor, Richard Penty, Ian White, David O'Brien, Stephan Hegarty, Guillaume Huyet, John McInerney, J. Kenton White

Proceedings Volume 5365, (2004) https://doi.org/10.1117/12.528296

KEYWORDS: Quantum wells, Semiconductor lasers, Gallium arsenide, Mode locking, Waveguides, Gallium, Modulation, Laser damage threshold, Cladding, Diodes

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Proceedings Article | 6 February 2004 Paper

High-dynamic-range linear analog data links (1-20 GHz) using room temperature DFB laser diodes

Ian White, Peter Hartmann, Jonathan Ingham, Matthew Webster, David Wake, Adrian Wonfor, Richard Penty, Alwyn Seeds, J. Kenton White

Proceedings Volume 5210, (2004) https://doi.org/10.1117/12.516114

KEYWORDS: Semiconductor lasers, Single mode fibers, Modulation, Temperature metrology, Standards development, Antennas, Signal to noise ratio, Distortion, Laser packaging, Intermodulation

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Proceedings Article | 8 December 2003 Paper

Optical local area networking using CWDM

Ian White, Richard Penty, Judith Hankey, Kevin Williams, G. Roberts, M. Glick, D. McAuley

Proceedings Volume 5248, (2003) https://doi.org/10.1117/12.514661

KEYWORDS: Coarse wavelength division multiplexing, Wavelength division multiplexing, Networks, Local area networks, Switches, Standards development, Switching, Telecommunications, Control systems, Waveguides

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SPIE Journal Paper | 1 March 2003

Tapered waveguide with parabolic lens: theory and experiment

Atef Rashed, Kevin Williams, Peter Heard, Richard Penty, Ian White

OE, Vol. 42, Issue 03, (March 2003) https://doi.org/10.1117/12.10.1117/1.1541621

KEYWORDS: Waveguides, Etching, Near field, Refractive index, Semiconductor lasers, Lens design, Wave propagation, Diodes, Waveguide lasers, Near field optics

Proceedings Article | 27 December 2001 Paper

Scanning electron and atomic force microscopy measurements of ion beam etched InP samples using Ar/H2 chemistry

Bulent Cakmak, Richard Penty, Ian White

Proceedings Volume 4451, (2001) https://doi.org/10.1117/12.453629

KEYWORDS: Etching, Ions, Ion beams, Argon, Scanning electron microscopy, Surface roughness, Anisotropy, Atomic force microscopy, Distributed interactive simulations, Chemistry

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Proceedings Article | 9 July 2001 Paper

Finite difference beam propagation model for tapered waveguide with intracavity lens

Atef Rashed, Kevin Williams, Richard Penty, Ian White

Proceedings Volume 4283, (2001) https://doi.org/10.1117/12.432613

KEYWORDS: Waveguides, Wave propagation, Refractive index, High power lasers, Waveguide modes, Optical simulations, Near field, Waveguide lasers, Beam propagation method, Near field optics

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Proceedings Article | 9 July 2001 Paper

Temperature dependence of threshold current: a better criterion than T0?

Tim Houle, Alexander Onischenko, Judy Rorison, Richard Penty, Ian White, Anthony SpringThorpe, J. Kenton White, Paul Paddon, T. Garanzotis

Proceedings Volume 4283, (2001) https://doi.org/10.1117/12.432571

KEYWORDS: Temperature metrology, Semiconductor lasers, Laser damage threshold, Measurement devices, Phonons, Gallium arsenide, Modeling, Computing systems, Waveguides, Semiconducting wafers

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Proceedings Article | 6 June 2001 Paper

Enhanced-performance operation of InGaN MQW lasers with air/nitride-distributed Bragg reflector defined by focused ion beam etching

Claudio Marinelli, Laurence Sargent, Michal Bordovsky, Adrian Wonfor, Judy Rorison, Richard Penty, Ian White, Peter Heard, Ghulam Hasnain, Richard Schneider

Proceedings Volume 4287, (2001) https://doi.org/10.1117/12.429784

KEYWORDS: Etching, Reflectivity, Near field, Mirrors, Fiber Bragg gratings, Diffraction gratings, Diffraction, Mirror structures, Solids, Indium gallium nitride

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Proceedings Article | 6 June 2001 Paper

Requirements for uncooled direct laser modulation at 10 Gb/s

Kevin Williams, Richard Penty, Ian White, Mark Silver

Proceedings Volume 4287, (2001) https://doi.org/10.1117/12.429792

KEYWORDS: Modulation, Eye, Semiconductor lasers, Optical simulations, Picosecond phenomena, Laser development, Transmitters, Receivers, Hole burning spectroscopy, Optical filters

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Proceedings Article | 20 April 2001 Paper

Ultrafast all-optical regeneration using a simple SOA/DFB laser device

Vishal Saxena, Kevin Williams, Richard Penty, Ian White

Proceedings Volume 4289, (2001) https://doi.org/10.1117/12.424819

KEYWORDS: Signal attenuation, Optical amplifiers, Ultrafast phenomena, Eye, Fiber lasers, Switching, Bandpass filters, Polarization, Wavelength division multiplexing, Telecommunications

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Proceedings Article | 14 July 2000 Paper

Analysis of the mechanisms for impaired high-temperature high-speed performance of 1.3-um InGaAsP lasers

Aeneas Massara, Kevin Williams, Jennifer Yong, Alexander Onischenko, Judy Rorison, Richard Penty, Ian White, Andrew Galbraith, Paul Crump, Mark Silver

Proceedings Volume 3944, (2000) https://doi.org/10.1117/12.391423

KEYWORDS: Quantum wells, Temperature metrology, Modeling, Heterojunctions, Electrons, Laser damage threshold, Data modeling, Semiconductor lasers, Cladding, Active optics

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Proceedings Article | 19 May 2000 Paper

Simple multimask technique for fabrication of high-resolution polymer structures

Michael Cowin, Richard Penty, Ian White

Proceedings Volume 3939, (2000) https://doi.org/10.1117/12.386387

KEYWORDS: Polymers, Wavelength division multiplexing, Etching, Waveguides, Fabrication, Diffraction gratings, Integrated optics, Polymer multimode waveguides, Manufacturing, Optical lithography

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Proceedings Article | 1 May 2000 Paper

Gaussian beam profile and single transverse mode emission from previously multimode gain-guided VCSEL using novel etch

Loic Plouzennec, Laurence Sargent, Richard Penty, Ian White, Peter Heard, Michael Tan, Scott Corzine, Shih-Yuan Wang

Proceedings Volume 3946, (2000) https://doi.org/10.1117/12.384378

KEYWORDS: Etching, Vertical cavity surface emitting lasers, Reflectivity, Binary data, Modeling, Lithium, Gaussian beams, Lasers, Refractive index, Spatial filters

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Proceedings Article | 1 May 2000 Paper

Theoretical investigation of the evolution of the transverse modes in vertical-cavity surface-emitting lasers

Kostas Tastavridis, Ian White, Judy Rorison, Richard Penty

Proceedings Volume 3946, (2000) https://doi.org/10.1117/12.384368

KEYWORDS: Vertical cavity surface emitting lasers, Thermal effects, Refractive index, Hole burning spectroscopy, Diffusion, Thermal modeling, Resistance, Mirrors, Lithium, Transparency

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Proceedings Article | 1 May 2000 Paper

Polarization pinning of a VCSEL array

Kostas Tastavridis, Kevin Williams, Laurence Sargent, Peter Heard, Judy Rorison, Richard Penty, Ian White

Proceedings Volume 3946, (2000) https://doi.org/10.1117/12.384363

KEYWORDS: Polarization, Etching, Vertical cavity surface emitting lasers, Optical testing, Mineralogy, Polarization control, Ion beams, Gallium, Ions, Particles

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Proceedings Article | 18 April 2000 Paper

Ridge waveguide 1.55-um DFB lasers with uncooled 10-Gb/s operation at 55 degrees C

Aeneas Massara, Kevin Williams, Richard Penty, Ian White, Frank Wijnands, Paul Crump

Proceedings Volume 3947, (2000) https://doi.org/10.1117/12.382100

KEYWORDS: Eye, Modulation, Oxides, Waveguides, Single mode fibers, Waveguide lasers, Multimode fibers, Laser damage threshold, Signal attenuation, Temperature metrology

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Proceedings Article | 17 April 2000 Paper

Gain switching of GaInN MQW laser diodes

Claudio Marinelli, Igor Khrushchev, Judy Rorison, Richard Penty, Ian White, T. Takeuchi, Hiroshi Amano, Isamu Akasaki, Y. Kaneko, Satoshi Watanabe, Norihide Yamada, Ghulam Hasnain, Richard Schneider, Shih-Yuan Wang, Michael Tan

Proceedings Volume 3938, (2000) https://doi.org/10.1117/12.382817

KEYWORDS: Semiconductor lasers, Ocean optics, Pulsed laser operation, Picosecond phenomena, Quantum wells, Gain switching, Singular optics, Cladding, Signal detection, Quantum efficiency

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Proceedings Article | 24 March 2000 Paper

Smooth and anisotropic ion beam etching of InP with Ar/H2 chemistry

Bulent Cakmak, Siyuan Yu, Richard Penty, Ian White

Proceedings Volume 3936, (2000) https://doi.org/10.1117/12.379944

KEYWORDS: Etching, Ions, Ion beams, Argon, Surface roughness, Anisotropy, Reactive ion etching, Chemistry, Wet etching, Chemical species

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Proceedings Article | 29 April 1999 Paper

Dual-purpose vertical-cavity optoelectronic components for data communication applications

Milan Dragas, Ian White, Richard Penty, Judy Rorison, Peter Heard, Gareth Parry

Proceedings Volume 3627, (1999) https://doi.org/10.1117/12.347097

KEYWORDS: Vertical cavity surface emitting lasers, Sensors, Etching, Signal detection, Reflectivity, Absorption, Optoelectronic devices, Photodetectors, Mirrors, Data communications

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Proceedings Article | 29 April 1999 Paper

Analysis of polarization pinning in vertical-cavity surface-emitting lasers using etched trenches

Laurence Sargent, Judy Rorison, Martin Kuball, Richard Penty, Ian White, Peter Heard, Michael Tan, Scott Corzine, Dubravko Babic, Shih-Yuan Wang

Proceedings Volume 3627, (1999) https://doi.org/10.1117/12.347101

KEYWORDS: Etching, Polarization, Annealing, Vertical cavity surface emitting lasers, Raman spectroscopy, Luminescence, Gallium arsenide, Fabry–Perot interferometers, Semiconducting wafers, Modeling

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Proceedings Article | 29 April 1999 Paper

Angled launch techniques using vertical-cavity surface-emitting lasers for gigabit data links

Matthew Webster, Ian White, Richard Penty

Proceedings Volume 3627, (1999) https://doi.org/10.1117/12.347098

KEYWORDS: Eye, Vertical cavity surface emitting lasers, Chlorine, Multimode fibers, Tolerancing, Laser sources, Time metrology, Modulation, Manufacturing, Objectives

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Proceedings Article | 14 April 1999 Paper

Novel optical vibration sensor using external cavity feedback

Christine Mignosi, Roger Griffiths, Michael Bordovsky, Christopher Morgan, Ian White, Nicholas Lieven

Proceedings Volume 3626, (1999) https://doi.org/10.1117/12.345438

KEYWORDS: Sensors, Semiconductor lasers, Optical sensors, Signal detection, Vibrometry, Reflectivity, Reflectors, Electronic filtering, Calibration, Laser optics

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Proceedings Article | 13 April 1999 Paper

Overcoming the model bandwidth limitation of multimode fiber by using passband modulation

Lutz Raddatz, Ian White, Matthew Webster, Richard Penty

Proceedings Volume 3632, (1999) https://doi.org/10.1117/12.344594

KEYWORDS: Modulation, Particle filters, Eye, Multimode fibers, Signal detection, Vertical cavity surface emitting lasers, Multiplexing, Digital modulation, Phase shifts, Wavelength division multiplexing

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Proceedings Article | 1 June 1998 Paper

External-cavity laser diode sensing for vibration measurement in aerospace applications

Nicholas Lieven, Ian White, Christine Mignosi, Roger Griffiths, Richard Penty

Proceedings Volume 3411, (1998) https://doi.org/10.1117/12.307685

KEYWORDS: Sensors, Semiconductor lasers, Vibrometry, Aerospace engineering, Bandpass filters, Reflectivity, Standards development, Laser interferometry, Optical filters, Linear filtering

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Proceedings Article | 22 December 1997 Paper

Beam control and manipulation in vertical-cavity surface-emitting lasers

Ian White, P. Dowd, Peter Heard, J. Nicholson, B. Zhu, Lutz Raddatz, Richard Penty, J. Day, G. Allen, Scott Corzine, Michael Tan

Proceedings Volume 3290, (1997) https://doi.org/10.1117/12.298227

KEYWORDS: Etching, Polarization, Vertical cavity surface emitting lasers, Reflectivity, Polarization control, Gallium arsenide, Beam controllers, Oxides, Chlorine, Ion beams

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Proceedings Article | 16 June 1993 Paper

Enhancement of the harmonic performance of a semiconductor optical amplifier using bias current feedback

Julie Constable, Ian White, Alastair Coles, David Cunningham

Proceedings Volume 1850, (1993) https://doi.org/10.1117/12.146925

KEYWORDS: Modulation, Distortion, Semiconductor lasers, Phase shift keying, Feedback loops, Semiconductor optical amplifiers, Optical amplifiers, Signal detection, Laser applications, Technologies and applications

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Proceedings Article | 26 June 1992 Paper

High-frequency modulation of semiconductor laser amplifiers

Andrew Lomax, Ian White

Proceedings Volume 1634, (1992) https://doi.org/10.1117/12.59142

KEYWORDS: Modulation, Optical amplifiers, Semiconductor lasers, Picosecond phenomena, Amplifiers, Oscilloscopes, Pulsed laser operation, Laser applications, Technologies and applications, Laser amplifiers

Read Abstract +

Proceedings Article | 1 May 1990 Paper

Measurement of polarization-dependent all-optical nonlinearity in GaAs/AlGaAs quantum well waveguides far from the band edge

Ian White, Hon Tsang, Richard Penty

Proceedings Volume 1216, (1990) https://doi.org/10.1117/12.18105

KEYWORDS: Waveguides, Absorption, Quantum wells, Fabry–Perot interferometers, Polarization, Refractive index, Mirrors, Reflectivity, Nonlinear optical materials, Photonic devices

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Showing 5 of 76 publications

Proceedings Volume Editor (5)

SPIE Conference Volume | 11 November 2008

Passive Components and Fiber-based Devices V

SPIE Conference Volume | 1 November 2007

Passive Components and Fiber-based Devices IV

SPIE Conference Volume | 21 September 2006

Passive Components and Fiber-based Devices III

SPIE Conference Volume | 14 April 2006

Semiconductor Lasers and Laser Dynamics II

SPIE Conference Volume | 30 November 2005

Passive Components and Fiber-based Devices II

Conference Committee Involvement (24)

Optical Interconnects and Packaging 2025

25 January 2025 | San Francisco, California, United States

Optical Interconnects XXIV

29 January 2024 | San Francisco, California, United States

Optical Interconnects XXIII

1 February 2023 | San Francisco, California, United States

Optical Interconnects XXII

25 January 2022 | San Francisco, California, United States

Optical Interconnects XXI

6 March 2021 | Online Only, California, United States

Optical Interconnects XX

4 February 2020 | San Francisco, California, United States

Optical Interconnects XIX

5 February 2019 | San Francisco, California, United States

Optical Interconnects XVIII

29 January 2018 | San Francisco, California, United States

Optical Interconnects XVII

30 January 2017 | San Francisco, California, United States

Optical Interconnects XVI

15 February 2016 | San Francisco, California, United States

Optical Interconnects XV

9 February 2015 | San Francisco, California, United States

Optical Interconnects XIV

3 February 2014 | San Francisco, California, United States

Optoelectronic Interconnects XIII

3 February 2013 | San Francisco, California, United States

Optoelectronic Interconnects XII

23 January 2012 | San Francisco, California, United States

Passive Components and Fiber-based Devices V

27 October 2008 | Hangzhou, China

Passive Components and Fiber-Based Devices

2 November 2007 | Wuhan, China

Passive Components and Fiber-based Devices III

5 September 2006 | Gwangju, South Korea

Semiconductor Lasers and Laser Dynamics II

3 April 2006 | Strasbourg, France

Passive Components and Fiber-based Devices II

7 November 2005 | Shanghai, China

Optoelectronics and Photonic Devices

5 April 2005 | Dublin, Ireland

Vertical-Cavity Surface-Emitting Lasers IX

26 January 2005 | San Jose, California, United States

Semiconductor Lasers and Laser Dynamics

27 April 2004 | Strasbourg, France

Vertical-Cavity Surface-Emitting Lasers VIII

28 January 2004 | San Jose, CA, United States

Vertical-Cavity Surface-Emitting Lasers VII

29 January 2003 | San Jose, CA, United States

Showing 5 of 24 Conference Committees

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