Kabushiki Kaisha Toshiba

Toshiba Research Europe Limited

Andrew James Shields

Zhiliang Yuan

James Dynes

Marco Lucamarini

Anthony John Bennett

Richard Mark Stevenson

Joanna Krystyna Skiba-Szymanska

Robert Ian Woodward

Taofiq Paraiso

Bernd Matthias Frohlich

Andrew Sharpe

David Julian Peter Ellis

Davide Marangon

Beata Ewa Kardynal

Thomas Roger

Zakaria Moktadir

Mirko Sanzaro

Robert William Young

David Mark Whittaker

Innocenzo De Marco

Richard Andrew Hogg

Benjamin Marsh

Jan Huwer

Martin Brian Ward

Mirko Pittaluga

Patrick Un Siong See

Clare Foden

Donald Dominic Arnone

Craig Michael Ciesla

Alexander Giles Davies

Edmund Harold Linfield

Nalin K Patel

James Lee

Thomas David Meany

Alan Plews

Yuen San Lo

Joseph Dolphin

Andrea Barbiero

Benjamin Griffiths

Christopher Meayers

Sokratis Kalliakos

Andrew Simpkins

Jan Henning Huwer

Niklas Adam Bilbo Skold

Oliver Edward Thomas

An optical device comprising: a light routing element coupled to a first optical path and a second optical path such that light received by the light routing element is directed into one of the first optical path or the second optical path; a combiner coupling the first optical path and second optical path into a single output path; a controller applying a control signal to said light routing element, the control signal indicating whether a portion of the light received by the light routing element is directed into the first optical path or into the second optical path; a phase controlling element provided in the first optical path such that there is provided a pre-determined fixed phase difference between a light pulse routed through the first optical path and a light pulse routed through the second optical path.

Optical device

Photon source and method of fabricating a photon source

An optical transmitter for a Quantum Key Distribution (QKD) system, the transmitter comprising: a multi-modal laser; a wavelength tuneable laser arranged to inject light into a cavity of the multi-modal laser, so as to cause the multi-modal laser to output light at a selected wavelength for use in generating pulses to be output by the transmitter; and a modulator for controlling a phase shift between successive pulses output from the transmitter.

Optical transmitter for a quantum key distribution system

A method for use in a quantum communication network comprising a first node, a second node and a third node, the method performed by the third node, the method comprising:

Quantum network and authentication method

An authentication method for quantum communication between two nodes, the method comprising:

Authentication method and system, a quantum communication network, and a node for quantum communication

A quantum communication system comprising:

Transmitter for a quantum communication system, a receiver for a quantum communication system and a method of controlling a quantum communication system

A photon detection system comprising an avalanche photodiode configured to generate a photodiode signal in response to an incident photon. The photon detection system also comprises a biasing circuit configured to supply a gating signal to the avalanche photodiode. The gating signal is a periodic signal configured to reverse bias the avalanche photodiode above and below its breakdown voltage for photon detection during each period. The photon detection system further comprises a non-reflective filter circuit configured to receive, at an input port, the photodiode signal, and provide, at a first output port, a first filtered output signal by applying a low-pass filter with a first cut-off frequency to the received photodiode signal.

Photon detection system including an avalanche photodiode and a biasing circuit to supply a gating signal

A system for generating a biased random bit stream, wherein said biased bit stream has different predetermined probabilities of occurrence for bit '0' and bit “1”, said system comprising:

System and method to generate biased random bit streams and quantum communication system and method

An optical emitter comprising a primary laser and a plurality of secondary lasers wherein each secondary laser is optically injection locked to said primary laser, the emitter further comprising at least one polarisation controller configured to control the polarisation of the output of at least one of the secondary lasers,

Optical emitter, communication system and method

An optical device for a quantum random number generator comprising:

High bandwidth quantum random number generator

A method of exchanging a combined cryptographic key between a first node and a second node, the first node and the second node being connected through a first communication and a second communication network, wherein the first communication network is a quantum communication network wherein information is encoded on weak light pulses; and the first node and the second node being configured to: exchange one or more first cryptographic keys on the first communication network; exchange one or more second cryptographic keys using the second communication network; and form the combined cryptographic key by combining the one or more first cryptographic keys and the one or more second cryptographic keys, such that the first node and the second node share knowledge of the combined cryptographic key.

Secure communication network

An emitter configured to output a sequence of periodic light pulses with different polarisations, the emitter comprising:

Emitter, communication system and method

A photon detection device, configured to couple to a multicore optical fibre, the device comprising a plurality of detection regions, each detection region being arranged to align with just a single core of the multicore optical fibre when the device is coupled to the multicore optical fibre.

Photon detection device and a method of manufacturing a photon detection device

An optical module includes: a quantum photonic integrated circuit; a temperature controller; and a housing configured to house the photonic integrated circuit and the temperature controller. The photonic integrated circuit is attached to the temperature controller, such that the photonic integrated circuit is in thermal communication with the temperature controller, and the temperature controller is attached directly to the housing, such that the temperature controller is in direct thermal communication with the housing.

Optical module, a system, a sending unit, a receiving unit, and a quantum communication system

Optical system and method

Growing community of inventors

Cambridge, United Kingdom

Andrew James Shields