Featured
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Article |
A hybrid optical–wireless network for decimetre-level terrestrial positioning
A terrestrial networked positioning system based on a hybrid optical–wireless telecommunication infrastructure and that is independent of global navigation satellite systems is demonstrated for urban environments with decimetre-level accuracy.
- Jeroen C. J. Koelemeij
- , Han Dun
- & Christian C. J. M. Tiberius
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Article |
An integrated space-to-ground quantum communication network over 4,600 kilometres
A quantum network that combines 700 fibre and two ground-to-satellite links achieves quantum key distribution between more than 150 users over a combined distance of 4,600 kilometres.
- Yu-Ao Chen
- , Qiang Zhang
- & Jian-Wei Pan
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Letter |
Ultrafast spin-lasers
Room-temperature modulation frequencies exceeding 200 GHz are demonstrated in birefringent semiconductor spin-lasers by coupling the spin of the charge carriers to the light polarization.
- Markus Lindemann
- , Gaofeng Xu
- & Nils C. Gerhardt
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Letter |
An entanglement-based wavelength-multiplexed quantum communication network
A fully connected quantum network is demonstrated in which one source of entangled photons distributes quantum states to four users, with the potential for many more users to be added.
- Sören Wengerowsky
- , Siddarth Koduru Joshi
- & Rupert Ursin
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Letter |
Integrated lithium niobate electro-optic modulators operating at CMOS-compatible voltages
Chip-scale lithium niobate electro-optic modulators that rapidly convert electrical to optical signals and use CMOS-compatible voltages could prove useful in optical communication networks, microwave photonic systems and photonic computation.
- Cheng Wang
- , Mian Zhang
- & Marko Lončar
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Letter |
Overcoming the rate–distance limit of quantum key distribution without quantum repeaters
Twin optical fields enable a form of quantum key distribution that can exceed the secret-key capacity without using quantum repeaters and that has security independent of the measuring devices.
- M. Lucamarini
- , Z. L. Yuan
- & A. J. Shields
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Letter |
Microresonator-based solitons for massively parallel coherent optical communications
Frequency combs produced by solitons in silicon-based optical microresonators are used to transmit data streams of more than 50 terabits per second in telecommunication wavelength bands.
- Pablo Marin-Palomo
- , Juned N. Kemal
- & Christian Koos
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Letter |
A quantum access network
An experimental demonstration of the concept of a ‘quantum access network’ based on simple and cost-effective telecommunication technologies yields a viable method for realizing multi-user quantum key distribution networks with efficient use of resources.
- Bernd Fröhlich
- , James F. Dynes
- & Andrew J. Shields
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Letter |
A temporal cloak at telecommunication data rate
The ‘time cloak’ experiment is extended here using a time analogue of the Talbot effect in optics — in which a plane wave incident on a diffraction grating produces repeated images of the grating at regular distances — to show that almost half of the time axis can be concealed.
- Joseph M. Lukens
- , Daniel E. Leaird
- & Andrew M. Weiner
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Research Highlights |
Technology for thinner probes
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News |
Quantum cryptography conquers noise problem
Encoded photons sent a record distance along busy optical fibres.
- Zeeya Merali
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News |
Underwater robot automates ocean testing
'Lab in a can' eliminates the middleman between sample site and lab.
- Richard A. Lovett
The break of earthquake asperities imaged by distributed acoustic sensing