Fibre optics and optical communications articles within Nature Communications

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  • Article
    | Open Access

    The authors present a scalable on-chip parallel intensity modulation and direct detection (IM-DD) data transmission system. This system offers an aggregate line rate of 1.68 Tbit/s over a 20-km-long SMF. For the chromatic dispersion compensation of 40-km-SMFs, the energy consumption is ~0.3 pJ/bit, much less than the commercial 400G-ZR coherent transceivers counterparts.

    • Yuanbin Liu
    • , Hongyi Zhang
    •  & Andrew W. Poon

  • Article
    | Open Access

    Optical recurrent neural networks present a unique challenge for photonic machine learning. Here, the authors experimentally show the first optoacoustic recurrent operator based on stimulated Brillouin scattering which may unlock a new class of optical neural networks with recurrent functionality.

    • Steven Becker
    • , Dirk Englund
    •  & Birgit Stiller

  • Article
    | Open Access

    Authors present an adaptive underwater optical communication (UWOC) technology based on multi-wavelength lasers and a full-color metasurface for converting visible-band Gaussian to circular autofocusing Airy beams. The potential of Airy beams to mitigate optical power degradation is demonstrated, enabling stable data rate transmission via 4 K video transmission for these systems.

    • Junhui Hu
    • , Zeyuan Guo
    •  & Chao Shen

  • Article
    | Open Access

    The authors investigate light beam propagation in multimode optical fibers, considering linear random mode coupling and Kerr nonlinearity. They utilize a 3D mode decomposition technique, enabling them to accurately characterize modal distributions over extended lengths of graded-index fiber.

    • Mario Zitelli
    • , Fabio Mangini
    •  & Stefan Wabnitz

  • Article
    | Open Access

    The authors introduce and demonstrate experimentally a novel fundamental property of nonlinear multimode optical systems, named mode rejection. This paves the way towards a more general idea of all-optical mode control and its related applications.

    • Kunhao Ji
    • , Ian Davidson
    •  & Massimiliano Guasoni

  • Article
    | Open Access

    The entanglement of fibrous elements produces flexible structures with enhanced strength and resilience to abrasion. Here, the authors report the weaving of organic crystals into flexible and robust patches with plain, twill, and satin topologies of arbitrary porosity, expanding one-dimensional crystals into flexible, two-dimensional planar structures with potential for future applications in flexible electronics.

    • Linfeng Lan
    • , Liang Li
    •  & Hongyu Zhang

  • Article
    | Open Access

    Structured light has proven useful for numerous photonic applications. However, its current use in optical fibers is severely limited. The authors report a highly integrated metafiber platform based on 3D laser nanoprinting, capable of creating arbitrarily structured light.

    • Chenhao Li
    • , Torsten Wieduwilt
    •  & Haoran Ren

  • Article
    | Open Access

    In this work the authors develop a Random optical parametric oscillator - the parametric analogous of random lasers. This system shows improved key metrics like tuneable repetition rates, tuneable pulse duration, inter-pulse coherence as well as simpler configuration compared with standard systems.

    • Pedro Tovar
    • , Jean Pierre von der Weid
    •  & Xiaoyi Bao

  • Article
    | Open Access

    The authors demonstrate here a method for the production of arbitrarily long, light-guiding microstructured fibers with shape-memory properties. The showcased design of adaptative fibers here holds potential for the development of functional actuators and sensors.

    • Clément Strutynski
    • , Marianne Evrard
    •  & Frédéric Smektala

  • Article
    | Open Access

    Determining earthquake faulting orientation is essential for understanding earthquake-stress interactions. Here, the authors present a technique that leverages telecom fiber optic cables to improve the estimation of this fundamental parameter.

    • Jiaxuan Li
    • , Weiqiang Zhu
    •  & Zhongwen Zhan

  • Article
    | Open Access

    Authors present a fibre Bragg grating-based all-pass spectral phase filter with an unprecedented frequency resolution of 1 GHz, at least 10× improvement compared to a standard optical waveshaper. Using the all-fibre phase filter, fully passive NOT and XNOR logic operations are experimentally demonstrated at ultrafast speeds with few-fJ/bit energy consumption.

    • Saket Kaushal
    • , A. Aadhi
    •  & José Azaña

  • Article
    | Open Access

    Twin-field QKD should allow secure quantum communication with favourable rate-loss scaling, but requires interferometric implementations which are often impractical for long distances. Here, the authors show how to realise it without the need for closed interferometers.

    • Lai Zhou
    • , Jinping Lin
    •  & Zhiliang Yuan

  • Perspective
    | Open Access

    The field of terahertz wireless communication is growing rapidly. Here the authors discuss the challenges for the architectures of wireless platforms above 100 GHz and their potential applications.

    • Josep M. Jornet
    • , Edward W. Knightly
    •  & Daniel M. Mittleman

  • Article
    | Open Access

    A unified metric to assess the performances of quantum transducers, i.e., converters of quantum information between different physical systems - is still lacking. Here the authors propose quantum capacity as such metric, and use it to investigate the optimal designs of generic quantum transduction schemes.

    • Chiao-Hsuan Wang
    • , Fangxin Li
    •  & Liang Jiang

  • Article
    | Open Access

    Fibre-based entanglement distribution represents a key primitive for quantum applications such as QKD. Here, the authors demonstrate it across 248 km of deployed fiber, observing stable detected pair rates of 9 Hz for 110 h.

    • Sebastian Philipp Neumann
    • , Alexander Buchner
    •  & Rupert Ursin

  • Article
    | Open Access

    Continuous-variable QKD protocols are usually easier to implement than discrete-variables ones, but their security analyses are less developed. Here, the authors propose and demonstrate in the lab a CVQKD protocol that can generate composable keys secure against collective attacks.

    • Nitin Jain
    • , Hou-Man Chin
    •  & Ulrik L. Andersen

  • Article
    | Open Access

    The work harnesses principles of spatial state tomography to fully characterise an optical beam in space, time, spectrum, and polarisation. Analysis of the output of a vertical-cavity surface-emitting laser illustrates the technique’s capabilities.

    • Martin Plöschner
    • , Marcos Maestre Morote
    •  & Joel Carpenter

  • Article
    | Open Access

    Continuous spectral translation could allow expansion of the bandwidth available for communication without having to develop transceivers for the new bands. Here, the authors demonstrate this using AlGaAsOI nanowaveguides as spectral translators between the mature telecom C band and the 2-μm wavelength band.

    • Deming Kong
    • , Yong Liu
    •  & Hao Hu

  • Article
    | Open Access

    The flow of light in nonlinear media can be considered as superfluid flow and described with quantum hydrodynamics. Here the authors demonstrate superfluid flow, optical rarefaction (retracting piston) and shock (pushing piston) wave pairs and characterize associated phase transitions by using fiber-based platform.

    • Abdelkrim Bendahmane
    • , Gang Xu
    •  & Stefano Trillo

  • Article
    | Open Access

    Several challenges still impede the deployment of optical switches in data centers. The authors report an optical switching and control system to synergistically overcome these challenges and provide enhanced performance for data center applications.

    • Xuwei Xue
    •  & Nicola Calabretta

  • Article
    | Open Access

    Here, the authors demonstrate high-speed imaging through multimode optical fibers by using the high intermodal dispersion to transform 2D spatial information into 1D temporal pulsed signal streams. Deep learning is used to reconstruct the images of micron-scale objects at high frame rates.

    • Zhoutian Liu
    • , Lele Wang
    •  & Qirong Xiao

  • Article
    | Open Access

    The authors observe efficient Brillouin scattering generated by an evanescent field nearby a single pass sub-wavelength waveguide. This work creates an important bridge between Brillouin scattering in waveguides, Brillouin spectroscopy and microscopy.

    • Fan Yang
    • , Flavien Gyger
    •  & Luc Thévenaz

  • Article
    | Open Access

    Kerr frequency combs are a promising laser source for future optical networks. The authors demonstrate coherence-cloning between two remote Kerr combs and improve optical coherent communication in terms of performance, power consumption, and simplicity.

    • Yong Geng
    • , Heng Zhou
    •  & Kun Qiu

  • Article
    | Open Access

    The authors report nonlinear interference changes with shaping block length, modulation symbol rate, and chromatic dispersion when sphere-shaped lightwaves propagate through optical fibre, and suggest a method to predict that change.

    • Junho Cho
    • , Xi Chen
    •  & Robert Tkach

  • Article
    | Open Access

    Precision measurement plays an important role in frequency metrology and optical communications. Here the authors compare two geographically separate ultrastable lasers at 7 × 10−17 fractional frequency instability over a 2220 km optical fibre link and these measurements can be useful for dissemination of ultrastable light to distant optical clocks.

    • M. Schioppo
    • , J. Kronjäger
    •  & G. Grosche

  • Article
    | Open Access

    Exploiting technologies derived from the optical clocks community, the authors demonstrate a setup for twin-field QKD which extends the coherence times by three orders of magnitude, overcoming the main challenge towards real-world implementation.

    • Cecilia Clivati
    • , Alice Meda
    •  & Davide Calonico

  • Article
    | Open Access

    Engineered stop bands to sense an ambient environment can enable many applications. Here, the authors demonstrate well-controlled processes to open high-aspect ratio nanoholes through optical fibre for Bragg gratings in the telecomm spectrum and to enable high-resolution refractive index sensing

    • Keivan Mahmoud Aghdami
    • , Abdullah Rahnama
    •  & Peter R. Herman

  • Article
    | Open Access

    Two-dimensional antennas that can create and steer narrow beams are of interest for modern communication systems. Here, the authors demonstrate a scalable antenna array design that performs these functions with fewer elements than standard approaches and excited only with peripheral sources.

    • Ayman H. Dorrah
    •  & George V. Eleftheriades

  • Article
    | Open Access

    Graphene-based photodetectors have many advantages for applications. Here, the authors demonstrate a high-speed optical coherent receiver for optical communications based on graphene-on-plasmonic slot waveguide photodetectors.

    • Yilun Wang
    • , Xiang Li
    •  & Xinliang Zhang

  • Article
    | Open Access

    Reconfigurable wavelength-selective devices are essential components of flexible optical networks. Here the authors show a silicon-photonic add-drop multiplexer meeting the strict requirements of telecom systems in terms of broadband operation range, hitless tunability and polarization transparency.

    • Francesco Morichetti
    • , Maziyar Milanizadeh
    •  & Andrea Melloni

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