All-optical mode unscrambling on a silicon photonic chip
Francesco Morichetti,Andrea Melloni,Nicola Peserico,Emanuele Guglielmi,Marco Carminati,Marc Sorel,Giorgio Ferrari,Andrea Annoni,Pietro Ciccarella,Stefano Grillanda +9 more
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TLDR
In this paper, a mesh of silicon photonics Mach-Zehnder interferometers is used to self-configure and reset itself after significantly perturbing the mixing, without turning off the beams.Abstract:
Propagation of light beams through scattering or multimode systems may lead to randomization of the spatial coherence of the light. Although information is not lost, its recovery requires a coherent interferometric reconstruction of the original signals, which have been scrambled into the modes of the scattering system. Here, we show that we can automatically unscramble four optical beams that have been arbitrarily mixed in a multimode waveguide, undoing the scattering and mixing between the spatial modes through a mesh of silicon photonics Mach-Zehnder interferometers. Using embedded transparent detectors and a progressive tuning algorithm, the mesh self-configures automatically and reset itself after significantly perturbing the mixing, without turning off the beams. We demonstrate the recovery of four separate 10 Gbits/s information channels, with residual cross-talk between beams of -20dB. This principle of self-configuring and self-resetting in optical systems should be applicable in a wide range of optical applications.read more
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Integrated microwave photonics
TL;DR: The maturity of high-volume semiconductor processing has finally enabled the complete integration of light sources, modulators and detectors in a single microwave photonic processor chip and has ushered the creation of a complex signal processor with multifunctionality and reconfiguration similar to electronic devices.
Journal ArticleDOI
Programmable photonic circuits.
Wim Bogaerts,Daniel Pérez,José Capmany,David A. B. Miller,Joyce K. S. Poon,Joyce K. S. Poon,Dirk Englund,Francesco Morichetti,Andrea Melloni +8 more
TL;DR: Generic chips can accelerate the development of future photonic circuits by providing a higher-level platform for prototyping novel optical functionalities without the need for custom chip fabrication.
Journal ArticleDOI
Linear programmable nanophotonic processors
Nicholas C. Harris,Jacques Carolan,Darius Bunandar,Mihika Prabhu,Michael Hochberg,Tom Baehr-Jones,Michael L. Fanto,A. Matthew Smith,Christopher C. Tison,Paul M. Alsing,Dirk Englund +10 more
TL;DR: Progress in such “programmable nanophotonic processors” as well as emerging applications of the technology to problems including classical and quantum information processing and machine learning are covered.
Journal ArticleDOI
Optical orbital-angular-momentum-multiplexed data transmission under high scattering
TL;DR: A novel scattering-matrix-assisted retrieval technique (SMART) to demultiplex OAM channels from highly scattered optical fields is proposed and high-fidelity transmission of both gray and color images under scattering conditions is demonstrated, reducing the error rate by 21 times compared to previous reports.
Journal ArticleDOI
Feedback control for microring weight banks
Alexander N. Tait,Hasitha Jayatilleka,Thomas Ferreira de Lima,Philip Y. Ma,Mitchell A. Nahmias,Bhavin J. Shastri,Sudip Shekhar,Lukas Chrostowski,Paul R. Prucnal +8 more
TL;DR: Continuous, multi-channel control of a microring weight bank with an effective 5.1 bits of accuracy on 2Gbps signals is demonstrated and feedback weight control renders tractable the weight control problem in reconfigurable analog photonic networks.
References
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Deep learning with coherent nanophotonic circuits
TL;DR: A new architecture for a fully optical neural network is demonstrated that enables a computational speed enhancement of at least two orders of magnitude and three order of magnitude in power efficiency over state-of-the-art electronics.
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Focusing coherent light through opaque strongly scattering media
Ivo M. Vellekoop,Allard Mosk +1 more
TL;DR: Focusing of coherent light through opaque scattering materials by control of the incident wavefront with a brightness up to a factor of 1000 higher than the brightness of the normal diffuse transmission is reported.
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Controlling waves in space and time for imaging and focusing in complex media
TL;DR: In this article, the authors used strongly scattering materials to focus, shape and compress waves by controlling the many degrees of freedom in the incident waves in complex media such as white paint and biological tissue.
Journal ArticleDOI
Universal linear optics
Jacques Carolan,Chris Harrold,Chris Sparrow,Chris Sparrow,Enrique Martin-Lopez,Nicholas Russell,Joshua W. Silverstone,Peter Shadbolt,Nobuyuki Matsuda,Manabu Oguma,Mikitaka Itoh,Graham D. Marshall,Mark G. Thompson,Jonathan C. F. Matthews,Toshikazu Hashimoto,Jeremy L. O'Brien,Anthony Laing +16 more
TL;DR: In this paper, a sixmode universal system consisting of a cascade of 15 Mach-Zehnder interferometers with 30 thermo-optic phase shifters integrated into a single photonic chip was demonstrated.
Journal ArticleDOI
Mode-Division Multiplexing Over 96 km of Few-Mode Fiber Using Coherent 6 $\,\times\,$ 6 MIMO Processing
R. Ryf,Sebastian Randel,Alan H. Gnauck,C. Bolle,A. Sierra,Sami Mumtaz,Mina Esmaeelpour,Ellsworth Burrows,R.-J. Essiambre,Peter J. Winzer,D. W. Peckham,Alan McCurdy,Robert Lingle +12 more
TL;DR: In this article, simultaneous transmission of six spatial and polarization modes, each carrying 40 Gb/s quadrature-phase-shift-keyed channels over 96 km of a low-differential group delay few-mode fiber, is reported.