Compensation-free high-dimensional free-space optical communication using turbulence-resilient vector beams

Zhu, Ziyi; Janasik, Molly; Fyffe, Alexander; Hay, Darrick; Zhou, Yiyu; Kantor, Brian; Winder, Taylor; Boyd, Robert W.; Leuchs, Gerd; Shi, Zhimin

doi:10.1038/s41467-021-21793-1

Cited by 121 publications

(54 citation statements)

References 56 publications

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“…The lack of complete characterisation of such laser sources represents a bottleneck in a growing number of consumer, medical, automotive, sensing and imaging applications 44 . Our method unlocks information that can benefit these applications, as well as support many other areas where the full knowledge of the beam is critical, such as laser engineering 7 , optical communication in fibres and free-space 45 , quantum information 46 and remote sensing 47 . Moreover, the compatibility of the method with any intensity-based detectors opens diverse opportunities for in-depth laser diagnostics.…”

Section: Discussionmentioning

confidence: 91%

Spatial, spectral, temporal and polarisation resolved state tomography of light

Plöschner¹,

Morote²,

Dahl³

et al. 2022

Preprint

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The ability to measure polarisation, spectrum, temporal dynamics, and spatial amplitude and phase of optical beams is essential to study fundamental phenomena in laser dynamics, telecommunications and nonlinear optics. Current characterisation techniques only apply in limited contexts. Non-interferometric methods typically lack access to spatial phase, while phase-sensitive approaches necessitate either an auxiliary reference source or an adequate self-reference, neither of which is universally available. Regardless of the reference, deciphering complex wavefronts of multiple co-propagating incoherent fields remains particularly challenging. Here, we harness the principles of quantum state tomography to circumvent these limitations. A full description of an unknown beam is retrieved by measuring its temporally and spectrally resolved density matrices for both polarisations, using a spatial light modulator to display projective holograms and a single-mode fibre to guide the collected signal to a high-speed photodiode and a spectrometer. Despite no spatial resolution of the detector and the intensity-only character of the collected signal, the method resolves multiple arbitrary spatial fields within a single beam, including their phase and amplitude, as well as their spatial coherence. Leveraging the coherence information unlocks unambiguous determination of the spectral and temporal evolution of mutually incoherent fields, even when these spectrally overlap or have an identical time delay. We demonstrate these hallmark features by characterising the rich spatiotemporal and spectral output of a vertical-cavity surface-emitting laser diode that has so far resisted full analysis using existing techniques.

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Section: Discussionmentioning

confidence: 91%

Spatial, spectral, temporal and polarisation resolved state tomography of light

Plöschner¹,

Morote²,

Dahl³

et al. 2022

Preprint

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“…There are also other quantum channels with inhomogeneous loss and noise, such as atmospheric turbulence and diffraction. Recently, it has been shown that other optical fields carrying OAM, such as vector beams, are turbulence-resilient in atmospheric turbulence [52]. Thus it is worthwhile to investigate the turbulence-resilient characteristics of OAM multiplexed CV quantum entanglement and steering, which have the potential to substantially improve the quantum communication distance and fidelity.…”

Section: Discussionmentioning

confidence: 99%

Deterministic distribution of orbital angular momentum multiplexed continuous-variable entanglement and quantum steering

Zeng,

Ma,

Wen

et al. 2022

Preprint

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Orbital angular momentum (OAM) multiplexing provides an efficient method to improve data-carrying capacity in various quantum communication protocols. It is a precondition to distribute OAM multiplexed quantum resources in quantum channels for implementing quantum communication. However, quantum steering of OAM multiplexed optical fields and the effect of channel noise on OAM multiplexed quantum resources remain unclear. Here, we generate OAM multiplexed continuous-variable (CV) entangled states and distribute them in lossy or noisy channels. We show that the decoherence property of entanglement and quantum steering of the OAM multiplexed states carrying topological charges l = 1 and l = 2 are the same as that of the Gaussian mode with l = 0 in lossy and noisy channels. The sudden death of entanglement and quantum steering of high-order OAM multiplexed states is observed in the presence of excess noise. Our results demonstrate the feasibility to realize high data-carrying capacity quantum information processing by utilizing OAM multiplexed CV entangled states.

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“…Optical communication systems are currently presented as a very competitive solution for the establishment of high capacity point-to-point wireless links, becoming an alternative [ 1 , 2 , 3 ] or, in the case of new generation networks [ 4 , 5 , 6 , 7 ], a complementary technology. This is the approach that has been included in the development of the 5G+ backbone systems infrastructure standard, which foresees the coexistence of millimeter radio technologies with terrestrial free-space optical (FSO) communications systems [ 8 , 9 , 10 , 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Cooperative Terrestrial-Underwater Wireless Optical Links by Using an Amplify-and-Forward Strategy

Jurado-Navas

Álvarez-Roa

et al. 2022

Sensors

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In this paper, we analyze a combined terrestrial-underwater optical communication link for providing high-speed optical connectivity between onshore and submerge systems. For this purpose, different transmission signaling schemes were employed to obtain performance results in terms of average bit error rate (ABER). In this sense, from the starting point of a known conditional bit-error-rate (CBER) in the absence of turbulence, the behavior of the entire system is obtained by applying an amplify-and-forward (AF) based dual-hop system: The first link is a terrestrial free-space optical (FSO) system assuming a Málaga distributed turbulence and, the second one, is an underwater FSO system with a Weibull channel model. To obtain performance results, a semi-analytical simulation procedure is applied, using a hyper-exponential fitting technique previously proposed by the authors and leading to BER closed-form expressions and high-accuracy numerical results.

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Compensation-free high-dimensional free-space optical communication using turbulence-resilient vector beams

Cited by 121 publications

References 56 publications

Spatial, spectral, temporal and polarisation resolved state tomography of light

Spatial, spectral, temporal and polarisation resolved state tomography of light

Deterministic distribution of orbital angular momentum multiplexed continuous-variable entanglement and quantum steering

Cooperative Terrestrial-Underwater Wireless Optical Links by Using an Amplify-and-Forward Strategy

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