Programmable linear quantum networks with a multimode fibre

Leedumrongwatthanakun, Saroch; Innocenti, Luca; Defienne, Hugo; Juffmann, Thomas; Ferraro, Alessandro; Paternostro, Mauro; Gigan, Sylvain

doi:10.1038/s41566-019-0553-9

Cited by 102 publications

(65 citation statements)

References 53 publications

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“…In fact, if O(N 2 ) degrees of control are available, one can expect generating arbitrary N × N transformations between the input and output modes. Over the past two decades there is an ever-growing interest in realizing reconfigurable multimode transformations, for a wide range of applications, such as quantum photonic circuits [22,[31][32][33][34] optical communications [18,35], and nanophotonic processors [20,36]. These realizations require strong mixing of the input modes, as the output modes are arbitrary superpositions of the input modes.…”

Section: Discussionmentioning

confidence: 99%

Wavefront shaping in multimode fibers by transmission matrix engineering

et al. 2020

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One of the greatest challenges in utilizing multimode optical fibers is mode-mixing and inter-modal interference, which scramble the information delivered by the fiber. A common approach for canceling these effects is to tailor the optical field at the input of the fiber to obtain a desired field at its output. In this work, we present a new approach which relies on modulating the transmission matrix of the fiber rather than the incident light. We apply computer-controlled mechanical perturbations to the fiber to obtain a desired intensity pattern at its output. Using an all-fiber apparatus, we demonstrate focusing light at the distal end of the fiber and conversion between fiber modes. Since in this approach the number of degrees of control can be larger than the number of fiber modes, it allows simultaneous control over multiple inputs and multiple wavelengths.

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Section: Discussionmentioning

confidence: 99%

Wavefront shaping in multimode fibers by transmission matrix engineering

et al. 2020

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“…Leedumrongwatthanakun and colleagues report in ref. [] the implementation of a fully programmable high‐dimensional linear optical network by using spatial and polarization mixing processes in a multimode fiber.…”

Section: Quantum Communicationsmentioning

confidence: 99%

High‐Dimensional Quantum Communication: Benefits, Progress, and Future Challenges

et al. 2019

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In recent years, there has been a rising interest in high‐dimensional quantum states and their impact on quantum communication. Indeed, the availability of an enlarged Hilbert space offers multiple advantages, from larger information capacity and increased noise resilience, to novel fundamental research possibilities in quantum physics. Multiple photonic degrees of freedom have been explored to generate high‐dimensional quantum states, both with bulk optics and integrated photonics. Furthermore, these quantum states have been propagated through various channels, for example, free‐space links, single‐mode, multicore, and multimode fibers, and also aquatic channels, experimentally demonstrating the theoretical advantages over 2D systems. Here, the state‐of‐the‐art on the generation, propagation, and detection of high‐dimensional quantum states is reviewed. Quantum communication with states living in d‐dimensional Hilbert spaces, qudits, yields great benefits. However, qudits generation, transmission, and detection is not a simple task to accomplish. This review presents the state‐of‐the‐art on the generation, propagation, and measurement of high‐dimensional quantum states, highlighting their advantages, issues, and future perspectives.

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“…The techniques of Refs. [14,19,33], and the use of multimode fibers, may be particularly useful in this direction.…”

Section: Discussionmentioning

confidence: 99%