Divergence-degenerated spatial multiplexing towards ultrahigh capacity, low bit-error-rate optical communications

Wan, Zhensong; Shen, Yijie; Wang, Zhaoyang; Shi, Zijian; Liu, Qiang; Fu, Xing

doi:10.48550/arxiv.2110.08815

Cited by 3 publications

(4 citation statements)

References 54 publications

(59 reference statements)

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“…Similar experiments have demonstrated the realization of multi-ary encoding/decoding in a highdimensional space formed by multiple possible states of hybrid vector beams [185]. Recently, multi-DoF nonseparable ray-wave structured light was also exploited to improve the capacity, speed, and dimensionality in communication system [186].…”

Section: Communicationsmentioning

confidence: 77%

Nonseparable states of light: From quantum to classical

Shen,

Rosales-Guzmán

2022

Preprint

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Controlling the various degrees-of-freedom (DoFs) of structured light at both quantum and classical levels is of paramount importance in optics. It is a conventional paradigm to treat diverse DoFs separately in light shaping. While, the more general case of nonseparable states of light, in which two or more DoFs are coupled in a nonseparable way, has become topical recently. Importantly, classical nonseparable states of light are mathematically analogue to quantum entangled states. Such similarity has hatched attractive studies in structured light, e.g. the spin-orbit coupling in vector beams. However, nonseparable classical states of light are still treated in a fragmented fashion, while its forms are not limited by vector beams and its potential is certainly not fully exploited. For instance, exotic space-time coupled pulses nontrivial light shaping towards ultrafast time scales, and ray-wave geometric beams provide new dimensions in optical manipulations. Here we provide a bird's eye view on the rapidly growing but incoherent body of work on general nonseparable states involving various DoFs of light and introduce a unified framework for their classification and tailoring, providing a perspective on new opportunities for both fundamental science and applications.

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Section: Communicationsmentioning

confidence: 77%

Nonseparable states of light: From quantum to classical

Shen,

Rosales-Guzmán

2022

Preprint

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“…[185] In addition to the two-DoF nonseparable vector modes, the multi-DoF nonseparable ray-wave modes were also exploited to further expand the speed and capacity in communication system. [186]…”

Section: Communicationsmentioning

confidence: 99%

Nonseparable States of Light: From Quantum to Classical

Shen

Rosales‐Guzmán

2022

Laser & Photonics Reviews

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Controlling the various degrees‐of‐freedom (DoFs) of structured light at both quantum and classical levels is of paramount importance in optics. It is a conventional paradigm to treat diverse DoFs separately in light shaping. While, the more general case of nonseparable states of light, in which two or more DoFs are coupled in a nonseparable way, has become topical recently. Importantly, classical nonseparable states of light are mathematically analogue to quantum entangled states. Such similarity has hatched attractive studies in structured light, for example, the spin‐orbit coupling in vector beams. However, nonseparable classical states of light are still treated in a fragmented fashion, while its forms are not limited by vector beams and its potential is certainly not fully exploited. For instance, exotic space‐time coupled pulses open nontrivial light shaping toward ultrafast time scales, and ray‐wave geometric beams provide new dimensions in optical manipulations. Here, a bird's eye view on the rapidly growing but incoherent body of work on general nonseparable states involving various DoFs of light is provided and a unified framework for their classification and tailoring, providing a perspective on new opportunities for both fundamental science and applications, is introduced.

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“…Besides, a multiplexing method for high-capacity communications without more bandwidth was proposed by exploiting the spatial shapes of 'twisted' photons [198], which provides a novel idea for expanding communication capacity. Interestingly, SU(2) geometric beams also have 'twisted' orbits during propagation in free space, which exotic spatial structure would have large potential applications in high-capacity and low-error-rate communications [199]. And another twisted optical communication solution was also researched by using OAM [200].…”

Section: High-capacity Encoding and Communicationmentioning

confidence: 99%

“…And another twisted optical communication solution was also researched by using OAM [200]. SU(2) geometric beam has multi-DoFs and exotic spatial structure, demonstrating its widely potential applications in realizing high dimensional encoding and high-capacity communications [199]. Recently, a precise detection method for multiple DoFs of SU(2) structured light was realized assisted by deep-learning, which also enables the design of new secret sharing protocol for high-security communications [201].…”

Section: High-capacity Encoding and Communicationmentioning

confidence: 99%

Rays, waves, SU(2) symmetry and geometry: toolkits for structured light

Shen

2021

J. Opt.

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Structured light refers to the ability to tailor optical patterns in all its degrees of freedom, from conventional 2D transverse patterns to exotic forms of 3D, 4D, and even higher-dimensional modes of light, which break fundamental paradigms and open new and exciting applications for both classical and quantum scenarios. The description of diverse degrees of freedom of light can be based on different interpretations, e.g. rays, waves, and quantum states, that are based on different assumptions and approximations. In particular, recent advances highlighted the exploiting of geometric transformation under general symmetry to reveal the ‘hidden’ degrees of freedom of light, allowing access to higher dimensional control of light. In this tutorial, I outline the basics of symmetry and geometry to describe light, starting from the basic mathematics and physics of SU(2) symmetry group, and then to the generation of complex states of light, leading to a deeper understanding of structured light with connections between rays and waves, quantum and classical. The recent explosion of related applications are reviewed, including advances in multi-particle optical tweezing, novel forms of topological photonics, high-capacity classical and quantum communications, and many others, that, finally, outline what the future might hold for this rapidly evolving field.

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Divergence-degenerated spatial multiplexing towards ultrahigh capacity, low bit-error-rate optical communications

Cited by 3 publications

References 54 publications

Nonseparable states of light: From quantum to classical

Nonseparable states of light: From quantum to classical

Nonseparable States of Light: From Quantum to Classical

Rays, waves, SU(2) symmetry and geometry: toolkits for structured light

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