Progress Toward Spatially-Entangled Photon-Pair Generation in a Few-Mode Fiber

Shamsshooli, Afshin; Guo, Chunyu; Parmigiani, Francesca; Li, Xiaoying; Vasilyev, Michael

doi:10.1109/lpt.2021.3089537

Cited by 14 publications

(3 citation statements)

References 18 publications

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“…Similar spatially-entangled photon pairs can also be generated directly in the FMF [26], but, in contrast to PPLN, this requires a different set of two IM-FWM processes, as we have shown for both (LP01, LP11a) [27,28] and orbital-angularmomentum-compatible (LP11a, LP11b) [29] two-mode signal spaces. Using classical-level input signals, we have observed high signal-idler mode selectivity for these two individual processes, and demonstrated that, when combined, these two processes couple the input two-mode seed signal to an orthogonal two-mode idler for various signal-mode superpositions [28,30].…”

Section: Progress On Spatially-entangled Photon-pair Generation In Gu...mentioning

confidence: 83%

Devices for quantum communication over mode-division-multiplexing systems

Shamsshooli

Kwon

Guo

et al. 2023

Quantum Computing, Communication, and Simulation III

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In the absence of quantum repeaters, the only way to increase the quantum communication capacity at a given reach is to employ more modes for encoding and transmitting information. While frequency, temporal, and polarization modes have already been exploited for this purpose, the use of many spatial modes over long distances has only recently become possible owing to the development of low-loss few-mode fibers (FMFs).We will discuss the development of two key enablers of quantum communication over FMF spatial modes: 1) spatiallyentangled photon-pair generator and 2) dynamically-reconfigurable spatial-mode de-multiplexer that can perform projective measurements alternating between two sets of mutually unbiased bases in a given spatial mode space. Both devices are based on the spatial-mode-selective quantum frequency conversion process, implemented in either χ (2) (multimode LiNbO3 waveguide) or χ (3) (custom-made FMF) nonlinear medium.

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Section: Progress On Spatially-entangled Photon-pair Generation In Gu...mentioning

confidence: 83%

Devices for quantum communication over mode-division-multiplexing systems

Shamsshooli

Kwon

Guo

et al. 2023

Quantum Computing, Communication, and Simulation III

Self Cite

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“…Therefore, by adjusting the dispersion characteristics of the multimode fiber, so that phase matching is accomplished outside of the spectral bands of these noise sources, the effects of spontaneous Raman scattering and ASE from a highpower pump may be minimized to an inconsequential level. Additionally, FWM in fibers has been employed in quantum communication research to create correlated photon pairs 11 and generally enables frequency conversion of quantum states of light 12 . The latter has been proven in single-mode operation in both a photonic crystal fiber 13 and a dispersionshifted extremely nonlinear fiber 14 , where phase matching was obtained beyond the Raman spectrum at the expense of inherently small bandwidths.…”

Section: Introductionmentioning

confidence: 99%

Entangled photon pair generation via spontaneous intermodal four-wave mixing in a 25km few-mode fiber

Montazeri

Esmaeelpour²

2023

Quantum Computing, Communication, and Simulation III

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High degrees of security have been achieved in quantum communication over fiber using entangled photons. For communications applications, it is crucial to produce high-yield entangled photon pairs (EPPs) with the capacity to transmit them over telecommunication-length fiber distances and the ability to integrate and transmit them over existing classical communication systems. Since spatial division multiplexing (SDM) is currently being demonstrated to replace single-mode communication systems, it only makes sense to demonstrate the generation and transferring EPPs in various fiber modes suitable for generation and transmission in SDM fibers. We experimentally demonstrate EPP formation in a 25-km-long graded-index few-mode fiber (three modes) via the intermodal spontaneous four-wave mixing (SFWM) effect. Mode profile and phase matching condition have been confirmed through experiments.

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“…IM-SFWM could generate photon pairs far from the pump frequency due to the phasematching mechanism with the difference dispersion properties of different spatial modes of the multi-or few-mode waveguide. There have been several theoretical investigation and successful demonstration of photon pair source via IM-SFWM in step-index fiber [46][47][48], graded-index fiber [49], polarization maintaining fiber [50,51], and few-mode fiber [52]. Most studies of photon pair source based on the IM-SFWM were conducted in the near infrared region.…”

Section: Introductionmentioning

confidence: 99%

Optical fiber polarization-entangled photon pair source using intermodal spontaneous four-wave mixing in the visible spectral band

Lee¹,

Jung²,

Lee³

2022

Laser Phys. Lett.

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The theoretical and experimental investigation results of the generation of the polarization-entangled photon pairs operating at visible wavelengths are reported. The generation of polarization-entangled photon pairs was based on intermodal spontaneous four-wave mixing (IM-SFWM) using standard step-index few-mode fiber. It was shown theoretically that several combinations of IM-SFWM processes could occur depending on spatial modes of a pump beam. A polarization-entangled photon pair source based on Sagnac loop incorporating a segment of few-mode fiber were then experimentally created. A two-photon interference fringe visibility of our implemented photon pair source were 91.7% and 88.8% in H/V bases and D/A bases, respectively. A quantum state tomography was also conducted to reconstruct the density matrix of the generated state with a fidelity to a maximum entangled state of 93.1%.

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Progress Toward Spatially-Entangled Photon-Pair Generation in a Few-Mode Fiber

Cited by 14 publications

References 18 publications

Devices for quantum communication over mode-division-multiplexing systems

Devices for quantum communication over mode-division-multiplexing systems

Entangled photon pair generation via spontaneous intermodal four-wave mixing in a 25km few-mode fiber

Optical fiber polarization-entangled photon pair source using intermodal spontaneous four-wave mixing in the visible spectral band

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