Efficient measurement of an optical orbital-angular-momentum spectrum comprising more than 50 states

Lavery, Martin P. J.; Robertson, David J.; Sponselli, Anna; Courtial, Johannes; Steinhoff, Nicholas K.; Tyler, Glenn A.; Wilner, Alan; Padgett, Miles J.

doi:10.1088/1367-2630/15/1/013024

Cited by 98 publications

(63 citation statements)

References 23 publications

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“…In that case the waveguides or a fibre groove array could replace the multiple slits. Furthermore, it has been shown recently that the MS works for up to 50 states 32 and that the MS can be improved to reduce the overlap between neighbouring modes 27 . These improvements in MS design suggest that our approach can be readily extended to higher qudit entanglement.…”

Section: Discussionmentioning

confidence: 99%

Interface between path and orbital angular momentum entanglement for high-dimensional photonic quantum information

et al. 2014

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Photonics has become a mature field of quantum information science, where integrated optical circuits offer a way to scale the complexity of the set-up as well as the dimensionality of the quantum state. On photonic chips, paths are the natural way to encode information. To distribute those high-dimensional quantum states over large distances, transverse spatial modes, like orbital angular momentum possessing Laguerre Gauss modes, are favourable as flying information carriers. Here we demonstrate a quantum interface between these two vibrant photonic fields. We create three-dimensional path entanglement between two photons in a nonlinear crystal and use a mode sorter as the quantum interface to transfer the entanglement to the orbital angular momentum degree of freedom. Thus our results show a flexible way to create high-dimensional spatial mode entanglement. Moreover, they pave the way to implement broad complex quantum networks where high-dimensionally entangled states could be distributed over distant photonic chips.

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Section: Discussionmentioning

confidence: 99%

Interface between path and orbital angular momentum entanglement for high-dimensional photonic quantum information

et al. 2014

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“…Complex images can be used as one such set of orthogonal modes and have been shown to be highly efficient in storing data [2,3]. A particularly convenient subset of orthogonal light modes are those defined by their orbital angular momentum (OAM) [4][5][6][7], advocated in many recent fundamental and technological proposals on high dimensional light processing [8][9][10]. OAM modes are characterised by their azimuthally varying phase around a central vortex line.…”

Section: Introductionmentioning

confidence: 99%

High speed switching between arbitrary spatial light profiles

Radwell¹,

Brickus²,

Clark³

et al. 2014

Opt. Express

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Complex images, inscribed into the spatial profile of a laser beam or even a single photon, offer a highly efficient method of data encoding. Here we present a prototype system which can quickly modulate between arbitrary images. We display an array of holograms, each defined by its phase and intensity profile, on a spatial light modulator. The input beam is then steered by an acousto-optic modulator to one of these holograms, where it is converted into the desired light mode. We demonstrate switching between characters within three separate alphabets at a switching rate of up to10 kHz. This rate is limited by our detection system, and we anticipate that the system is capable of far higher rates. Furthermore our system is not limited in efficiency by channel number, making it ideal for quantum communication applications.

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“…This technique is not only limited to Bessel beams, but it can also be implemented with other optical fields [32]. The ability to extract encoded information across two higher-dimensional state spaces will prove useful in quantum communication and information systems.…”

Section: Resultsmentioning

confidence: 99%

Efficient sorting of Bessel beams

Mhlanga

Dudley

McDonald

et al. 2013

Complex Light and Optical Forces VII

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Abstract:We demonstrate the efficient sorter of Bessel beams separating both the azimuthal and radial components. This is based upon the recently reported transformation of angular to transverse momentum states. We separately identify over forty azimuthal and radial components, with a radial spacing of 1588 m −1 , and outline how the device could be used to identify the two spatial dimensions simultaneously.

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Efficient measurement of an optical orbital-angular-momentum spectrum comprising more than 50 states

Cited by 98 publications

References 23 publications

Interface between path and orbital angular momentum entanglement for high-dimensional photonic quantum information

Interface between path and orbital angular momentum entanglement for high-dimensional photonic quantum information

High speed switching between arbitrary spatial light profiles

Efficient sorting of Bessel beams

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