Sidelobe-modulated optical vortices for free-space communication

Jia, Pengbo; Yang, Yong; Min, Changjun; Fang, Hui; Yuan, Xiaocong

doi:10.1364/ol.38.000588

Cited by 50 publications

(26 citation statements)

References 13 publications

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“…In the field of optics, several different strands of research have led to a renewed optimism over the possibility of encoding and optically transmitting higher dimensionality information [14][15][16][17][18][19][20][21]. One feature that has aroused considerable recent interest is the rediscovered quantitation of 'optical chirality' and its associated flux for classical and quantum optical fields [22][23][24][25].…”

Section: The Polarization Basis In Opticsmentioning

confidence: 99%

Expanded horizons for generating and exploring optical angular momentum in vortex structures

2013

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Spin provides for a well-known extension to the information capacity of nanometer-scale electronic devices. Spin transfer can be effected with high fidelity between quantum dots, this type of emission being primarily associated with emission dipoles. However, in seeking to extend the more common spectroscopic connection of dipole transitions with orbital angular momentum, it has been shown impossible to securely transmit information on any other multipolar basis -partly because point detectors are confined to polarization measurement. Standard polarization methods in optics provide for only two independent degrees of freedom, such as the circular states of opposing handedness associated with photon spin. Complex light beams with structured wave-fronts or vector polarization do, however, offer a basis for additional degrees of freedom, enabling individual photons to convey far more information content. A familiar example is afforded by Laguerre-Gaussian modes, whose helically twisted wave-front and vortex fields are associated with orbital angular momentum. Each individual photon in such a beam has been shown to carry the entire spatial helical-mode information, supporting an experimental basis for sorting beams of different angular momentum content. One very recent development is a scheme for such optical vortices to be directly generated through electronic relaxation processes in structured molecular chromophore arrays.

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Section: The Polarization Basis In Opticsmentioning

confidence: 99%

Expanded horizons for generating and exploring optical angular momentum in vortex structures

2013

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“…For OAM-SK, the OAM states of the OV beams are regarded as a modulation format that enables the encoding of information by dynamic switching of spatial light modulators. 7,[19][20][21][22] For OAM-DM, the OAM states are considered to be fixed channels to be used to carry information with the advantages of high bit rates and low bit error rates (BERs). 13,23 In a state-of-the-art demonstration of an OAM-based FSO communication system, 2.56 Tbit s 21 data transmission was obtained by the multiplexing of four OAM beams with two polarization states.…”

Section: Introductionmentioning

confidence: 99%

Massive individual orbital angular momentum channels for multiplexing enabled by Dammann gratings

et al. 2015

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Data transmission rates in optical communication systems are approaching the limits of conventional multiplexing methods. Orbital angular momentum (OAM) in optical vortex beams offers a new degree of freedom and the potential to increase the capacity of free-space optical communication systems, with OAM beams acting as information carriers for OAM division multiplexing (OAM-DM). We demonstrate independent collinear OAM channel generation, transmission and simultaneous detection using Dammann optical vortex gratings (DOVGs). We achieve 80/160 Tbit s 21 capacity with uniform power distributions along all channels, with 1600 individually modulated quadrature phase-shift keying (QPSK)/16-QAM data channels multiplexed by 10 OAM states, 80 wavelengths and two polarizations. DOVG-enabled OAM multiplexing technology removes the bottleneck of massive OAM state parallel detection and offers an opportunity to raise optical communication systems capacity to Pbit s 21 level.

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“…The optical vortex points to a field with a helical phase front and an annular intensity cross section [1]. Because the vortex beam carries orbital angular momentum, it has potential applications in optical tweezing [2], optical communication [3][4][5], optical wrenching [6], optical trapping [7][8][9], information processing [10][11][12] and other fields. Studies on the generation and manipulation of the optical vortex have attracted much attention.…”

Section: Introductionmentioning

confidence: 99%

Plasmonic vortex generator without polarization dependence

Wang

Liu

et al. 2018

New J. Phys.

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In view of the limitations of vortex generators with polarization dependence at present, we propose a plasmonic vortex generator composed of rectangular holes etched in silver film, in which the optical vortex can be generated under arbitrary linearly polarized light illumination. Two sets of rectangular holes are arranged equidistantly on a circle and rotate in postulate directions. Theoretical analysis provides the design principle for the vortex generator, and numerical simulations give guidance on designating the vortex generator parameters. Experimental measurements verify the performance of the proposed vortex generator. Moreover, two alternative structures for the generation of a plasmonic vortex are also provided in this paper. The resulting perfect vortex, compact structure and flexible illumination conditions will lead to wide applications of this plasmonic vortex generator.

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Sidelobe-modulated optical vortices for free-space communication

Cited by 50 publications

References 13 publications

Expanded horizons for generating and exploring optical angular momentum in vortex structures

Expanded horizons for generating and exploring optical angular momentum in vortex structures

Massive individual orbital angular momentum channels for multiplexing enabled by Dammann gratings

Plasmonic vortex generator without polarization dependence

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