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Title: Orbital Angular Momentum-based Space Division Multiplexing for High-capacity Underwater Optical Communications

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Light-Material Interactions in Energy Conversion (LMI)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1388483
DOE Contract Number:
SC0001293
Resource Type:
Journal Article
Resource Relation:
Journal Name: Scientific Reports; Journal Volume: 6; Journal Issue: 1; Related Information: LMI partners with California Institute of Technology (lead); Harvard University; University of Illinois, Urbana-Champaign; Lawrence Berkeley National Laboratory
Country of Publication:
United States
Language:
English
Subject:
solar (photovoltaic), solid state lighting, phonons, thermal conductivity, electrodes - solar, materials and chemistry by design, optics, synthesis (novel materials), synthesis (self-assembly)

Citation Formats

Ren, Yongxiong, Li, Long, Wang, Zhe, Kamali, Seyedeh Mahsa, Arbabi, Ehsan, Arbabi, Amir, Zhao, Zhe, Xie, Guodong, Cao, Yinwen, Ahmed, Nisar, Yan, Yan, Liu, Cong, Willner, Asher J., Ashrafi, Solyman, Tur, Moshe, Faraon, Andrei, and Willner, Alan E.. Orbital Angular Momentum-based Space Division Multiplexing for High-capacity Underwater Optical Communications. United States: N. p., 2016. Web. doi:10.1038/srep33306.
Ren, Yongxiong, Li, Long, Wang, Zhe, Kamali, Seyedeh Mahsa, Arbabi, Ehsan, Arbabi, Amir, Zhao, Zhe, Xie, Guodong, Cao, Yinwen, Ahmed, Nisar, Yan, Yan, Liu, Cong, Willner, Asher J., Ashrafi, Solyman, Tur, Moshe, Faraon, Andrei, & Willner, Alan E.. Orbital Angular Momentum-based Space Division Multiplexing for High-capacity Underwater Optical Communications. United States. doi:10.1038/srep33306.
Ren, Yongxiong, Li, Long, Wang, Zhe, Kamali, Seyedeh Mahsa, Arbabi, Ehsan, Arbabi, Amir, Zhao, Zhe, Xie, Guodong, Cao, Yinwen, Ahmed, Nisar, Yan, Yan, Liu, Cong, Willner, Asher J., Ashrafi, Solyman, Tur, Moshe, Faraon, Andrei, and Willner, Alan E.. 2016. "Orbital Angular Momentum-based Space Division Multiplexing for High-capacity Underwater Optical Communications". United States. doi:10.1038/srep33306.
@article{osti_1388483,
title = {Orbital Angular Momentum-based Space Division Multiplexing for High-capacity Underwater Optical Communications},
author = {Ren, Yongxiong and Li, Long and Wang, Zhe and Kamali, Seyedeh Mahsa and Arbabi, Ehsan and Arbabi, Amir and Zhao, Zhe and Xie, Guodong and Cao, Yinwen and Ahmed, Nisar and Yan, Yan and Liu, Cong and Willner, Asher J. and Ashrafi, Solyman and Tur, Moshe and Faraon, Andrei and Willner, Alan E.},
abstractNote = {},
doi = {10.1038/srep33306},
journal = {Scientific Reports},
number = 1,
volume = 6,
place = {United States},
year = 2016,
month = 9
}
  • To increase system capacity of underwater optical communications, we employ the spatial domain to simultaneously transmit multiple orthogonal spatial beams, each carrying an independent data channel. In this paper, we show up to a 40-Gbit/s link by multiplexing and transmitting four green orbital angular momentum (OAM) beams through a single aperture. Moreover, we investigate the degrading effects of scattering/turbidity, water current, and thermal gradient-induced turbulence, and we find that thermal gradients cause the most distortions and turbidity causes the most loss. We show systems results using two different data generation techniques, one at 1064 nm for 10-Gbit/s/beam and one atmore » 520 nm for 1-Gbit/s/beam; we use both techniques since present data-modulation technologies are faster for infrared (IR) than for green. For the 40-Gbit/s link, data is modulated in the IR, and OAM imprinting is performed in the green using a specially-designed metasurface phase mask. For the 4-Gbit/s link, a green laser diode is directly modulated. Lastly, we show that inter-channel crosstalk induced by thermal gradients can be mitigated using multi-channel equalisation processing.« less
  • A scheme to generate intense coherent light that carries orbital angular momentum (OAM) at the fundamental wavelength of an x-ray free-electron laser (FEL) is described. The OAM light is emitted as the dominant mode of the system until saturation provided that the helical microbunching imposed on the electron beam is larger than the shot-noise bunching that leads to self-amplified emission. Operating at the fundamental, this scheme is more efficient than alternate schemes that rely on harmonic emission, and can be applied to x-ray FELs without using external optical mode conversion elements.
  • The possible existence of half orbital angular momentum is studied in the context of an anisotropic microlocal space--time. It is shown that through l = 1/2 poses serious problems in an isotropic space, that is acceptable in an anisotropic space and is of relevance in determining the internal symmetry of hadrons. A crucial feature of l = 1/2 in such a space is that l/sub z/ is a conserved quantity and though L/sup 2/ is not a good operator, J/sup 2/ = (L+1/2/sup a/)/sup 2/ is an 0(3) invariant where -1/2(a x r) = ..mu.. is the measure of anisotropymore » given by the commutation of linear momentum components. It is pointed out that when the angular momentum operator is modified so that we have a 'conserved angular momentum' in this space, the system resembles the motion of a charged particle in the field of a magnetic monopole or a top motion. An oscillator representation of this formalism has been develo« less
  • Photons can carry spin angular momentum (SAM) and orbital angular momentum (OAM), which can be used to realize a qubit system and a high-dimension system, respectively. This spin-orbital system is very suitable for implementing one-dimensional discrete-time quantum random walks. We propose a simple scheme of quantum walks on the spin-orbital angular momentum space of photons, where photons walk on the infinite OAM space controlled by their SAM. By employing the recent invention of an optical device, the so-called 'q-plate', our scheme is more simple and efficient than others because there is no Mach-Zehnder interferometer in the scheme.