An All Optics Fiber Generator of the Orbital Angular Momentum Beam

Abstract

Light waves with orbital angular momentum (OAM) can be applied in the mode division multiplexing technology, which offers a new way to enlarge the communication capacity from another dimension. The generation of the OAM is the key of this technology. Based on the effective medium theory, we designed a special structure at the end of the optical fiber: vortex structures which make the effective refractive index increases clockwise or counter-clockwise. When the incident light goes through this structure, the different refractive index will cause the different optical path and the corresponding phase delay alone the azimuthal angle, i.e. the OAM light. The above OAM generation process is simulated using an FDTD software.

Keywords:

orbital angular momentum of light, the effective medium theory, FDTD

References

[1]L. Allen, M. W. Beijersbergen, R. J. C. Spreeuw, and J. P. Woerdman.Orbital angular-momentum of light and the transformation ofLaguerre–Gaussian laser modes[J].Phys. Rev. A, 1992, 45:8185-8189
[2] Graham Gibson, Johannes Courtial, Miles J.Padgett.Free-space information transfer usinglight beams carrying orbital angular momentum[J].Optics Express, 2004, 12(22):5448-5456
[3]Oliver Graydon, Alan Willner.A new twist for communications[J].Nature Photonics, 2012, 6:498-498
[4] Jian Wang, Jeng-Yuan Yang, Irfan M. Fazal, Nisar Ahmed, Yan Yan, Hao Huang, Yongxiong Ren, Yang Yue, Samuel Dolinar, Moshe Tur and Alan E. Willner.Terabit free-space data transmission employing orbital angular momentum multiplexing[J].Nature Photonics, 2012, 6:488-496
[5]Nenad Bozinovic, Poul Kristensen, Siddharth Ramachandran.Long-range fiber-transmission of photons with orbital angular momentum[J].CLEO, 2011, :-
[6]Toshio Morioka, Yoshinari Awaji, Roland Ryf, Peter Winzer, David Richardson and Francesco Poletti, .Enhancing optical communications with brand new fibers[J].Communications Magazine, IEEE, 2012, 50(2):31-42
[7]Yoshinari Awaji, Naoya Wada, and Yasunori Toda.Observation of Orbital Angular Momentum Spectrum in Propagating Mode through Seven-core Fibers[J].CLEO, 2012, :-
[8]Alison M. Yao and Miles J. Padgett.Orbital angular momentum: origins, behavior and applications[J].Advances in Optics and Photonics, 2011, 3(2):161-204
[9]J. Courtial and M.J. Padgett.Performance of a cylindrical lens mode converter for producing Laguerre–Gaussian laser modes[J].Optics Communications, 1999, 159(1-3):13-18
[10]N.R. Heckenberg, R. McDuff, C. P. Smith, and A. G. White.Generation of optical phase singularities by computer-generated holograms[J].Optics Letters, 1992, 17(3):221-223
[11]E.Karimi, Bruno Piccirillo, Eleonora Nagali, Lorenzo Marrucci, Enrico Santamato.Efficient generation and sorting of orbital angular momentum eigenmodes of light by thermally tuned q-plates[J].Applied Physics Letters, 2009, 94(23):-

An All Optics Fiber Generator of the Orbital Angular Momentum Beam

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