Journal ArticleDOI
Generation of highly pure lower-order Laguerre–Gaussian radial beams using an all-fiber multimode interference method
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TLDR
In this article, the output beam exiting from the end facet of a single-mode-multimode-few-mode device can be designed to be a highly pure LG00 or LG10 mode.Abstract:
We show that the output beam exiting from the end facet of a single-mode–multimode–few-mode device can be designed to be a highly pure LG00 or LG10 mode. Our investigation provides a method to generate LG beams in free space using a low-cost, all-fiber solution that also shows potential for an integrated device.read more
Citations
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Proceedings ArticleDOI
Multimode Interference based All-Fiber Selective Mode Launcher for Few Mode Fiber Applications
TL;DR: In this paper, the authors demonstrate an all-fiber multimode interference device for achieving controlled and repeatable mode launching condition in a few mode fiber, which is easy to design, quick to customize, and require bare minimum equipments for fabrication.
Journal ArticleDOI
Laguerre-Gaussian Expansion of Step-Index Multimode Fiber Beams in Free-Space
TL;DR: In this paper , the complex conjugate of the overlap integrals between the fiber end-facet field and the Laguerre-Gaussian modes provides the expansion coefficients for the step-index multimode fiber beams.
Laguerre-Gaussian Expansion of Step-Index Multimode Fiber Beams in Free-Space
TL;DR: In this article , the complex conjugate of the overlap integrals between the fiber end-facet field and the Laguerre-Gaussian modes provides the expansion coefficients for the step-index multimode fiber beams.
References
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Journal ArticleDOI
Orbital angular momentum of light and the transformation of Laguerre-Gaussian laser modes.
TL;DR: Laser light with a Laguerre-Gaussian amplitude distribution is found to have a well-defined orbital angular momentum and an astigmatic optical system may be used to transform a high-order LaguERre- Gaussian mode into aHigh-order Hermite-Gaussia mode reversibly.
Journal ArticleDOI
Diffraction-free beams.
TL;DR: The first experimental investigation of nondiffracting beams, with beam spots as small as a few wavelengths, can exist and propagate in free space, is reported.
Journal ArticleDOI
Free-space information transfer using light beams carrying orbital angular momentum
Graham M. Gibson,Johannes Courtial,Miles J. Padgett,Mikhail V. Vasnetsov,V. A. Pas’ko,Stephen M. Barnett,Sonja Franke-Arnold +6 more
TL;DR: The transfer of information encoded as orbital angular momentum states of a light beam is demonstrated, which is resistant to eavesdropping and gives an experimental insight into the effects of aperturing and misalignment of the beam on the OAM measurement and demonstrates the uncertainty relationship for OAM.
Journal ArticleDOI
Optical communications using orbital angular momentum beams
Alan E. Willner,Hao Huang,Yan Yan,Yongxiong Ren,Nisar Ahmed,Guodong Xie,Changjing Bao,Long Li,Yinwen Cao,Zhe Zhao,Jian Wang,Martin P. J. Lavery,Moshe Tur,Siddharth Ramachandran,Andreas F. Molisch,Nima Ashrafi,Solyman Ashrafi +16 more
TL;DR: In this article, the authors review recent progress in OAM beam generation/detection, multiplexing/demultiplexing, and its potential applications in different scenarios including free-space optical communications, fiber-optic communications, and RF communications.