Journal ArticleDOI
Tunable orbital angular momentum generation in optical fibers.
TLDR
The smooth variation of OAM from l=-1 to l=+1 by adjusting a polarizer at the output end of the fiber is experimentally demonstrated.Abstract:
We present a method in this Letter to generate optical vortices with tunable orbital angular momentum (OAM) in optical fibers. The tunable OAM optical vortex is produced by combining different vector modes HE2,meven (HE2,modd) and TE0,m (TM0,m) when l=1 or combining HEl+1,meven (HEl+1,modd) and EHl-1,modd (EHl-1,meven) when l>1 with a π/2 phase shift. The vortex can be regarded as a result of overlapping two orthogonal optical vortex beams of equal helicity but opposite chirality with a π/2 phase shift. We have experimentally demonstrated the smooth variation of OAM from l=-1 to l=+1 by adjusting a polarizer at the output end of the fiber.read more
Citations
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Journal ArticleDOI
Generation of Femtosecond Optical Vortex Beams in All-Fiber Mode-Locked Fiber Laser Using Mode Selective Coupler
TL;DR: In this article, a high-order optical vortex pulsed laser based on a mode selective all-fiber fused coupler composed of a singlemode fiber and a few-mode fiber (FMF) was demonstrated.
Journal ArticleDOI
Controllable all-fiber generation/conversion of circularly polarized orbital angular momentum beams using long period fiber gratings
TL;DR: In this article, a long period fiber grating (LPFG) system is proposed to realize mode conversions between the higher-order LP core modes in four-mode fiber, which can be potentially used as a controllable higher order OAM beam switch and a physical layer of the translating protocol from the conventional LP modes communication to the OAM modes communication in the future mode carrier telecommunication system and light calculation protocols.
Journal ArticleDOI
Single mode fiber based delivery of OAM light by 3D direct laser writing
TL;DR: In this paper, the authors demonstrate orbital-angular momentum (OAM) light up to a topological charge of l = 3 behind a single mode optical fiber and demonstrate far field intensity patterns and interferograms of the OAM beams using a CCD camera.
Journal ArticleDOI
Tunable Orbital Angular Momentum Generation Using All-Fiber Fused Coupler
TL;DR: In this article, the authors proposed an effective approach to generate tunable orbital angular momentum (OAM) beam based on all-fiber fused coupler consisting of a single mode fiber (SMF) and a two-mode fiber.
Journal ArticleDOI
Generation of Orbital Angular Momentum Modes Using Fiber Systems
TL;DR: In this paper, the basic concepts of fiber modes and the generation and detection theories of OAM modes are introduced, including the long-period fiber grating, the mode-selective coupler, microstructural optical fiber, and the photonic lantern.
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
Orbital angular momentum: origins, behavior and applications
Alison M. Yao,Miles J. Padgett +1 more
TL;DR: In this paper, it was shown that if every polarization vector rotates, the light has spin; if the phase structure rotates and if a light has orbital angular momentum (OAM), the light can be many times greater than the spin.
Journal ArticleDOI
Terabit-Scale Orbital Angular Momentum Mode Division Multiplexing in Fibers
Nenad Bozinovic,Yang Yue,Yongxiong Ren,Moshe Tur,Poul Kristensen,Hao Huang,Alan E. Willner,Siddharth Ramachandran +7 more
TL;DR: The viability of using the orbital angular momentum (OAM) of light to create orthogonal, spatially distinct streams of data-transmitting channels that are multiplexed in a single fiber is demonstrated and suggest that OAM could provide an additional degree of freedom for data multiplexing in future fiber networks.
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 spin-to-orbital angular momentum conversion in inhomogeneous anisotropic media
TL;DR: An optical process in which the spin angular momentum carried by a circularly polarized light beam is converted into orbital angular momentum, leading to the generation of helical modes with a wave-front helicity controlled by the input polarization is demonstrated.