Control of orbital angular momentum of light with optical fibers

Bozinovic, Nenad; Golowich, Steven E.; Kristensen, Poul; Ramachandran, Siddharth

doi:10.1364/ol.37.002451

Cited by 237 publications

(103 citation statements)

References 17 publications

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“…"-") vortex states dramatically reducing the number of interference terms that must be analysed to deduce mode purity. Figure 8 shows the experimental setup that we used to control and analyse the OAM states of a vortex fiber [48]. Using standard single mode fiber (SMF), a 50-nmwide 1550-nm LED, and a narrowband CW tunable laser (Agilent 8168F) were multiplexed into a 20-m-long vortex fiber.…”

Section: The "Ring" Technique -Spatial Domain Characterizationmentioning

confidence: 99%

Optical vortices in fiber

Ramachandran

Kristensen²

2013

Nanophotonics

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398

150

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Optical vortex beams, possessing spatial polarization or phase singularities, have intriguing properties such as the ability to yield super-resolved spots under focussing, and the ability to carry orbital angular momentum that can impart torque to objects. In this review, we discuss the means by which optical fibers, hitherto considered unsuitable for stably supporting optical vortices, may be used to generate and propagate such exotic beams. We discuss the multitude of applications in which a new class of fibers that stably supports vortices may be used, and review recent experiments and demonstration conducted with such fibers.

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Section: The "Ring" Technique -Spatial Domain Characterizationmentioning

confidence: 99%

Optical vortices in fiber

Ramachandran

Kristensen²

2013

Nanophotonics

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398

150

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“…A variety of OAM fibers have been proposed with either solid [8]- [10] or hollow cores [11], [12]. Most of them feature a ring-shaped refractive index profile and a large index contrast between the core and cladding.…”

Section: Introductionmentioning

confidence: 99%

Orbital-Angular-Momentum Polarization Mode Dispersion in Optical Fibers

Wang

Vaity

Châtigny

et al. 2016

J. Lightwave Technol.

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“…The considered discrete optical vortices also have the potential for high power field trapping and transfer in MCF, which provides a method to manage and control the nonlinearity and to design new type of switches 59 , sources of high brightness coherent radiation or uniform light sources with tailored phase profiles. Moreover, an intriguing extension of this work is to generate and manage spatiotemporal vortex light bullets in MCF settings [46][47][48][49] . …”

Section: Discussionmentioning

confidence: 99%

Stable optical vortices in nonlinear multicore fibers

et al. 2015

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The multicore fiber (MCF) is a physical system of high practical importance. In addition to standard exploitation, MCFs may support discrete vortices that carry orbital angular momentum suitable for spatial-division multiplexing in high-capacity fiber-optic communication systems. These discrete vortices may also be attractive for high-power laser applications. We present the conditions of existence, stability, and coherent propagation of such optical vortices for two practical MCF designs. Through optimization, we found stable discrete vortices that were capable of transferring high coherent power through the MCF. Keywords: coherent energy propagation; multicore fibers; nonlinear vortices INTRODUCTION Vortex structures are widespread in nature and are found in both macroscopic atmospheric phenomena, such as tornadoes and the Great Red Spot of Jupiter, and microscopic-scale objects in quantum physics. Mathematically, vortices are related to topological defects, the accumulation of geometrical phases, and the phase singularity of a complex linear or nonlinear field (see, e.g., Refs. 1-8 and references therein).Optical vortices present a fascinating and expanding area of research that combines fundamental theoretical and mathematical science and maturing applied technologies (see recent review 4 ). Optical vortices are characterized by a wave field with zero intensity, an undefined phase in the vortex center (pivot point) and the presence of a screw dislocation of the wave front 5,6 . All transmutations of vortices in linear and nonlinear fields obey the conservation of the topological charge S, which is defined as the total change of the phase along a closed curve surrounding the pivotal point of the vortex divided by 2p. The special behavior of the phase and amplitude near the vortex pivot point results in the circular flow of energy in optical vortices [7][8][9][10] . This property is closely related to the ability of optical vortices to carry orbital angular momentum and energy [11][12][13][14] . This property is interesting for various applications, such as in optical traps [15][16][17] , information transmission 18-20 , astrophysics 21,22 , microscopy 23,24 , and laser micromachining 25,26 .In nonlinear media, optical vortices are treated as (topological) vortex solitons 4,27,28 . Such topologically stable pulses can act as information carriers 4,[29][30][31] . It is important that continuum vortex solitons are highly sensitive to azimuthal instability. Stabilization is possible by applying optically induced photonic lattices, which lead to a discrete optical vortex field. Different types of discrete lattice vortex solitons were theoretically predicted in the Refs. 32-35 and experimentally demonstrated in the Refs. 36,37. Discrete vortex solitons can also be created in photonic crystal fibers and other types of photonic lattices 38,39 . Discrete vortex solitons are frequently associated with soliton clusters, which feature interesting mobility properties and

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Control of orbital angular momentum of light with optical fibers

Cited by 237 publications

References 17 publications

Optical vortices in fiber

Optical vortices in fiber

Orbital-Angular-Momentum Polarization Mode Dispersion in Optical Fibers

Stable optical vortices in nonlinear multicore fibers

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