Journal ArticleDOI
Collinear superposition of multiple helical beams generated by a single azimuthally modulated phase-only element
TLDR
This work proposes a highly efficient approach to generating multihelix beams that contain more than one helical mode, and the power distribution over helical modes is adjustable.Abstract:
We propose a highly efficient approach to generating multihelix beams that contain more than one helical mode, and the power distribution over helical modes is adjustable. A multihelix beam embedded with three collinear helical modes is demonstrated by use of a spatial light modulator.read more
Citations
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Journal ArticleDOI
High-volume optical vortex multiplexing and de-multiplexing for free-space optical communication
TL;DR: In the encoding process, conventional algorithm employed for the generation of collinearly superimposed OVs is combined with a genetic algorithm to achieve high-volume OV multiplexing to increase the number of signal channels in free-space optical communication.
Journal ArticleDOI
Orbital angular momentum complex spectrum analyzer for vortex light based on the rotational Doppler effect.
TL;DR: In this article, the authors proposed an OAM complex spectrum analyzer that enables simultaneous measurements of the power and phase distributions of OAM modes by employing the rotational Doppler effect.
Journal ArticleDOI
Generation of multiple Bessel beams for a biophotonics workstation
Tomáš Čižmár,Věra Kollárová,X. Tsampoula,Frank J. Gunn-Moore,Wilson Sibbett,Zdeněk Bouchal,Kishan Dholakia +6 more
TL;DR: Overall this concept is termed a 'biophotonics workstation' where users may readily trap, sort and porate material using Bessel light modes in a microscope.
Journal ArticleDOI
Optical implementation of the vortex information channel
Radek Čelechovský,Zdeněk Bouchal +1 more
TL;DR: In this article, an advanced optical set-up utilizing vortices for transfer of information is proposed and experimentally verified, based on a sophisticated design of phase-only masks enabling information encoding and decoding.
Journal ArticleDOI
Poynting vector and orbital angular momentum density of superpositions of Bessel beams
TL;DR: The theory is demonstrated by creating superpositions of non-diffracting Bessel beams with digital holograms, and it is found that the OAM distribution in the superposition field matches the predicted values.
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
Entanglement of the orbital angular momentum states of photons
TL;DR: This work demonstrates entanglement involving the spatial modes of the electromagnetic field carrying orbital angular momentum, which provides a practical route to entangled states that involves many orthogonal quantum states, rather than just two Multi-dimensional entangled states could be of considerable importance in the field of quantum information, enabling, for example, more efficient use of communication channels in quantum cryptography.
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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
Entanglement of Orbital Angular Momentum States of Photons
TL;DR: In this article, the orbital angular momentum of photons is exploited to achieve multi-dimensional entanglement in higher dimensions, i.e., the state of the electromagnetic field with phase singularities (doughnut modes).
Journal ArticleDOI
Direct Observation of Transfer of Angular Momentum to Absorptive Particles from a Laser Beam with a Phase Singularity
TL;DR: Black or reflective particles can be trapped in the dark central minimum of a doughnut laser beam produced using a high efficiency computer generated hologram to carry angular momentum transferred from the central phase singularity beam.