Conversion of topological charge of optical vortices in a parametric frequency converter

Berzanskis, A.; Matijosˇius, A.; Piskarskas, A.; Smilgevicˇius, Valerijus; Stabinis, A.

doi:10.1016/s0030-4018(97)00178-8

Cited by 99 publications

(24 citation statements)

References 15 publications

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“…In this case, the winding number of the LG pump modes must double, because of the azimuthal symmetry of the governing equations. In the general case of Type II phase-matching or frequency-mixing of single LG modes with winding numbers m j , j = 1, 2, 3, the symmetry of the equations leads to m 1 + m 2 = m 3 , as it is observed experimentally by Berzanskis, Matijosius, Piskarskas, Smilgevicius, and Stabinis [1997].…”

Section: Frequency Doubling With Vortex Beamsmentioning

confidence: 56%

Optical vortices and vortex solitons

2005

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Optical vortices are phase singularities nested in electromagnetic waves that constitute a fascinating source of phenomena in the physics of light and display deep similarities to their close relatives, quantized vortices in superfluids and Bose-Einstein condensates. We present a brief overview of the major advances in the study of optical vortices in different types of nonlinear media, with emphasis on the properties of vortex solitons. Self-focusing nonlinearity leads, in general, to the azimuthal instability of a vortex-carrying beam, but it can also support novel types of stable or meta-stable self-trapped beams carrying nonzero angular momentum, such as ring-like solitons, necklace beams, and soliton clusters. We describe vortex solitons created by multi-component beams, by parametrically coupled beams in quadratic nonlinear media, and in partially incoherent light, as well as discrete vortex solitons in periodic photonic lattices.

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Section: Frequency Doubling With Vortex Beamsmentioning

confidence: 56%

Optical vortices and vortex solitons

2005

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“…The spiral phase wavefront beam can be represented by using a phase function exp( ), and each photon can carry orbital angular momentum ℏ [1]. OAM can be used in photonic computer [2], quantum information processing [3][4][5], optical communication [6], and so forth. Especially for communication, OAM can be used as a new freedom degree of modulation/multiplexing to further increase the transmission capacity and capacity density [7].…”

Section: Introductionmentioning

confidence: 99%

Optical Orbital Angular Momentum Demultiplexing and Channel Equalization by Using Equalizing Dammann Vortex Grating

Liu

et al. 2017

Advances in Condensed Matter Physics

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A novel equalizing Dammann vortex grating (EDVG) is proposed as orbital angular momentum (OAM) multiplexer to realize OAM signal demultiplexing and channel equalization. The EDVG is designed by suppressing odd diffraction orders and adjusting the grating structure. The light intensity of diffraction is subsequently distributed evenly in the diffraction orders, and the total diffraction efficiency can be improved from 53.22% to 82%. By using the EDVG, OAM demultiplexing and channel equalization can be realized. Numerical simulation shows that the bit error rate (BER) of each OAM channel can decrease to 10 −4 when the bit SNR is 22 dB, and the intensity is distributed over the necessary order of diffraction evenly.

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“…Structured laser beams (SLBs) are playing an increasingly important role in various photonics applications, including ultrahigh resolution microscopy [1][2], optical micromanipulation and trapping [3][4][5], quantum information and cryptography [6][7], optical communications [8][9][10], optical metrology [11][12][13], non-linear processes [14][15], and photonics instrumentation [16][17][18]. Structured laser beam engineering requires highly coherent optical sources combined with the precise control of the beam's spatial characteristics, including the beam phase and amplitude.…”

Section: Introductionmentioning

confidence: 99%

Micro-optics packaging and integration for structured laser beam shaping

Soskind

2010

SPIE Proceedings

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Micro-optics packaging provides a practical and cost-effective approach for controlling the spatial field distributions of structured laser beams in a variety of photonics applications. Structured laser beams (SLBs) are playing an increasingly important role in ultrahigh resolution microscopy, biophotonics, optical micromanipulation and trapping, laser pumping, materials processing and microfabrication, quantum information, and optical communications. It is shown that the limited aperture sizes, as well as the distortions introduced by micro-optics components during the integration phase, may influence field formation of the structured laser beams, and may alter their spatial characteristics. To avoid the undesirable changes to the field shape of the structured beams during micro-optics design and packaging phases, detailed analysis of the beam propagation characteristics along the optical path is required.

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Conversion of topological charge of optical vortices in a parametric frequency converter

Cited by 99 publications

References 15 publications

Optical vortices and vortex solitons

Optical vortices and vortex solitons

Optical Orbital Angular Momentum Demultiplexing and Channel Equalization by Using Equalizing Dammann Vortex Grating

Micro-optics packaging and integration for structured laser beam shaping

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