Showing 1-25 of 2,241 resultsfor "Index Terms":optical vortices
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High-Energy Nanosecond Optical Vortex Output From Nd:YAG Amplifiers
Xudong Chen;Chengcheng Chang;Zhili Lin;Panfeng Ding;Jixiong Pu
IEEE Photonics Technology Letters
Cited by: Papers (11)
Optical vortex amplification up to the joule level using flash-lamp-pumped Nd:YAG amplifiers has been demonstrated for the first time. In experiment, vortex seed pulses were converted from a conventional Q-switched Nd:YAG laser output by a spiral phase plate and amplified with two Nd:YAG amplifier stages. A maximum output energy of optical vortex up to 995 mJ has been achieved at 10 Hz in a 10-ns ...Show More
Generation of optical vortices via induced by acousto-optic interaction helical fiber grating
Dmitriy Vikulin;Elena Barshak;Boris Lapin;Constantine Alexeyev;Maxim Yavorsky
2020 International Conference on Information Technology and Nanotechnology (ITNT)
Year: 2020 | Conference Paper |
We consider the light propagation in circular optical fibers with a higher-order flexural sound wave. The analytical expressions for fiber eigenstates and the corresponding propagation constant are obtained by applying the resonance perturbation theory to the wave equation and thoroughly analyzed. It is shown that the acosucto-optic interaction in the problem induces two travelling long-period hel...Show More
All-fiber spin-dependent optical vortex generation via flexural acoustic wave
Dmitriy Vikulin;Elena Barshak;Boris Lapin;Anna Enina;Constantin Alexeyev;Maxim Yavorsky
2021 International Conference on Information Technology and Nanotechnology (ITNT)
Year: 2021 | Conference Paper |
In this paper we have studied the light propagation in ideal optical fibers endowed with a propagating flexural acoustic mode of linear polarization. Using the perturbation theory approach, we have obtained the analytical expressions for optical fiber modes and the corresponding propagation constants taking into account acoustically-induced stress. We show the all-fiber spin-dependent generation o...Show More
Diffractive optics for OAM-mode division multiplexing of optical vortices Design, fabrication and optical characterization
2016 IEEE 7th International Conference on Advanced Optoelectronics and Lasers (CAOL)
Year: 2016 | Conference Paper |
Cited by: Papers (2)
The design and fabrication of compact phase-only diffractive optical elements (DOE) are considered for the (de)multiplexing of beams carrying orbital angular momentum (OAM) of light. Samples have been fabricated with high-resolution electron-beam lithography on polymethylmethacrylate (PMMA) resist layer spun over a glass substrate and the high quality has been inspected with scanning electron micr...Show More
Active Quasi-BIC Enabled Optical Vortex Generation
Yuhao Wu;Lei Kang;Sawyer. D. Campbell;Pingjuan. L. Werner;Douglas. H. Werner
2023 International Applied Computational Electromagnetics Society Symposium (ACES)
Year: 2023 | Conference Paper |
Electromagnetic beams that carry orbital angular momentum (OAM) have enormous potential in various applications. By exploiting the winding topology of quasi-BIC modes around the polarization singularity in $k$-space, a novel optical vortex (OV) generation method has been recently proposed. Compared with the conventional approaches, this method can lead to robust OV generators which are feasible an...Show More
Free-Space Optical Communication with Finite Acceptance Aperture Using Concentric Perfect Optical Vortex
2021 2nd Information Communication Technologies Conference (ICTC)
Year: 2021 | Conference Paper |
The paper simulate a free-space optical communication using concentric perfect optical vortex (CPOV) beam for data transmission, where the CPOV beam is generated by loading a spatial light modulator with perfect optical vortex (POV) phases of different radii, and the CPOV beam is detected through the modified Mach-Zehnder interferometer (MZI) consisting of the standardized MZI, a Dove Prism (DP) a...Show More
Generation of Optical Vortex Array by the Quasi-Talbot Effect With All-Dielectric Metasurface
Guangzhou Geng;Zhancheng Li;Wei Zhu;Ruhao Pan;Wenwei Liu;Hua Cheng;Wenyuan Zhou;Junjie Li;Jianguo Tian;Shuqi Chen
In this letter, we numerically and experimentally demonstrate the highly efficient generation of optical vortex arrays based on the quasi-Talbot effect with a reflective all-dielectric metasurface, which is composed of six identical orbital angular momentum lenses. Six separated and focused optical vortices at the focal plane can be high efficiently generated, and form a vortex array at the defocu...Show More
Vortex-Generating Light-Induced Phase Converter in Azobenzene Polymer
2024 International Conference Laser Optics (ICLO)
Year: 2024 | Conference Paper |
The formation of the modified area, which acts as phase converter for vortex generation, in the amorphous thin layer of the azo-containing polymer under the action of structured light beam is considered. The optical axes are produced in accordance with the polarization structure of the pump light beam. The beam with radial polarization induces the axially-symmetric optical axis distribution (simil...Show More
Experimental observation of optical bistability in an integrated vortex beam emitter
Jian Wang;Jun Liu;Shimao Li;Charalambos Klitis;Marc Sorel;Siyuan Yu;Xinlun Cai
2017 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)
Year: 2017 | Conference Paper |
We experimentally demonstrate an interesting phenomenon of optical bistability in an integrated optical vortex emitter when injecting high power into the waveguide due to the nonlinear optical effects. We clearly observe a hysteresis loop of the radiation power from the integrated vortex beam emitter when increasing and decreasing the input power.Show More
We model the effect of the off-axis distance of edge dislocation on the transmission of mixed higher order optical vortex-edge dislocations in atmospheric turbulence. We find that when mixed dislocations beams propagate through atmospheric turbulence, the higher order optical vortex will break down, and the topological charge is conserved in the process; an edge dislocation evolves into a pair of ...Show More
Control of Optical Vortices via Parametric Optical Effects
2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL)
Year: 2019 | Conference Paper |
Cited by: Papers (1)
We demonstrate that there are promising possibilities for generating singular beams that bear optical vortices with the aid of parametric optical effects. These effects can arise in single crystals subjected to inhomogeneous mechanical stresses and electric fields. Another technique is acousto-optic or acousto-gyration interactions in single crystals. We reveal the resources for controlling the ef...Show More
Perfect Optical Vortex Beam for Optical Communication
2020 IEEE MTT-S International Wireless Symposium (IWS)
Year: 2020 | Conference Paper |
Concentric perfect optical vortex beam(CPOV) is a significant light field which pay much attention. Here, we demonstrate the CPOV beam be used in Free-space optical communications, which can increase capacity at finite aperture. The result shows the CPOV beam could be decoded simply via the conjugate beam interference method. Moreover, we design a communication system and realize the transmission ...Show More
Forked Grating Coupler Optical Vortex beam interface for silicon photonics
Christopher T. Nadovich;Derek J. Kosciolek;William D. Jemison;David T. Crouse
The Forked Grating Coupler (FGC) is a novel silicon photonics device that can interface with Optical Vortex (OV) light beams. The FGC combines the idea of an apodized Bragg grating coupler with a forked hologram, creating a device that can efficiently couple selected OV modes at near-normal incidence into confined dielectric waveguide modes of a photonic IC. FGCs retain many of the advantages of g...Show More
Inverse-designed Optical Vortex Beam Emitters
2021 Conference on Lasers and Electro-Optics (CLEO)
Year: 2021 | Conference Paper |
Evolution of optical vortices from deterministic to random fields
2022 Conference on Lasers and Electro-Optics (CLEO)
Year: 2022 | Conference Paper |
Light-Induced Waveguides in Nematic Liquid Crystals
Spatial optical solitary waves in media with nonlinear refractive index are self-localized beams as well as waveguides induced by light. We review their guiding features in reorientational birefringent soft matter, namely nematic liquid crystals, for which a highly “nonlocal” response enhances the confinement, stabilization, and robustness of the generated optical solitary waves, termed “nematicon...Show More
3D Speckle Intensity Correlations in Propagation of Optical Vortex Beams
2021 Conference on Lasers and Electro-Optics (CLEO)
Year: 2021 | Conference Paper |
Generation and detection of multiple coaxial vortex beams for free-space optical communications
2012 Conference on Lasers and Electro-Optics (CLEO)
Year: 2012 | Conference Paper |
Cited by: Papers (1)
Generation of Optical Vortices Using a Helical Fiber Bragg Grating
Zhongxi Lin;Anting Wang;Lixin Xu;Xiaoqiang Zhang;Biao Sun;Chun Gu;Hai Ming
Journal of Lightwave Technology
Cited by: Papers (42)
We present an effective method to generate optical vortices (OVs) by using a helical fiber Bragg grating (H-FBG) written directly on the few-mode fiber. The helical index modulation is obtained by rotating fiber during single-side UV exposure using a phase mask. A set of coupled-mode equations are formulated to analysis reflection characteristics of the H-FBG. We propose that stable OVs can be ach...Show More
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