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Liu A, Li Z, Zou CL, She J, Wang Q, Ren X. Polarization-insensitive vortex beam generator by the holographic grating on an integrated multi-layer waveguide. OPTICS LETTERS 2024; 49:97-100. [PMID: 38134163 DOI: 10.1364/ol.510235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 11/22/2023] [Indexed: 12/24/2023]
Abstract
An integrated polarization-insensitive vortex beam generator is proposed in this study. It is composed of a holographic grating on a multi-layer waveguide, which enables conversion of Transverse Electric (TE) and Transverse Magnetic (TM) waveguide modes to y-polarized and x-polarized optical vortex beams, respectively. The conversion efficiency and the phase fidelity are numerically analyzed, and the working bandwidth is about 100 nm from 1500 nm to 1600 nm with a phase fidelity above 0.7. Moreover, the vortex beam with the superposition of the y-polarization and x-polarization states can be obtained with the incident of the superposition of TE and TM waveguide modes.
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Song H, Zhou H, Zou K, Zhang R, Pang K, Song H, Minoofar A, Su X, Hu N, Liu C, Bock R, Zach S, Tur M, Willner AE. Demonstration of generating a 100 Gbit/s orbital-angular-momentum beam with a tunable mode order over a range of wavelengths using an integrated broadband pixel-array structure. OPTICS LETTERS 2021; 46:4765-4768. [PMID: 34598194 DOI: 10.1364/ol.435725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 08/26/2021] [Indexed: 06/13/2023]
Abstract
We experimentally generate an orbital-angular-momentum (OAM) beam with a tunable mode order over a range of wavelengths utilizing an integrated broadband pixel-array OAM emitter. The emitter is composed of a 3-to-4 coupler, four phase controllers, and a mode convertor. An optical input is split into four waveguides by the coupler. Subsequently, the four waveguide fields are coherently combined and transformed into a free-space OAM beam by the mode convertor. By tuning the phase delay Δφ between the four waveguides using the integrated phase controllers, the OAM order of the generated beam could be changed. Our results show that (a) a single OAM beam with a tunable OAM order (ℓ=-1 or ℓ=+1) is generated with the intermodal power coupling of <-11dB, and (b) in a wavelength range of 6.4 nm, a free-space link of a single 50 Gbaud quadrature-phase-shift-keying (QPSK) channel carried by the tunable OAM beam is achieved with a bit error rate below the forward-error-correction threshold. As proof of concept, a 400 Gbit/s OAM-multiplexed and WDM QPSK link is demonstrated with a ∼1-dB OSNR penalty compared with a single-beam link.
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Fatkhiev DM, Butt MA, Grakhova EP, Kutluyarov RV, Stepanov IV, Kazanskiy NL, Khonina SN, Lyubopytov VS, Sultanov AK. Recent Advances in Generation and Detection of Orbital Angular Momentum Optical Beams-A Review. SENSORS (BASEL, SWITZERLAND) 2021; 21:4988. [PMID: 34372226 PMCID: PMC8347071 DOI: 10.3390/s21154988] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 07/17/2021] [Accepted: 07/20/2021] [Indexed: 01/20/2023]
Abstract
Herein, we have discussed three major methods which have been generally employed for the generation of optical beams with orbital angular momentum (OAM). These methods include the practice of diffractive optics elements (DOEs), metasurfaces (MSs), and photonic integrated circuits (PICs) for the production of in-plane and out-of-plane OAM. This topic has been significantly evolved as a result; these three methods have been further implemented efficiently by different novel approaches which are discussed as well. Furthermore, development in the OAM detection techniques has also been presented. We have tried our best to bring novel and up-to-date information to the readers on this interesting and widely investigated topic.
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Affiliation(s)
- Denis M. Fatkhiev
- Telecommunication Systems Department, Ufa State Aviation Technical University, 450008 Ufa, Russia; (E.P.G.); (R.V.K.); (I.V.S.); (A.K.S.)
| | - Muhammad A. Butt
- Department of Technical Cybernetics, Samara National Research University, 443086 Samara, Russia; (M.A.B.); (N.L.K.); (S.N.K.)
- Institute of Microelectronics and Optoelectronics, Warsaw University of Technology, 00-662 Warszawa, Poland
| | - Elizaveta P. Grakhova
- Telecommunication Systems Department, Ufa State Aviation Technical University, 450008 Ufa, Russia; (E.P.G.); (R.V.K.); (I.V.S.); (A.K.S.)
| | - Ruslan V. Kutluyarov
- Telecommunication Systems Department, Ufa State Aviation Technical University, 450008 Ufa, Russia; (E.P.G.); (R.V.K.); (I.V.S.); (A.K.S.)
| | - Ivan V. Stepanov
- Telecommunication Systems Department, Ufa State Aviation Technical University, 450008 Ufa, Russia; (E.P.G.); (R.V.K.); (I.V.S.); (A.K.S.)
| | - Nikolay L. Kazanskiy
- Department of Technical Cybernetics, Samara National Research University, 443086 Samara, Russia; (M.A.B.); (N.L.K.); (S.N.K.)
- Image Processing Systems Institute Branch of the Federal Scientific Research Center “Crystallography and Photonics” of Russian Academy of Sciences, 443001 Samara, Russia
| | - Svetlana N. Khonina
- Department of Technical Cybernetics, Samara National Research University, 443086 Samara, Russia; (M.A.B.); (N.L.K.); (S.N.K.)
- Image Processing Systems Institute Branch of the Federal Scientific Research Center “Crystallography and Photonics” of Russian Academy of Sciences, 443001 Samara, Russia
| | - Vladimir S. Lyubopytov
- Telecommunication Systems Department, Ufa State Aviation Technical University, 450008 Ufa, Russia; (E.P.G.); (R.V.K.); (I.V.S.); (A.K.S.)
- Center for Photonics and Quantum Materials, Skolkovo Institute of Science and Technology, 121205 Moscow, Russia;
| | - Albert K. Sultanov
- Telecommunication Systems Department, Ufa State Aviation Technical University, 450008 Ufa, Russia; (E.P.G.); (R.V.K.); (I.V.S.); (A.K.S.)
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