Orbital angular momentum vector modes (de)multiplexer based on multimode micro-ring

Li, Shimao; Nong, Zhichao; Wu, Xiong; Yu, Wen Liang; He, Mingbo; Klitis, Charalambos; Zhu, Yuntao; Gao, Shengqian; Liu, Jie; Li, Zhaohui; Liu, Liu; Sorel, Marc; Yu, Siyuan; Cai, Xinlun

doi:10.1364/oe.26.029895

Cited by 27 publications

(9 citation statements)

References 33 publications

(41 reference statements)

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“…To potentially increase the number of multiplexed OAM beams in the THz MDM systems, designing and utilizing a single compact device that can generate/detect and (de)multiplex multiple data-carrying OAM beams can be considered. Various structures and devices have been demonstrated in optical and mm-wave regimes for multiple OAM channels generation and multiplexing [12,89,93,94], which might potentially inspire the designs for the THz region.…”

Section: Summary and Discussionmentioning

confidence: 99%

High capacity terahertz communication systems based on multiple orbital-angular-momentum beams

Willner

Su²,

Zhou³

et al. 2022

J. Opt.

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Structured electromagnetic (EM) waves carrying orbital angular momentum (OAM) have been explored in various frequency regimes to enhance the data capacity of communication systems by multiplexing multiple co-propagating orthogonal OAM beams (i.e., mode-division multiplexing (MDM)). Terahertz (THz) communications in free space have gained interest as THz waves tend to have: (a) larger bandwidth and lower beam divergence than millimeter-waves, and (b) lower interaction with matter conditions than optical waves. In this paper, we review recent experimental demonstrations of OAM-based THz MDM communication systems, including (i) THz MDM system with two multiplexed OAM beams; (ii) THz OAM multiplexing together with frequency-division-multiplexing (FDM) and polarization-division-multiplexing (PDM); (iii) multiplexing a full set of two-dimensional Laguerre-Gaussian (LG_(l,p)) beams; and (iv) THz integrated OAM emitter for OAM mode generation and multiplexing. System performance of THz OAM links with the effect of turbulence, divergence, and multipath is also simulated and analyzed.

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Section: Summary and Discussionmentioning

confidence: 99%

High capacity terahertz communication systems based on multiple orbital-angular-momentum beams

Willner

Su²,

Zhou³

et al. 2022

J. Opt.

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“…In this manner, integrated micro SPPs and two-dimensional fiber-gratings placed at the output port of a single-mode 860 nm vertical-cavity surface-emitting laser (VCSEL) were utilized in [ 65 ] and [ 156 ], respectively. This approach has shown robustness and high purity of the generated OAM states, allowing OAM multiplexed data transmission [ 157 , 158 ]. Fabrication of a broadly wavelength tunable MEMS-based Fabry-Perot filter with the sized SPP placed on the filter aperture has been proposed in the papers with our contribution [ 159 , 160 ].…”

Section: Oam Beams Generation With Photonic Integrated Circuitsmentioning

confidence: 99%

Recent Advances in Generation and Detection of Orbital Angular Momentum Optical Beams—A Review

Fatkhiev

Butt

Grakhova

et al. 2021

Sensors

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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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“…The main drawback of these devices is the heavy and complicated design and the relatively large footprint. Another approach is based on the light coupling between whispering gallery modes and freespace OVs [20,21]. The structure is compact and the generated phase is accurate.…”

Section: Introductionmentioning

confidence: 99%

On-Chip Optical Vortex Generation and Topological Charge Control by Methods of Wave Vector Manipulation

Liu

et al. 2022

IEEE Photonics J.

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Optical vortices (OVs) have received much attention in recent years and are widely explored in communication applications. The on-chip vortex emitter/modulator is preferred when it comes to photonic integration and chip-scale communication. However, the existing emitters/modulators suffer from either narrow bandwidths or extensibility problems, which actually degrade their ability to improve communication capacity. Here, we propose a metasurface OV emitter based on wave vector synthesis for vortex generation and modulation. A thorough theoretical analysis of the OV generation by two approximate methods was carried out, which suggests the superiority of Wave Vector method over Phase method. Afterwards, the wave vector manipulation implemented by Phase gradient metasurfaces was studied for controlling the topological charges of generated OVs. Finite element method simulations showed that, in the topological charge range of −6 to 6 and the wavelength range of 1.45 μm to 1.55 μm, the effective vortex emission efficiency of the proposed emitter is around 45%. The on-chip vortex generation and control by wave vector manipulation is a very promising technology for high-capacity inter-chip optical communication.

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Orbital angular momentum vector modes (de)multiplexer based on multimode micro-ring

Cited by 27 publications

References 33 publications

High capacity terahertz communication systems based on multiple orbital-angular-momentum beams

High capacity terahertz communication systems based on multiple orbital-angular-momentum beams

Recent Advances in Generation and Detection of Orbital Angular Momentum Optical Beams—A Review

On-Chip Optical Vortex Generation and Topological Charge Control by Methods of Wave Vector Manipulation

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