Extending orbital angular momentum multiplexing to radially high orders for massive mode channels in fiber transmission

Article Optics

Spin-orbit coupling suppressed high-capacity dual-step-index ring-core OAM fiber

Quanchao Lu et al.

Summary: A dual-step-index ring-core fiber is designed and fabricated for orbital angular momentum mode transmission. Experimental results show that the fiber can support transmission of OAM modes, including higher-order modes, with low loss.

OPTICS LETTERS (2022)

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Article Nanoscience & Nanotechnology

SDM transmission of orbital angular momentum mode channels over a multi-ring-core fibre

Jingxing Zhang et al.

Summary: Spatial division multiplexed optical transmission over a multi-ring-core orbital angular momentum (OAM) fibre is achieved for the first time, enabling the simultaneous transmission of 56 OAM mode channels with a total capacity of 31.4 Tbit/s and a spectral efficiency of 62.7 bit/s/Hz. The weak coupling between higher-order mode groups and the use of modular signal processing greatly improve signal processing efficiency and spectral utilization.

NANOPHOTONICS (2022)

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Article Optics

Optical orbital angular momentum multiplexing communication via inversely-designed multiphase plane light conversion

Juncheng Fang et al.

Summary: In this study, an OAM (de)multiplexer based on multiphase plane light conversion is demonstrated, which enables perfect OAM multiplexing communication. The proposed method is highly efficient and convenient, and it holds great potential for applications in quantum information, information processing, and optical communications.

PHOTONICS RESEARCH (2022)

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Article Optics

Broadband dispersion compensating ring-core fiber for orbital angular momentum modes

Wenqian Zhao et al.

Summary: A well-designed ring-core fiber can support multiple OAM modes with low crosstalk. However, the accumulated chromatic dispersion in OAM fiber limits the data speed and transmission distance of communication systems. This study proposes a triple ring-core fiber with negative dispersion to compensate for multi-order dispersion.

OPTICS EXPRESS (2022)

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Article Engineering, Electrical & Electronic

Orbital Angular Momentum Modes (De)Multiplexer Without Mode Conversion Based on Strongly Guiding Coupled Ring-Core Fibers

Qiaobo Wang et al.

Summary: The mode-matching/finite-element method is used to design strongly guiding coupled ring-core fibers for modulating orbital angular momentum beams. The polarization and orbital angular momentum states of light in the coupler are investigated, revealing the presence of complex supermodes. The proposed OAM couplers achieve high coupling efficiency and low crosstalk without mode conversion.

JOURNAL OF LIGHTWAVE TECHNOLOGY (2022)

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Article Optics

Cylindrical vector beam multiplexer/demultiplexer using off-axis polarization control

Shuqing Chen et al.

Summary: The study introduces a simple approach based on a metal-dielectric-metal metasurface for off-axis polarization control in CVB multiplexing/demultiplexing, enabling high-capacity optical communication. The proposed multiplexers/demultiplexers are broadband and compatible with wavelength-division-multiplexing, achieving a transmission rate of 1.56 Tbit/s in a four-channel CVB communication system. This paves the way for more efficient and high-capacity CVB communication.

LIGHT-SCIENCE & APPLICATIONS (2021)

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Review Optics

Engineering photonic angular momentum with structured light: a review

Jian Chen et al.

Summary: The combination of photonic OAM and SAM provides additional information for new sensing mechanisms and light-matter interactions. Diverse photonic SAM and OAM states can be generated through careful engineering of optical fields. Specifically engineered photonic AM states have potential applications in optical tweezers, directional coupling, and optical information transmission and processing.

ADVANCED PHOTONICS (2021)

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Article Optics