Using Standard 2x2 MIMO to Increase Capacity of Spatial Multiplexing with OAM Modes

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 Engineering, Electrical & Electronic

Perfect Vortex Modes for Nondestructive Characterization of Mode Dependent Loss in Ring Core Fibers

Mai Banawan et al.

Summary: Ring core fibers (RCF) are high-performance modal multiplexing techniques with low crosstalk and support for orbital angular momentum (OAM) modes. However, characterizing RCFs is challenging due to the lack of commercial multiplexers. We have successfully used perfect vortex beams to accurately measure mode-dependent loss (MDL) in RCFs.

JOURNAL OF LIGHTWAVE TECHNOLOGY (2022)

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Article Engineering, Electrical & Electronic

Quantifying the Coupling and Degeneracy of OAM Modes in High-Index-Contrast Ring Core Fiber

Mai Banawan et al.

Summary: This study investigates the coupling of OAM modes in ring-core fibers due to elliptical shape deformation, introducing a coupling model that shows improved predictions compared to classical modeling approaches. The model captures the disparate behaviors of coupling in lower and higher order degenerate OAM modes, and predicts the OAM order at which orthogonality is maintained despite elliptical deformation. The study also reveals different performance and signal processing requirements for thin and thick RCFs under the same level of elliptical deformation.

JOURNAL OF LIGHTWAVE TECHNOLOGY (2021)

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Article Engineering, Electrical & Electronic