4.5 Article

Generation and Amplification of Third-Order Orbital Angular Momentum Modes in a Low-Loss All-Fiber System

Related references

Note: Only part of the references are listed.
Article Engineering, Electrical & Electronic

Fabrication and Sensing Characteristics of Long-Period Fiber Grating in Capillary Fiber

Yunhe Zhao et al.

Summary: This article proposes a novel fiber device based on arc induced long-period fiber gratings (LPFGs) in a hollow core silica capillary. The device consists of a lead-in single mode fiber (SMF), LPFGs in capillary (CLPFGs), and a lead out SMF, with a tapered air cavity (TAC) connecting SMF and capillary. The transmissive characteristics of the capillary with and without LPFGs are analyzed theoretically and experimentally. The proposed device has potential applications in high-sensitivity RI sensing fields and vector bending measurement, due to its compactness, low cost, and ease of fabrication.

IEEE SENSORS JOURNAL (2023)

Article Optics

Adaptive Bayesian neural networks nonlinear equalizer in a 300-Gbit/s PAM8 transmission for IM/DD OAM mode division multiplexing

Sitong Zhou et al.

Summary: This Letter proposes a Bayesian neural network (BNN) nonlinear equalizer for orbital angular momentum (OAM) mode division multiplexing (MDM) transmission. The BNN equalizer, with probability distributions for weights and biases, effectively mitigates nonlinear distortions and improves system complexity compared to conventional Volterra and convolutional neural network (CNN) equalizers. Experimental results show that the BNN equalizer outperforms the Volterra and CNN equalizers, achieving receiver sensitivity improvements of 1.0 dBm and 2.5 dBm, respectively, and is a promising solution for high-capacity inter-data center interconnects.

OPTICS LETTERS (2023)

Article Optics

Vortex beam: generation and detection of orbital angular momentum [Invited]

Yihua Bai et al.

Summary: This review provides an overview of the fundamental concepts and advancements in the generation and detection methods of vortex beams. The research on vortex beams has laid a solid foundation for the applications in advanced optical manipulations, optical communications, and super-resolution imaging.

CHINESE OPTICS LETTERS (2022)

Review Engineering, Electrical & Electronic

OAM Beams Generation Technology in Optical Fiber: A Review

Yudong Lian et al.

Summary: This article provides a comprehensive review of the basic principles of OAM fiber design and the generation technology of OAM beams in optical fibers, as well as discusses the challenges and application prospects.

IEEE SENSORS JOURNAL (2022)

Article Optics

Seven-core fiber torsion sensor with microcavity structure based on intensity measurement

Xinghu Fu et al.

Summary: The seven-core fiber torsion sensor with microcavity structure based on intensity measurement is proposed, which shows high sensitivity in detecting torsion with a simple structure. It has great potential for wide applications in the field of torsion sensing.

OPTICS COMMUNICATIONS (2022)

Article Engineering, Electrical & Electronic

All-Fiber Fourth-Order OAM Mode Generation Employing a Long Period Fiber Grating Written By Preset Twist

Wenzhe Chang et al.

Summary: This paper presents an efficient all-fiber approach to generate fourth-order orbital angular momentum (OAM) mode using a preset twisted long period fiber grating (PT-LPFG) in a few-mode fiber (FMF). The experimental results demonstrate the successful generation of the OAM(+/- 4) modes.

JOURNAL OF LIGHTWAVE TECHNOLOGY (2022)

Article Computer Science, Information Systems

Adaptive Optics for Orbital Angular Momentum-Based Internet of Underwater Things Applications

Lei Zhu et al.

Summary: This article proposes a random-amplitude-mask-based adaptive optics technique to mitigate turbulence effects in OAM-based underwater wireless optical communication (UWOC) system. Linear measurements obtained from distorted OAM beams modulated with random amplitude masks are employed for phase estimation. Additionally, a performance comparison is conducted against state-of-the-art phaseless wave-front sensing techniques, and the mixture exponential-generalized gamma distribution is used for characterizing the probability density function of reference-channel irradiance. The article also analyzes performance metrics for both single-input-single-output (SISO) and multiinput-multioutput (MIMO) systems, providing new insights for the applications of AO in the OAM-based UWOC system.

IEEE INTERNET OF THINGS JOURNAL (2022)

Article Optics

Simultaneous generation of the second- and third-order OAM modes by using a high-order helical long-period fiber grating

Taishu Detani et al.

Summary: This study presents and experimentally validates an all-fiber OAM mode generator capable of simultaneously generating second- and third-order OAM modes with conversion efficiencies exceeding 95%. By utilizing a high-order helical long-period fiber grating in a thinned four-mode fiber, this novel approach enables the simultaneous generation of different OAM modes within a single fiber component.

OPTICS LETTERS (2021)

Article Engineering, Electrical & Electronic

Adiabatic Coupler With Nonlinearly Tapered Mode-Evolution Region

Deng Mao et al.

Summary: In this study, a time-efficient method was proposed to analyze and design adiabatic couplers (ACs) on the silicon-on-insulator platform. Different tapering functions were compared for optimized performance, with quadratic separation and exponentially varying width showing the least imbalance and smallest footprint for a designed 3-dB AC. Experimental results confirmed the effectiveness of this tapering method for achieving desired split ratios in imbalanced ACs.

IEEE PHOTONICS TECHNOLOGY LETTERS (2021)

Review Optics

Generation of polarization and phase singular beams in fibers and fiber lasers

Dong Mao et al.

Summary: This article discusses the formation mechanisms of cylindrical vector beams and vortex beams in few-mode fibers, recent advances in generating techniques, and compares the performances of these beams in fibers and fiber lasers to promote their practical applications.

ADVANCED PHOTONICS (2021)

Article Engineering, Electrical & Electronic

Femtosecond Laser Inscription of Fiber Bragg Grating in Twin-Core Few-Mode Fiber for Directional Bend Sensing

Kaiming Yang et al.

JOURNAL OF LIGHTWAVE TECHNOLOGY (2017)

Article Engineering, Electrical & Electronic

Generation of Femtosecond Optical Vortex Beams in All-Fiber Mode-Locked Fiber Laser Using Mode Selective Coupler

Teng Wang et al.

JOURNAL OF LIGHTWAVE TECHNOLOGY (2017)

Article Optics

Low-crosstalk orbital angular momentum fiber coupler design

Zhishen Zhang et al.

OPTICS EXPRESS (2017)

Review Nanoscience & Nanotechnology

Optical vortices in fiber

Siddharth Ramachandran et al.

NANOPHOTONICS (2013)

Article Optics

Control of orbital angular momentum of light with optical fibers

Nenad Bozinovic et al.

OPTICS LETTERS (2012)

Review Optics

Tweezers with a twist

Miles Padgett et al.

NATURE PHOTONICS (2011)

Article Engineering, Electrical & Electronic

Capacity Limits of Optical Fiber Networks

Rene-Jean Essiambre et al.

JOURNAL OF LIGHTWAVE TECHNOLOGY (2010)

Review Optics

Advances in optical angular momentum

Sonja Franke-Arnold et al.

LASER & PHOTONICS REVIEWS (2008)