Explanipedia

Open-Source Large Language Models and AI Health Equity: A Health Service Triangle Model Perspective (Preprint) Open

Chun Hao, Ning Liu, Shaolong Wu, Wenxin Zou, Jiajing Tu , et al. · 2025

UNSTRUCTURED This paper explores the role of open-source Large Language Models (LLMs) in promoting AI health equity from the perspective of the health service triangle model. First, it analyzes the development history of AI health and the…

Accelerating Evolution: Integrating PSO Principles into Real-Coded Genetic Algorithm Crossover Open

Xiaobo Jin, Jiajing Tu · 2025

This study introduces an innovative crossover operator named Particle Swarm Optimization-inspired Crossover (PSOX), which is specifically developed for real-coded genetic algorithms. Departing from conventional crossover approaches that on…

Transfer of orbital angular momentum between two identical optical ring-core fibers Open

Z. Q. Xie, Yingkui Zhao, Shecheng Gao, Shan Jiang, Jiajing Tu , et al. · 2025

With the rapid advancements in optical and quantum communication, orbital angular momentum (OAM) has emerged as a promising approach for enhancing system performance, owing to its unique structural properties. However, efficiently transfer…

Five orbital-angular-momentum mode-group Erbium-doped fiberamplifier with modal gain equalization Open

She Gao, Bao‐Zhu Guo, Wenhao Li, Jiajing Tu, Cheng Du , et al. · 2025

As the bottleneck device of a space-division multiplexing (SDM) communication system that exploits the degrees of freedom to further increase the capacity within the transmission band, the main challenge facing the integrated SDM amplifier…

Mode-bases gain difference for different phase profiles in few-mode erbium-doped fiber amplifiers Open

Jie Zhang, Shecheng Gao, Wei Li, Jiajing Tu, Yanghua Xie , et al. · 2025

Research on the Influence of the “New Income Standards” on the Quality of Accounting Information —— Empirical Analysis Based on Continuous Difference-in-differences Method Open

Jiajing Tu · 2024

As one of the six elements of accounting, income is an important factor affecting the decision-making of stakeholders, and the implementation effect of the “new income standards” has become the focus of scholars’ attention. This paper empi…

Quadrature amplitude modulation for electronic sideband Pound-Drever-Hall locking Open

Jiajing Tu, Alessandro Restelli, T-C. Tsui, Kevin Weber, I. B. Spielman , et al. · 2024

The Pound-Drever-Hall (PDH) technique is routinely used to stabilize the frequency of a laser to a reference cavity. The electronic sideband (ESB) locking scheme, a PDH variant, helps bridge the frequency difference between the quantized f…

Mode-bases gain difference for Different phase profiles in Few-mode Erbium-doped Fiber Amplifiers Open

Jie Zhang, She Gao, Jiajing Tu, Li Wei, Cheng Du , et al. · 2024

In few-mode erbium-doped fiber, which is key sections in space division multiplexing (SDM) communication system, linearly polarized (LP) and orbital angular momentum (OAM) mode as two groups of mode-bases with different phase profile can b…

Mode-bases gain difference for Different phase profiles in Few-mode Erbium-doped Fiber Amplifiers Open

Jie Zhang, She Gao, Jiajing Tu, Wei Li, Cheng Du , et al. · 2024

In few-mode erbium-doped fiber, which is key sections in space division multiplexing (SDM) communication system, linearly polarized (LP) and orbital angular momentum (OAM) mode as two groups of mode-bases with different phase profile can b…

Mode-bases gain difference for Different phase profiles in Few-mode Erbium-doped Fiber Amplifiers Open

Jie Zhang, She Gao, Jiajing Tu, Wei Li, Cheng Du , et al. · 2024

In few-mode erbium-doped fiber, which is key sections in space division multiplexing (SDM) communication system, linearly polarized (LP) and orbital angular momentum (OAM) mode as two groups of mode-bases with different phase profile can b…

Mode manipulation in a ring–core fiber for OAM monitoring and conversion Open

Guowei Wu, Shecheng Gao, Jiajing Tu, Lei Shen, Yuanhua Feng , et al. · 2022

The monitoring and conversion of photonic orbital angular momentum (OAM) play fundamental and important roles for both classic and quantum technologies, especially in low-loss transmission media such as ring-core fibers (RCFs), which make …

Multi-channel higher-order OAM generation and switching based on a mode selective interferometer Open

Guowei Wu, Xiaowen Wu, Shecheng Gao, Jiajing Tu, Ji Zhou , et al. · 2022

A multi-channel orbital angular momentum (OAM) mode generation and switching scheme is proposed and demonstrated based on an in-fiber mode selective interferometer (MSI), which is formed in a four-mode fiber. The MSI consists of two strong…

Amplification of 20 orbital angular momentum modes based on a ring-core Yb-doped fiber Open

Nanxian Ou, Jiajing Tu, Tianjin Wen, Wei Li, Shecheng Gao , et al. · 2022

An orbital angular momentum (OAM) fiber amplifier supporting 20 OAM modes based on a ring-core Yb-doped fiber (RC-YDF) is proposed and demonstrated. The RC-YDF we designed and fabricated has two successive Yb-doped annular layers in the ri…

Third- and fourth-order orbital angular momentum multiplexed amplification with ultra-low differential mode gain Open

Tianjin Wen, Shecheng Gao, Wei Li, Jiajing Tu, Cheng Du , et al. · 2021

In this Letter, a ring-core erbium-doped fiber (RC-EDF), with a two-layer erbium-doped structure, supporting up to the fourth-order orbital angular momentum (OAM) mode was designed and fabricated for the OAM mode multiplexed amplification.…

Sorting OAM modes with metasurfaces based on raytracing improved optical coordinate transformation Open

Zhibing Liu, Jiahui Zou, Zhaoyu Lai, Jiajing Tu, Shecheng Gao , et al. · 2021

Optical coordinate transformation (OCT) has attracted widespread attention in the field of orbital angular momentum (OAM) (de)multiplexing or manipulation, but the performance of OCT would suffer from its distortion. In this paper, we quan…

The third- and fourth-order orbital angular momentum multiplexed\n amplification with ultra-low differential mode gain Open

Tianjin Wen, Shecheng Gao, Wei Li, Jiajing Tu, Cheng Du , et al. · 2021

In this Letter, a ring-core erbium-doped fiber (RC-EDF), with two-layer\nerbium-doped structure, supporting up to the fourth-order orbital angular\nmomentum (OAM) mode is designed and fabricated for OAM mode multiplexed\namplification. Usi…

Mode analysis of orbital angular momentum modes carrying multi-mode ring-core fibers Open

Jiajing Tu, Quanchao Lu, Zhuo Wang, Shecheng Gao, Weiping Liu , et al. · 2021

Transmission and Generation of Orbital ANGULAR Momentum Modes in Optical Fibers Open

Zhuo Wang, Jiajing Tu, Shecheng Gao, Zhaohui Li, Changyuan Yu , et al. · 2021

The orbital angular momentum (OAM) of light provides a new degree of freedom for carrying information. The stable propagation and generation of OAM modes are necessary for the fields of OAM-based optical communications and microscopies. In…

Multiple orbital angular momentum mode switching at multi-wavelength in few-mode fibers Open

Xiaowen Wu, Shecheng Gao, Jiajing Tu, Lei Shen, Chenglong Hao , et al. · 2020

Mode division multiplexing has attracted great attention because it can potentially overcome the limitation of single-mode fiber traffic capacity. However, it has been challenging to realize multiple modes controlling and switching due to …

Hybrid Angular Gradient Phase Grating for Measuring the Orbital Angular Momentum of Perfect Optical Vortex Beams Open

Chao Chu, Shecheng Gao, Zhibing Liu, Jiajing Tu, Jishun Yang , et al. · 2020

We propose an effective method to measure the orbital angular momentum of a perfect optical vortex (POV) beam with a hybrid angular gradient phase grating (HAG-PG), which is a gradient grating with angular changing distribution. The HAG-PG…

1.12 Tbit/s fiber vector eigenmode multiplexing transmission over 5-km FMF with Kramers-Kronig receiver Open

Jianbo Zhang, Xiong Wu, Linyue Lu, Jianping Li, Jiajing Tu , et al. · 2020

We demonstrate a 1.12 Tb/s MIMO-free vector eigenmode multiplexed signal transmission over 5-km 4-mode few-mode-fiber using 2 vector modes (HE11 and EH11), 5 wavelengths and 28 GBaud 16-QAM signal with direct-detection Kramers-Kronig recei…

Ring-core fiber with negative curvature structure supporting orbital angular momentum modes Open

Jiajing Tu, Zhengyong Liu, Shecheng Gao, Zhuo Wang, Jianbo Zhang , et al. · 2019

Compared to glass walls with a positive curvature, those with a negative curvature have been proven to have stronger confinement of light. Therefore, we change the multi-layered air holes in a photonic crystal fiber into several negative c…

Non-invasive smart monitoring system based on multi-core fiber optic interferometers Open

Shuyang Chen, Fengze Tan, Zhenyu Huang, Tianyu Yang, Jiajing Tu , et al. · 2018

A smart monitoring system based on fiber-optic interferometers using multi-core fiber (MCF) is presented in this paper. Interference among cores in the seven-core fiber (SCF) was introduced by using multi-mode fiber (MMF) coupling and expe…

Transmitter and receiver DSP for 112 Gbit/s PAM-4 amplifier-less transmissions using 25G-class EML and APD Open

Jiahao Huo, Xian Zhou, Kangping Zhong, Jiajing Tu, Jinhui Yuan , et al. · 2018

The transmission performance of 112 Gbit/s PAM-4 signal with commercial 25 G-class EML and APD is experimentally studied by using advanced digital signal processing (DSP) algorithms, i.e. pre-equalization (Pre-EQ), error-table based pre-co…

Torsion sensor based on inter-core mode coupling in seven-core fiber Open

Fengze Tan, Zhengyong Liu, Jiajing Tu, Changyuan Yu, Chao Lü , et al. · 2018

We proposed a novel torsion sensor based on inter-core mode coupling in seven-core fiber (SCF). The torsion sensor is fabricated by tapering a commercially available SCF spliced with two single mode fibers. Waist diameter and length of the…

Single Channel 50 Gbit/s Transmission Over 40 km SSMF Without Optical Amplification and In-Line Dispersion Compensation Using a Single-End PD-Based PDM-SSB-DMT System Open

Xian Zhou, Jiahao Huo, Kangping Zhong, Faisal Nadeem Khan, Tao Gui , et al. · 2017

We experimentally demonstrate a single-end photodetector (PD) based polarization-division-multiplexing (PDM) system, in which the single-sideband orthogonal frequency-division multiplexing (SSB-OFDM) and discrete multitone (DMT) signals ar…

Design and optimization of 32-core rod/trench assisted square-lattice structured single-mode multi-core fiber Open

Xueqin Xie, Jiajing Tu, Xian Zhou, Keping Long, Kunimasa Saitoh · 2017

We propose and design a kind of heterogeneous rod-assisted and trench-assisted multi-core fiber (Hetero-RA-TA-MCF) with 32 cores arranged in square-lattice structure (SLS), and then we introduce the design method for Hetero-RA-TA-MCF. Simu…

Heterogeneous trench-assisted few-mode multi-core fiber with graded-index profile and square-lattice layout for low differential mode delay Open

Jiajing Tu, Kunimasa Saitoh, Yoshimichi Amma, Katsuhiro Takenaga, Shoichiro Matsuo · 2015

We propose a kind of heterogeneous trench-assisted graded-index few-mode multi-core fiber with square-lattice layout. For each core in the fiber, effective area (A(eff)) of LP(01) mode and LP(11) mode can achieve about 110 μm(2) and 220 μm…

Energy-saving Strategy Based on an Immunization Algorithm for Network Traffic Open

Dongyan Zhao, Keping Long, Dongxue Wang, Yichuan Zheng, Jiajing Tu · 2015

The rapid development of both communication traffic and increasing optical network sizes has increased energy consumption.Traditional algorithms and strategies don't apply to controlling the expanded network.Immunization algorithms origina…

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