Ming-Jun Li

Investigation of Chirp–Fiber Dispersion Interaction of 850 nm and 880 nm Self-Injection-Locked VCSELs and Extended Reach Data Transmission over Standard Single-Mode Fiber

Xin Chen, N. N. Ledentsov, Jason E. Hurley, Oleg Makarov et autres

Self-injection-locked (SIL) VCSELs enable optically coupled apertures to operate as a coherent supermode, combining the high power of multi-aperture devices with quasi-single-mode emission, narrowing far-field beam divergence, and simplified coupling into single-mode fiber. In this work, SIL VCSELs operating near 850 and …

us, de (code pays fourni par la source)

Single-Mode 850 and 1060 nm VCSELs With Zn-Diffusion Apertures for AI Data Interconnection

Po-Jui Lai, Zhe-Wei Hsu, Jia-Liang Yen, Xin Chen et autres

tw, us (code pays fourni par la source)

Recent Progress in Multimode Fibers

Ming-Jun Li

Multimode fibers (MMFs) have been a key component in short-reach transmission systems for over 50 years and remain the predominant transmission medium for Vertical Cavity Surface-Emitting Laser (VCSEL)-based short links in data centers. To meet the growing demand for higher data rates, …

us (code pays fourni par la source)

VCSELs: Influence of Design on Performance and Data Transmission over Multi-Mode and Single-Mode Fibers

N. N. Ledentsov, N. N. Ledentsov, V. A. Shchukin, Alexander N. Ledentsov et autres

Substantial improvements in the performance of optical interconnects based on multi-mode fibers are required to support emerging single-channel data transmission rates of 200 Gb/s and 400 Gb/s. Future optical components must combine very high modulation bandwidths—supporting signaling at 100 Gbaud and 200 …

de, us (code pays fourni par la source)

Single-Mode Transmission Over Ultra-Low-Loss 0.1400 dB/km Few-Mode Fibre for Data Centre Interconnects

Fabio A. Barbosa, R.R. Khrapko, Ming-Jun Li, Filipe Ferreira

Experimental 42-Gbaud DP-256-QAM transmission is demonstrated in the C-band over 24 km of ultra-low-loss few-mode fibre, meeting conventional single-mode transmission performance while allowing for SDM upgrades. A study of multipath interference estimation by matching an analytical model to experimental results is presented. …

cz, us (code pays fourni par la source)

Elliptical Core Multimode Fibers for Reduced DSP Complexity in Coherent Optical Transmission

Rekha Yadav, Fabio A. Barbosa, Ming-Jun Li, Filipe Ferreira

In this paper, we analyze the performance of elliptical core graded index fibers with a cladding trench, focusing on a wide range of ovality values and supporting up to 90-polarization modes. We demonstrate a six-fold reduction in the intra-mode group delay and …

cz, gb, us (code pays fourni par la source)

Universal Fibre for Coherent Data Centre Interconnect Applications

Fabio A. Barbosa, Mareli Rodigheri, Samuel Lennard, Ming-Jun Li et autres

Multimode fibers have consistently represented a significant portion of deployed fibres in data centre applications, driven mostly by cost and power advantages. While fibre infrastructure is typically pre-deployed, transceiver upgrades are desirable, and have been made simpler with recent adoption of topologies …

cz, gb, br, us (code pays fourni par la source)

Characterization of Chirp Properties of an 850 nm Single-Mode Multi-Aperture Vertical-Cavity Surface-Emitting Laser and Analysis of Transmission Performance over Multimode and Single-Mode Fibers

Xin Chen, N. N. Ledentsov, Abdullah S. Karar, Jason E. Hurley et autres

By measuring the transfer function of the single-mode multi-aperture vertical-cavity surface-emitting laser (SM MA VCSEL) transmitting over a long single-mode fiber at 850 nm, we confirm that the chirp of the SM MA VCSEL under study is dominated by transient chirp with …

us, de, ca (code pays fourni par la source)

On Data-Aided Coherent Equalization for DCI Applications Using Single-Mode and Universal Fibers

Fabio A. Barbosa, Ming-Jun Li, Filipe Ferreira

We experimentally demonstrate coherent transmission over multimode Universal Fiber using single-mode equalization and short training sequences, achieving similar single-mode fiber performance over 50 km DCI transmission and long-term channel estimate accuracy.

gb, us (code pays fourni par la source)

Stacked and Interleaved DSCM Architectures for Bi-Directional 100G/200G Coherent Pons With Back-Reflection Resilience

Adrian A. Juarez, Zhensheng Jia, Haipeng Zhang, Xin Chen et autres

This paper investigates advanced stacked and interleaved DSCM architectures for 100G and$200 G$coherent-PONs, achieving single wavelength bi-directional transmissions with low backreflection. Spectral efficiency is optimized via comparative analysis of subcarrier spacing and roll-off factors.

us (code pays fourni par la source)

Polarization Maintaining Fiber with Fluorine-Doped Stress Rods

Ming-Jun Li, Jeffery S. Stone, Xin Chen, Jason E. Hurley

A novel polarization-maintaining fiber with fluorine-doped stress rods has been designed and fabricated. The fiber exhibits optical properties compatible with standard single-mode fiber and polarization extinction ratio of$41 ~\text{dB} / \mathrm{m}$at 1310 nm.

us (code pays fourni par la source)

Gradient Based Optimization of Multi-Step-Index Fibers for Low Differential Mode Delay

Jakub Kostial, Ming-Jun Li, Filipe Ferreira

In this paper, we investigate the design of multi-step-index multimode fibers with a cladding trench for 45 spatial modes at 1550nm using an efficient, gradient based radial fiber mode solver.

gb, us (code pays fourni par la source)