A5000586326- Optical Network Technologies
- Advanced Photonic Communication Systems
- Advanced Fiber Laser Technologies
- Optical Wireless Communication Technologies
- Advanced Optical Network Technologies
- Photonic and Optical Devices
- Syphilis Diagnosis and Treatment
- PAPR reduction in OFDM
- Photonic Crystal and Fiber Optics
- Neural Networks and Reservoir Computing
- Reproductive tract infections research
- Adolescent Sexual and Reproductive Health
Universidade Federal do Espírito Santo
2018-2023
Fraunhofer Institute for Telecommunications, Heinrich Hertz Institute
2022-2023
A successful migration from current C-band based optical networks to a multiband scenario primarily depends on the development of solutions that can reliably measure physical properties links over broad spectral transmission windows.Additionally, these must be capable delivering wavelength-dependent and spatially-resolved indicators empower network operators identify faults before they lead severe service disruptions.Recently, exploitation receiver digital signal processing as tool for...
We report on a large-scale demonstration across access, metro, and core networks, using commercial prototype of multi-band components, achieving significantly reduced provisioning time for live video traffic through seamless IP optical layer orchestration.
This demonstration shows a multi-band over SDM, SDN-capable node prototype, enabling flexible add/drop across S-, C-, and L-bands. It offers cost-efficient, two levels switching node.
The development of efficient anomaly detection schemes is a key element for the implementation autonomous optical networks as they can help telecom operators to automate location defective devices and track overall performance network infrastructure. In that regard, exploitation receiver based digital signal processing (DSP) monitoring has shown be promising enabler spatially resolved wavelength-dependent properties anomalies in fiber links. this work, we study benefits applying DSP-based...
The transmission of constant envelope orthogonal frequency division multiplexing (CE-OFDM) signals is experimentally demonstrated in this paper to increase the reach metro-regional optical links. A recirculating fiber loop was implemented for aim. extension 100 km standard single-mode achieved with CE-OFDM-based system, considering 16 quadrature amplitude modulation (16-QAM) as subcarrier mapping and links without dispersion compensation. Link lengths long 700 km, spectral efficiency 1.89...
A closed-form expression for the bit-error-rate (BER) of constant envelope orthogonal frequency division multiplexing (CE-OFDM) in intensity-modulated direct-detection optical systems is provided this letter. To best our knowledge, letter first that provides an BER considers impact electrical phase modulation index, signal bandwidth, and Mach-Zehnder modulator bias point. Simulation experimental results are included to validate accuracy expression, subject analysis index level subcarrier...
Optical constellations generated by Deep Learning models trained with datasets through simulation are compared to experimentally collected ones. The obtained high accuracy enables its application for optical time domain analysis in complex network scenarios.
Due to the scarcity of diverse and well-organized public datasets, individual research organizations are often forced develop utilize their own datasets. However, utilization machine learning (ML) models in optical communications networks heavily depends on existence high-quality especially covering various parameters be optimized wavelength-division multiplexing (WDM) systems. In this work, we present a dataset for developing testing ML models. The is developed laboratory setting includes...
We discuss the use of an optical recirculating loop for experimental transmission DDO-OFDM signals. Although bitrate is modest, distances as long 900 km were obtained using direct detection.
Direct detection optical orthogonal frequency division multiplexing (DDO-OFDM) systems have been proposed as a well-suited solution for cost-sensitive applications, but also metro/regional links. In this article, we experimentally demonstrate tolerance enhancements of constant-envelope OFDM (CE-OFDM) signals towards Mach–Zehnder modulator (MZM) intermodulation impairments and fiber nonlinear Kerr effects. The additional is achieved by the reduced peak-to-average power ratio (PAPR) CE-OFDM...
Introdução: A microbiota vaginal saudável é composta, em sua maioria, de Lactobacillus. Uma vez enfraquecida, pode ocorrer a vaginose bacteriana (VB), qual está associada à prevalência e incidência várias infecções sexualmente transmissíveis (IST). Objetivo: Analisar relação entre alteração da IST retratada luz literatura. Métodos: Trata-se uma revisão integrativa literatura, traçada agosto 2023, que foram realizadas buscas na Biblioteca Virtual Saúde (BVS) utilizando como estratégia busca o...
We discuss the use of an optical recirculating loop for experimental analysis a Mach-Zehnder Modulator's point operation over numerous transmission distances. For this DDO-OFDM signals are employed, obtaining nominal rate 1.41 Gb/s 600 km, without dispersion compensation. Under these conditions, was analyzed, demonstrating how parameter should be optimized in order to allow better performance long