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About

About

Henrique M. Salgado graduated in Applied Physics (Optics and Electronics) from the University of Porto in 1985 and received the PhD degree in Electronic Engineering and Computer Systems from University of Wales in 1993. He joined the Department of Electrical Engineering and Computers of the University of Porto in 1999 as an Invited Assistant Professor and in 2003 he became Associate Professor. Since 1995 that he heads the Optical and Electronics Area of INESC TEC, begin responsible for several national and internationally funded (EU) research projects. From 1997-1999 he was Research Fellow at the Department of Electrical and Electronic Engineering of the University College London, UK and previously Research Assistant at the School of Electronic Engineering and Computer Systems, Bangor, UK. He is the author and co-author of numerous international publications in the field of optical fibre communications and microwaves. His current research interests include: radio-over-fiber technology and microwave photonics, digital equalization in coherent optical systems, all-optical networks, modeling of nonlinearities and design of compact multiband antennas. He is a member of the Photonics and Communications societies of the IEEE.

Interest
Topics
Details

Details

017
Publications

2019

Resonant tunneling diode photodetectors for optical communications

Authors
Watson, S; Zhang, WK; Tavares, J; Figueiredo, J; Cantu, H; Wang, J; Wasige, E; Salgado, H; Pessoa, L; Kelly, A;

Publication
Microwave and Optical Technology Letters

Abstract
Optical modulation characteristics of resonant tunneling diode photodetectors (RTD-PD) are investigated. Intensity modulated light excites the RTD-PDs to conduct data experiments. Simple and complex data patterns are used with results showing data rates up to 80 and 200 Mbit/s, respectively. This is the first demonstration of complex modulation using resonant tunneling diodes. © 2019 The Authors. Microwave and Optical Technology Letters published by Wiley Periodicals, Inc.

2018

Experimental Evaluation of Resonant Tunnelling Diode Oscillators Employing Advanced Modulation Formats

Authors
Tavares, JS; Pessoa, LM; Salgado, HM;

Publication
International Conference on Transparent Optical Networks

Abstract
The performance of Resonant Tunnelling Diode (RTD) oscillators with an optical window is evaluated experimentally, in the transmission of advanced modulation formats using electrical and optical modulation, for the first time. Additionally, the impact of phase noise in the transmission performance is also assessed. © 2018 IEEE.

2018

Elliptical Monopole Antenna on InP Substrate for Sub-THz RTD-based Oscillators

Authors
Santos, HM; Pessoa, LM; Salgado, HM; Pinho, P;

Publication
2018 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION & USNC/URSI NATIONAL RADIO SCIENCE MEETING

Abstract
The high permittivity of InP substrates has been a limiting factor for the bandwidth and efficiency of antennas fabricated in this material. In this manuscript we propose an elliptical monopole, monolithically fabricated in InP, fed by a CPW line. The suggested topology was simulated using HFSS finite element method. Input reflection coefficient measurements were performed on the monopole to validate the proposed antenna. Simulated and measured -10 dB bandwidths of 27 and 24 GHz were obtained, respectively. The peak simulated efficiency and realized gain were 95.37% and 4.6 dBi.

2017

Analysis of resonant tunnelling diode oscillators under optical modulation

Authors
Tavares, JS; Pessoa, LM; Figueiredo, JML; Salgado, HM;

Publication
International Conference on Transparent Optical Networks

Abstract
In this paper, we investigate the optical modulation characteristics of a resonant tunnelling diode (RTD) oscillator. This preliminary work on the first RTD-PD oscillators with an optical window available from the iBROW project demonstrate that this device can effectively be used to accomplish amplitude and frequency modulation with light injection. © 2017 IEEE.

2017

Nonlinear Compensation Assessment in Few-Mode Fibers via Phase-Conjugated Twin Waves

Authors
Tavares, JS; Pessoa, LM; Salgado, HM;

Publication
JOURNAL OF LIGHTWAVE TECHNOLOGY

Abstract
In this paper, we further explore the concept of phase-conjugated twin waves (PCTW) for nonlinear cancellation in space-division multiplexed (SDM) systems. Previously, we demonstrated that the PCTW technique can successfully provide nonlinear cancellation in SDM systems. In this paper, we investigate the cases where two and four spatial modes are copropagating in a multimode fiber, considering three link lengths (1000, 3200, and 8000 km). Weak-and strong-coupling regimes are also evaluated. Our numerical simulation results show an average performance improvement > 10 dB after a 1000 km transmission link.

Supervised
thesis

2017

Implementação em FPGA de um conversor HDMI para transmissão em série de alta velocidade

Author
Ana Marisa Oliveira Barbosa

Institution
UP-FEUP

2017

Projeto de tags RFID sem chip baseadas em codificação de impedância

Author
Erick Delgado Lima

Institution
UP-FEUP

2016

Design of Compact Multiband Antennas for Mobile Devices Operating on Next Generation Networks

Author
Oluyomi Aboderin

Institution
UP-FEUP

2016

Comunicações óticas de alto débito para estação de acostagem submarina

Author
Diogo José Pereira Lima de Matos Lage

Institution
UP-FEUP

2016

Underwater Wireless Power Transfer

Author
Hugo Miguel Guedes Pereira dos Santos

Institution
UP-FEUP