OPTICAL NETWORKS AND PHOTONIC SYSTEMS

Roberto Llorente Sáez y Maria Morant Pérez

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The Optical Networks Aad Photonic Systems Area researches novel architectures and technologies for networks based on optical fibre (FTTH, fibre-to-the-home). These networks can provide high bitrates (exceeding tens of gigabit/s per user) in a wide geographic area in a highly cost effective manner (considering deployment, operation, maintenance, and energetic consumption costs). The area also performs research in hybrid radio-fibre optic architectures for providing high bitrates via radio-frequency with optical connectivity for mobile users – targeting access networks and in-building networks. These architectures employ the latest radio technologies including 5G and beyond-5G signals and other wireless standards like LTE, WiMAX and WiFi. Frequency conversion to sub-THz and THz bands is also investigated using optical techniques. .

Multiplexing techniques to increase the capacity of optical networks, such as sub-carrier multiplexing (SCM), dense wavelength division multiplexing (DWDM) or polarization-division multiplexing (PDM) are also being researched in this area. Evaluation of spatial division multiplexing (SDM) on multicore fibers (MCF) and few-mode fibers (FMF) is also deployed in our laboratories. Advanced applications and digital signal processing such as MIMO and machine learning are also taken into account. Passive optical network (PON) architectures and amplified access networks are also under study, as well as novel signal generation and modulation schemes. Other research lines include: impairment mitigation, photonic sensing and bio applications using specialty fibers.

Performance Evaluation of Dual-Drive Mach-Zehnder Modulator and Optomechanical Crystal Cavity Comb generation for All-Optical Band Conversion in 5G-Advanced Cellular Systems
Vicente Fito, Raul Ortiz, Maria Morant, Laura Mercade, Alejandro Martinez, Roberto Llorente,
IEEE Photonics Journal, Early Access, 2025

Experimental Evaluation of All-Optical Up- and Down-Conversion of 3GPP 5G NR Signals Using an Optomechanical Crystal Cavity Frequency Comb
Vicente Fito, Raul Ortiz, Maria Morant, Laura Mercade, Roberto Llorente, Alejandro Martinez,
IEEE/OSA Journal of Lightwave Technology, 42(19), 6825-6831, 2024

Frequency Conversion of OFDM
Microwave Signals in a Wavelength-Scale Optomechanical Cavity
Laura Mercade, Maria Morant, Amadeu Griol, Roberto Llorente, Alejandro Martinez,
Laser & Photonics Reviews, Wiley, 15(11), 2100175, 2021

Remote Photonic THz Generation using
an Optical Frequency Comb and Multicore Fiber
Maria Morant, Luis Gonzalez Guerrero, Cyril C. Renaud, Roberto Llorente,
IEEE/OSA Journal of Lightwave Technology, 39(24), 7621-7627, 2021

Integrated wireless-optical backhaul and fronthaul provision through multicore fiber
Luis Gonzalez Guerrero, Maria Morant, Tongyun Li, Martyn J. Fice, Alwyn J. Seeds, Roberto Llorente, Ian H. White, Richard V. Penty, Cyril C. Renaud,
IEEE Access, 8, 146915-146922, 2020

Multi-beamforming provided by dual-wavelength true time delay PIC and multicore fiber
Maria Morant, Ailee Trinidad, Eduward Tangdiongga, Ton Koonen, Roberto Llorente,
IEEE/OSA Journal of Lightwave Technology, 38(19), 5311-5317, 2020

Experimental demonstration of mm-wave 5G NR photonic beamforming based on ORRs and multi-core fiber
Maria Morant, Ailee Trinidad, Eduward Tangdiongga, Ton Koonen, Roberto Llorente,
IEEE Transactions on Microwave Theory and Techniques, 67(7), 2928-2935, 2019

Performance analysis of multiple radio-access provision in a multicore-fibre optical fronthaul
Maria Morant, Roberto Llorente,
Optics Communication, ELSEVIER, 436, 161-167, 2019

Performance analysis of carrier-aggregated multi-antenna 4×4 MIMO LTE-A fronthaul by spatial multiplexing on multicore fiber
Maria Morant, Roberto Llorente,
IEEE/OSA Journal of Lightwave Technology, 36(2), 594-600, 2018

On the suitability of multicore fiber for LTE–Advanced MIMO optical fronthaul systems.
Maria Morant, Andres Macho, Roberto Llorente,
IEEE/OSA Journal of Lightwave Technology, 34(2), 676-682, 2016

Next-generation optical fronthaul systems using multicore fiber media
Andres Macho, Maria Morant, Roberto Llorente,
IEEE/OSA Journal of Lightwave Technology, 34(20), 4819-4827, 2016

Unified model of linear and nonlinear crosstalk in multi-core fiber
Andres Macho, Maria Morant, Roberto Llorente,
IEEE/OSA Journal of Lightwave Technology, 34(13), 3035-3046, 2015

Roberto Llorente Sáez – Group leader

Maria Morant Pérez – Group leader

Vicente Fito Estevan  – Predoctoral researcher

Daniela Satián Guamán  – Predoctoral researcher

SEE MORE «NANOPHOTONICS FOR COMUNICATIONS» RESEARCHS

PHOTONICS INTEGRATED DEVICES

Prof. Pablo Sanchís

PHOTONICS INTEGRATED SYSTEMS AND APPLICATIONS

Prof. Javier Martí​

PLASMONICS AND OPTOMECHANICS​

Prof. Alejandro Martínez​

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