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Presentation

At CAP we perform R&D in applied photonics, principally focusing on optical fibre technology.

We are oriented towards applied research and development in optical fibre sources, optical fibre communication, optical fibre sensors and microfabrication (thin films and integrated optics).

Our group is always looking for opportunities for technology transfer to industrial companies using its specific competencies in optoelectronics and systems integration.

Latest News
Networked Intelligent Systems

INESC TEC research awarded at international optics and photonics conference

The research work developed by Paulo Santos and Tiago Ferreira, INESC TEC researchers, was acknowledged at the International Conference AOP 2022 – 5th International Conference on Application of Optics and Photonics, promoted by the Portuguese Society of Optics and Photonics (SPOF). André Gomes, former INESC TEC researcher, received the awards for best PhD thesis at the conference.

03rd October 2022

INESC TEC robotics project wins VIDA RURAL award

The METBOTS project, developed by INESC TEC in partnership with ADVID - Vine and Wine cluster, won the "I&D que Marca" award, granted at the 2022 edition of the VIDA RURAL Awards.

27th May 2022

Industrial and Systems Engineering

INESC TEC reaches the podium at the 8th edition of the Crédito Agrícola Entrepreneurship and Innovation award

The SpecTOM and Smart Trap projects were acknowledged at the 8th edition of the Crédito Agrícola Entrepreneurship and Innovation award, an initiative that rewards innovative projects, with economic viability and significant benefits for society. SpecTOM won the Agro-Industry 4.0 category and Smart Trap (new designation is AgIoTrap) won the Born from Knowledge (BfK) award, granted by the National Innovation Agency (ANI). INESC TEC's Technology Licensing Office (SAL) supported the participation of said projects in this initiative.

09th March 2022

Networked Intelligent Systems

INESC TEC will develop a new method to detect micro-contaminants

INESC TEC will validate a new approach for the detection of micro-contaminants in different application areas, namely water quality control, optimisation of industrial processes, and even medical diagnosis – in real time, and in complex environments.  

17th January 2022

Industrial and Systems Engineering

INESC TEC leads project to improve productivity and quality of wine production

The Centre for Robotics in Industry and Intelligent Systems (CRIIS) and the Centre for Applied Photonics (CAP) at INESC TEC will develop an automatic platform to integrate robotic-assisted intelligent photonics sensors, with artificial intelligence and systems biology.  

10th January 2022

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Interest Topics
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Featured Projects

SMARTCAP

Light-activated cap for catheters sterilization

2022-2025

MYTAG

Dispositivos de monitorização ambiental universais baseados na análise Inteligente de dispersão ótica amplificada com polímeros de impressão molecular

2022-2025

LIRA

Optical Fiber Micro-Kelvin Temperature Sensor Network For Sensitive Optical Payloads

2021-2023

DFOSREN

DFOS – distributed fibre optic sensing para deteção de colisões nas linhas aéreas de muito alta tensão

2021-2022

EUSCORES

EUropean - Scalable and Complementary Offshore Renewable Energy Sources

2021-2025

SpecTOM_BIPProof2020

Programa de atribuição de apoios para prova de conceito da Universidade do Porto

2021-2021

GREENPEG

Análise de composição elementar pela técnica LIBS

2020-2020

LightBrain

LightBrain - a light speed neuromorphic chip with quantum fluids of light

2020-2022

SMARTFARM40

Soluções inteligentes para uma agricultura sustentável, preditiva e autónoma

2020-2023

CorkSurf

Analisador de composição e homogeneidade de tratamentos de superfície por espectroscopia de plasma induzido por laser

2020-2023

CaVaLi

Cadeia de valor do lítio

2020-2023

inSITE

inSITE. Insitu ore grading system using LIBS in harsh environments

2020-2022

FOOD4U

Real-time monitoring of fresh food quality with optical sensors

2019-2020

SmartEcotec

Viabilidade de Implementação de Sistema de Inteligência Artificial para o Diagnóstico, Previsão e Controlo Multivariado de Unidades de Tratamento de Lixiviados

2019-2020

WiPTherm

Innovative WIreless Power devices Using micro-Thermoelectric Generators arrays for Nanosatellites

2019-2022

OpTweezers

Consultoria, aconselhamento técnico e acesso a infraestrutura de fabrico e teste de pinças óticas

2019-2022

ESAPlastics

De-risk assessment: spectrometer for marine litter

2019-2021

EFAR

Cabeças sensoras para corrente contínua

2019-2019

FlexOPlan

Planeamento Operacional da Potência Ativa e Reativa na Interface entre TSO e DSO

2019-2021

LED

Consultoria especializada em sistemas óticos

2018-2020

SENVIB

Sensor ótico de vibração para aplicações em transformadores

2018-2018

MetBots

Metabolomic robots with self-learning artificial intelligence for precision agriculture

2018-2021

GreenNanoSensing

Quantum nanoSensing for renewable energy and environmental management

2018-2022

ENDOR

Endoscope based on new optical fibre technology for Raman spectroscopy

2018-2021

SolSensors

Development of advanced fibre optic sensors to monitor the durability of concrete and reinforced concrete structures

2018-2021

SAFEWATER

On chip whispering gallery mode optical microcavities for emerging microcontaminant determination in waters

2018-2021

FLAPSYS

Fiber laser plasma spectroscopy system for real time element analysis

2018-2022

MINDOG

Adaptação de 3 sensores de H2S para incorporação em sistemas de deteção de flatulência canina

2017-2019

TEC4Sea

Modular Platform for Research, Test and Validation of Technologies supporting a Sustainable Blue Economy

2017-2022

INFANTE

Sistema de apresentação da "Maquete do Porto Mediaval", do Museu Casa do Infante

2017-2017

AGRINUPES

Integrated monitoring and control of water, nutrients and plant protection products towards a sustainable agricultural sector

2017-2020

CORAL-SENSORS

CORAL – Sustainable Ocean Exploitation: Tools and Sensors

2016-2018

CORAL-TOOLS

CORAL – Sustainable Ocean Exploitation: Tools and Sensors

2016-2018

Femto3D

Fabricação tridimensional de dispositivos ópticos integrados por escrita directa com laser femtosegundo

2016-2017

TECCON2

Acordo de Cooperação em P&D entre INESC P&D Brasil e INESCTEC para participação no projeto TECCON2

2016-2020

STRONGMAR-CRAS

STRengthening MARritime Technology Research Center

2016-2018

MarineEye

MarinEye - A prototype for multitrophic oceanic monitoring

2015-2017

NanoStima-RL1

NanoSTIMA - Macro-to-Nano Human Sensing Technologies

2015-2019

VAMOS

Viable Alternative Mine Operating System

2015-2019

EYEFRY

Cooking oils degradation assessment system

2014-2015

Re-Learning

Human motor re-learning by sensor information fusion

2014-2015

GOPA

Environmental processes management and optimisation

2013-2014

Spin_Fonao

Magnetic-induced ferroelectricity unravelled through spin-phonon coupling

2013-2015

InCell

Optical fibre tweezers for single cell manipulation and analysis

2013-2014

SNIFFER

Sensor devices network for food supply chain security

2013-2016

ThermaMonitor

System based on optical fibre sensors to monitor temperature in electrical machines

2013-2014

Sensing

Network Sensing for Critical Systems Monitoring

2013-2015

SmartGrids

Smart Grids

2013-2015

Cyclops

Single-Pixel Imaging Lidar based on Compressive Sensing

2013-2014

Cooperation

Cooperation and Perception for Augmented Autonomy

2013-2015

Ecoal-MGT

Ecological Management of Coal Waste Piles

2012-2015

IORT

The effect of shielding on dose distributions in intra-operative electron radiotherapy: a Monte Carlo simulation study

2012-2015

SPR

Plasmonics Based Fibre Optic Sensing with Enhanced Performance

2012-2014

WineBioCode

Biosensor Development for Wine Traceability in the Douro Region

2012-2015

E-Coli

Lab-on-a-chip: E.coli rapid detection

2012-2012

NanoWires

Optical Fibre NanoWires

2012-2012

FLUOROCT

Dose distribution mapping and Monte Carlo simulations in CT-fluoroscopy

2011-2014

Wood

Numerical and experimental study of cohesive laws in bonded wood joints

2011-2014

AQUAMONITOR

Optical fiber sensors for water quality monitoring applied to the determination of dissolved carbon dioxide in aquaculture

2011-2013

Nanovalor

Pole of Competitiveness in Nanotechnology for the enhancement of R&D potential in the Euroregion Galicia-Northern Portugal

2011-2014

MicroNanoCarolina

Expanding activity in optics and optoelectronics: micro and nonofabrication technologies

2010-2012

Multiferroicos

Multiferroic and Magnetoelectric materials for spintronics: obstacles and interfaces

2010-2013

FIBDOSE

Fibre dosimeters for in vitro and in vivo dosimetry in External Radiotherapy and Brachytherapy

2010-2013

SmartCoat

Optical fibre sensors embedded in composite materials to monitor physical parameters

2010-2012

TECCON

Optical fibre sensors to supervise, control and protect electric power systems

2010-2013

SensEFil

Monitoring filament wound vessels using optical sensors embedded in composite reinforcement

2010-2012

MCP

Antibacterial and osteogenic behaviour of Modified Calcium Phosphates (MCP): in vitro and in vivo evaluation

2010-2013

Hybrid

Hybrid electro-optical microfluidic device for single cell analysis

2010-2013

WaveTune

Monitoring systems based on optical fibre technology

2010-2011

SensingVed

Intelligent monitoring system based on sensor networks

2010-2010

Microphyte

Sensors for a new and more competitive bioprocess for the production of hydrogen

2010-2013

SensKanoe

Sensing systems applied to canoes

2009-2012

Mobiles

Sustainable electric mobility - Solutions for the logistics associated with electric vehicle battery charging

2009-2012

TunLas

Optical fibre tunable lasers

2009-2017

SkateMus

Music generation from skater movements

2009-2009

Memimetria

System to measure the thickness of materials using interferometric imaging setups

2008-2010

Biomotion

Perception of biological motion - integrating psychophysics, neurophysiology and computational modeling

2008-2012

Bioswim

Body Interface System based on Wearable Integrated Monitoring

2008-2011

Endurance0

Optical fibre Bragg sensors to monitor structures in Civil Engineering

2008-2010

Nanocrystalline

Glass Ceramics with Non Linear Optical Properties

2008-2011

AmdraphydII

Advanced Monitoring and Diagnosis of the Physical Dynamics of the Estuary of Aveiro

2008-2009

Oreo2

Self-patternable organic/inorganic hybrids for low cost integrated optics devices

2008-2010

SenRONS

Optical fibre sensors to determine reactive oxygen and nitric oxide in biological systems

2008-2011

Motion

Monitoring and compensaTion of Impairments in Optical Networks

2007-2010

Welding

Optical fibre Bragg sensors for friction stir welding (FSW) and laser beam welding (LBW) modeling

2007-2009

Biopelvic

Study of Female Pelvic Floor Disorders

2007-2010

Optic-Algae

Hybrid photobioreactors containing microstructured optical fibres for operations with microalgae

2007-2010

SmartBio

HIP Femoral Prosthesis for in vivo loosening data acqusition

2007-2010

NextGenPCF

Next Generation Photonic Crystal Fibres

2006-2009

Team
002

Laboratories

Laboratory of Microfabrication

Imaging Laboratory

Publications

CAP Publications

View all Publications

2022

Long-Period Fiber Gratings Coated with Poly(ethylene glycol) as Relative Humidity Sensors

Authors
Dias, B; de Almeida, JMMM; Coelho, LCC;

Publication
U.Porto Journal of Engineering

Abstract
Relative humidity is an important parameter in controlled environments and is typically monitored using low-cost electrochemical sensors with low resolution and accuracy. This kind of sensors cannot not be implemented in harsh or explosive environments (as in pyrotechnic facilities) due to electrical discharges, or in marine structures where the oxidation of the sensing probe materials changes the sensing response). In these cases, fiber optic sensors can provide solutions due to their intrinsic properties, such as immunity to electromagnetic interference and resistance in harsh environments. This work presents preliminary results regarding the steps of the fabrication of Long-Period Fiber Gratings, the coating processes with a thin layer of poly(ethylene glycol) (PEG) and its sensing performance to relative humidity, displaying a from 60 to 100%sensitivity of 0.6 nm/%RH in the range of 80 to 100%RH.

2022

Femtosecond laser micromachining of suspended silica-core liquid-cladding waveguides inside a microfluidic channel

Authors
Maia, JM; Viveiros, D; Amorim, VA; Marques, PVS;

Publication
OPTICS AND LASERS IN ENGINEERING

Abstract
This work addresses the fabrication of straight silica-core liquid-cladding suspended waveguides inside a microfluidic channel through fs-laser micromachining. These structures enable the reconfiguration of the waveguide's mode profile and enhance the evanescent interaction between light and analyte. Further, their geometry resembles a tapered optical fiber with the added advantage of being monolithically integrated within a microfluidic platform. The fabrication process includes an additional post-processing thermal treatment responsible for smoothening the waveguide surface and reshaping it into a circular cross-section. Suspended waveguides with a minimum core diameter of 3.8 µm were fabricated. Their insertion losses can be tuned and are mainly affected by mode mismatch between the coupling and suspended waveguides. The transmission spectrum was studied and it was numerically confirmed that it consists of interference between the guided LP01 mode and uncoupled light and of modal interference between the LP01 and LP02 modes. © 2022 Elsevier Ltd

2022

Differential Refractometric Biosensor for Reliable Human IgG Detection: Proof of Concept

Authors
Mendes, JP; Coelho, LCC; Jorge, PAS; Pereira, CM;

Publication
BIOSENSORS-BASEL

Abstract
A new sensing platform based on long-period fiber gratings (LPFGs) for direct, fast, and selective detection of human immunoglobulin G (IgG; Mw = 150 KDa) was developed and characterized. The transducer's high selectivity is based on the specific interaction of a molecularly imprinted polymer (MIPs) design for IgG detection. The sensing scheme is based on differential refractometric measurements, including a correction system based on a non-imprinted polymer (NIP)-coated LPFG, allowing reliable and more sensitive measurements, improving the rejection of false positives in around 30%. The molecular imprinted binding sites were performed on the surface of a LPFG with a sensitivity of about 130 nm/RIU and a FOM of 16 RIU-1. The low-cost and easy to build device was tested in a working range from 1 to 100 nmol/L, revealing a limit of detection (LOD) and a sensitivity of 0.25 nmol/L (0.037 mu g/mL) and 0.057 nm.L/nmol, respectively. The sensor also successfully differentiates the target analyte from the other abundant elements that are present in the human blood plasma.

2022

Comprehensive comparison of linear and non-linear methodologies for lithium quantification in geological samples using LIBS

Authors
Ferreira, MFS; Capela, D; Silva, NA; Goncalves, F; Lima, A; Guimaraes, D; Jorge, PAS;

Publication
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY

Abstract
Laser-induced breakdown spectroscopy allows fast chemical analysis of light elements without significant sample preparation, turning it into a promising technique for on-site mining operations. Still, the performance for quantification purposes remains its major caveat, obstructing a broader application of the technique. In this work, we present an extensive comparison of the performances of distinct algorithms for quantification of Lithium in a mining prospection stage, using spectra acquired with both a commercial handheld device and a laboratory prototype. Covering both linear and non-linear methodologies, the results show that, when covering a wide range of concentrations typical on a mining operation, non-linear methodologies manage to achieve errors compatible with a semi-quantitative performance, offering performances better than those obtained with linear methods, which are more affected by saturation and matrix effects. The findings enclosed offer support for future applications in the field and may possibly be generalized for other elements of interest in similar mining environments.

2022

Sputtering Deposition of TiO2 Thin Film Coatings for Fiber Optic Sensors

Authors
Silva, D; Monteiro, CS; Silva, SO; Frazao, O; Pinto, JV; Raposo, M; Ribeiro, PA; Serio, S;

Publication
PHOTONICS

Abstract
Thin films of titanium dioxide (TiO2) and titanium (Ti) were deposited onto glass and optical fiber supports through DC magnetron sputtering, and their transmission was characterized with regard to their use in optical fiber-based sensors. Deposition parameters such as oxygen partial pressure, working pressure, and sputtering power were optimized to attain films with a high reflectance. The films deposited on glass supports were characterized by UV-Vis spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). Regarding the deposition parameters, all three parameters were tested simultaneously, changing the working pressure, the sputtering power, and the oxygen percentage. It was possible to conclude that a lower working pressure and higher applied power lead to films with a higher reflectance. Through the analysis of the as-sputtered thin films using X-ray diffraction, the deposition of both Ti and TiO2 films was confirmed. To study the applicability of TiO2 and Ti in fiber sensing, several thin films were deposited in single mode fibers (SMFs) using the sputtering conditions that revealed the most promising results in the glass supports. The sputtered TiO2 and Ti thin films were used as mirrors to increase the visibility of a low-finesse Fabry–Perot cavity and the possible sensing applications were studied.

Supervised Theses

2021

Scalable Digital Baseband Beamformer for Satellite Reception

Author
Helder Henrique Avelar

Institution
UP-FEUP

2021

Regulatory Design with Storage Systems: Assessment of Operational, Market and Economic Features

Author
Igor Roberto Rezende e Castro de Abreu

Institution
UP-FEUP

2021

Implementação de ferramentas de qualidade em processos industriais

Author
Maria Francisca Bernardino dos Santos Monteiro

Institution
UP-FEUP

2021

SPOT – jogo sério baseado em realidade aumentada para a prevenção do melanoma

Author
Ana Catarina Rodrigues Ferreira

Institution
UP-FEUP

2021

Tactical sales and Operations Planning: quantitative decision-making approaches for integrated planning

Author
Daniel Filipe Conceição Pereira

Institution
UP-FEUP

Facts & Figures

36Researchers

2016

14Senior Researchers

2016

3R&D Employees

2020

Contacts