Cookies Policy
The website need some cookies and similar means to function. If you permit us, we will use those means to collect data on your visits for aggregated statistics to improve our service. Find out More
Accept Reject
  • Menu
About

About

Susana Novais is graduated in Biomedical Engineering from the Bragança Polytechnic Institute, Portugal. In 2019 she received the Ph.D. degree in Physical Engineering at the University of Aveiro, Portugal, on optical fiber sensors for challenging media. In last 5 years, she has published about 21 papers in international journal, book chapters and conference proceedings. Her field expertise is optical fiber sensors applied to the lithium ion batteries, optical fiber designs and their applications in chemically challenging media. She is currently an Assistant Researcher at the Center for Applied Photonics (CAP) at INESC TEC and her current research interests are optical fiber sensors for medical applications.

Interest
Topics
Details

Details

  • Nationality

    Portugal
  • Centre

    Applied Photonics
  • Contacts

    +351220402301
    susana.novais@inesctec.pt
003
Publications

2023

Measurement of Paracetamol Concentration Using an Erbium-Doped Fiber Ring Cavity

Authors
Soares, L; Perez Herrera, RA; Novais, S; Ferreira, A; Silva, S; Frazao, O;

Publication
PHOTONICS

Abstract
Process Analytical Technology (PAT) has been increasingly used in the pharmaceutical industry to monitor essential parameters in real-time during pharmaceutical processes. The concentration of Active Pharmaceutical Ingredients (APIs), such as paracetamol, is one of these parameters, and controlling its variations allows for optimization of the production process. In this study, a refractometric sensor, implemented by an interrogation system based on an Erbium-Doped Fiber Ring Cavity (EDFRC), was presented and experimentally demonstrated. The Cavity Ring proposed included a 1 x 3 coupler. One port of the coupler was used to increase the optical power of the system through a Fiber Bragg Grating (FBG), and the other two ports were used as sensing head and reference. The sensor detected variations of paracetamol concentration with a sensitivity of [(-1.00 +/- 0.05) x 10(-3)] nW/(g/kg) and a resolution of 5.53 g/kg. The results demonstrate the potential of this technology as a possible non-invasive PAT tool.

2023

Erbium-doped fiber ring cavity for the measurement of refractive index variations

Authors
Perez Herrera, RA; Soares, L; Novais, S; Frazão, O; Silva, S;

Publication
Proceedings of SPIE - The International Society for Optical Engineering

Abstract

2023

Measurement of paracetamol concentration using a fiber laser system

Authors
Soares, L; Perez-Herrera, RA; Novais, S; Ferreira, A; Frazao, O; Silva, S;

Publication
2023 IEEE 7TH PORTUGUESE MEETING ON BIOENGINEERING, ENBENG

Abstract
A linear fiber laser system for measurements of paracetamol concentration is experimentally demonstrated. The cavity is based on a fiber loop mirror and an FBG centered at 1567.8 nm. The sensing head corresponds to a refractometric sensor, whose which principle of operation is based on Fresnel reflection in the fiber tip (FBG side). The system works at detected variations of paracetamol concentrations with a sensitivity of [(8.74 +/- 0.34) x10(-5)] mu W/(g/kg) and a resolution of 2.77 g/kg. The results prove that the fiber laser system could be an asset for processing industries, specifically for non-invasive and real-time measurements of concentration.

2023

Transmissive glucose concentration plasmonic Au sensor based on unclad optical fiber

Authors
Cunha, C; Assuncao, AS; Monteiro, CS; Leitao, C; Mendes, JP; Silva, S; Frazao, O; Novais, S;

Publication
2023 IEEE 7TH PORTUGUESE MEETING ON BIOENGINEERING, ENBENG

Abstract
Using surface resonance (SPR) as a sensitivity enhancer, this work describes the development of a transmissive multimode optical fiber sensor with a gold (Au) thin film that measures glucose concentration. The fiber's cladding was initially removed, and an Au layer was then sputtered onto its surface to simultaneously excite SPR and reflect light, making the SPR sensor extremely sensitive to changes in the environment's refractive index. A range of glucose concentrations, from 0.0001 to 0.5000 g/ml, were tested on the sensor. A maximum sensitivity of 161.302 nm/(g/mL) was attained for the lowest glucose concentration, while the highest concentration yielded a sensitivity of 312.000 nm/(g/mL). The proposed sensor's compact size, high sensitivity, good stability and practicality make it a promising candidate for a range of applications, including detecting diabetes.

2023

Paracetamol concentration-sensing scheme based on a linear cavity fiber laser configuration

Authors
Soares, L; Perez Herrera, RA; Novais, S; Ferreira, A; Fraza, O; Silva, S;

Publication
OPTICAL FIBER TECHNOLOGY

Abstract
A paracetamol concentration-sensing scheme based on a linear cavity fiber laser configuration is demonstrated experimentally. The laser cavity has a fiber sensor at one end, that allows refractive index measurements. The refractometer consists of a cleaved fiber tip combined with an FBG functioning as a reflecting mirror. The combination of a fiber loop mirror at the other end allows to reflect all the light from the FBG and refractometer, forming a linear cavity. By measuring the intensity variation of the Fresnel reflection at the fiber-to-liquid interface, the measured concentration is linear and have a concentration sensitivity of [( - 8.74 & PLUSMN; 0.34) x 10-5 ] & mu;W/(g/kg), over a range of 52.61 to 219.25 g/kg, and with a resolution of 2.77 g/kg. The results obtained present high stability and prove the potential of the fiber laser system to performed realtime measurements of concentration, in a non-invasive way.