Optoelectronics and Measurement Techniques

A comprehensive photoluminescence (PL) system Fluorolog-QM by Horiba for material characterization.

Time-correlated single-photon counting (TCSPC) system from Becker & Hickl including e.g. SPC-130INXX TCSPC Module, and PM-100-50C peltier cooled Hybrid GaAs Photodetector. The system is configured for blood perfusion measurements by diffuse optical correlation technique.

Arbin LBT21084UC battery testing system with 16 channels, voltage ± 5 V, and support for any battery chemistry.

Sliz, Rafal; Molaiyan, Palanivel; Fabritius, Tapio; Lassi, Ulla (2022) Printed electronics to accelerate solid-state battery development. - Nano Express 3 (2), 021002 . https://doi.org/10.1088/2632-959X/ac5d8e

Asgari, Somayyeh; Fabritius, Tapio (2022) Graphene-Based Multiband Chiral Metamaterial Absorbers Comprised of Square Split-Ring Resonator Arrays With Different Numbers of Gaps, and Their Equivalent Circuit Model. - IEEE Access 10, 63658 - 63671 . https://doi.org/10.1109/ACCESS.2022.3183272

Vesavaara, Ilkka; Mäkynen, Anssi; Perämäki, Paavo (2022) Properties and suitability of liquid electrode plasma optical emission spectrometry (LEP-OES) for the determination of potassium, lithium, iron, and zinc in aqueous sample solutions. - Instrumentation science and technology 50 (2), 146-160 . https://doi.org/10.1080/10739149.2021.1974473

The present work is aimed at the investigation of limitations, improving, and discovering new potentials of currently existing methods of laser speckle contrast imaging. In particular, the influence of effects of non-ergodicity on the results of speckle contrast analysis was investigated using the phantom and animal models. It was shown that the presence of a thin static layer above the dynamic layer does not introduce significant errors in speckle contrast calculation. The simple approach for the adjustment of speckle contrast values in different types of brain vasculature during transcranial visualisation was introduced. For the first time, the protocol for the monitoring of skin acute vascular permeability reaction in response to simultaneous application of tree different chemical substances has been described. Moreover, in a new approach, the optical setup combining a hyperspectral camera and multi-wavelength light source was implemented for the depth-resolved blood flow and perfusion assessment. The proposed technique was applied for skin perfusion monitoring. Finally, the unprecedented use of laser speckle contrast imaging was introduced for handwriting pressure and kinematics evaluation.

Dissertation

This thesis reports on studies of the fundamental interaction dynamics of human red blood cells (RBC) by optical tweezers (OT) and the application of the OT-based RBC-investigation protocol in facilitating blood photobiomodulation research at a single-cell level.

Interaction dynamics and the role of intercellular interaction time and mutual contact in RBC aggregation and OT-induced disaggregation in autologous plasma are presented as new evidence, clarifying the RBC interaction mechanism. The rheological alterations of RBC induced by laser radiation with various irradiation conditions were thoroughly explored at a single-cell level for the first time to provide a better understanding of the underlying mechanism of photobiomodulation on blood. This study demonstrated the beneficial effects of low-level laser irradiation by  improving RBC deformability and preserving cell shape in a harsh environment.

Dissertation

Innovations for ice and snow management

The purpose of the project is to increase the number of actors involved in innovation activities in the Interreg North Program area by developing and validating solutions to reduce the damage caused by ice and snow loads.

https://iceproofarctic.eu/

The ultimate goal is to find the way to determine the most subtle changes in cells’ or organelles utilizing a new paradigm in modern optics and photonics, known as a twisted light, i.e. the light carrying orbital angular momentum. The alterations of properties of twisted light, serving as the markers of certain diseases, provide a unique opportunity to detect cancer and other tissue malformations with the sensitivity beyond the conventional biopsy modalities.

Project in the Academy of Finland database: Smart Optical Biopsy with Twisted Light

521109A Electrical Measurement Principles, 5 ECTS

521241A Optical systems, 5 ECTS

521092A Electronic Measurement Techniques, 5 ECTS

521242A Introduction to Biomedical Engineering, 5 ECTS

521176A Laboratory Works of Electronic Measurement Techniques, 5 ECTS

521089S Printed Electronics, 5 ECTS

521093S Biomedical Instrumentation, 5 ECTS

521096S Measuring Systems, 5 ECTS

521097S Wireless Measurements, 5 ECTS

521098S Testing Techniques of Electronics and Printed Electronics, 5 ECTS

521115S EMC Design, 5 ECTS

521124S Electronic Sensors, 5 ECTS

521240S Biophotonics and Biomedical Optics, 5 ECTS

521108S Optical Measurement Technology Exercise, 5-10 ECTS

521175S Printed electronics design and construction exercise, 5 ECTS

521168S Wireless Measurements Project, 5-10 ECTS

Collaboration with companies / Research collaboration

PrintoCent - Boosting the industrialization and commercialization of printed intelligence

Photonics Finland - Developing new business and research opportunities, and helping realize the full potential of the photonics industry in Finland

Oulu BioImaging OBI - Gathering several outstanding biologically, medically and technically oriented imaging laboratories  with the aim to cover recent advances in microscopy, spectroscopy, optical tomography, photonics, pattern recognition and image analysis.

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Spin-offs

Sensmet Ltd

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Alumni

Our alumni/alumnae working in companies, industry or other research and education institutes.

Optoelectronics and Measurement Techniques Unit
Faculty of Information Technology and Electrical Engineering
P.O.Box 4500
FI-90014 University of Oulu

University of Oulu
Faculty of Information Technology and Electrical Engineering
Optoelectronics and Measurement Techniques Unit
Erkki Koiso-Kanttilankatu 3
Door E
90570 Oulu
Finland

Map of Linnanmaa campus (Door E at position F9)

Welcome to the campuses of the University of Oulu

Professors
Fabritius Tapio (Head of the Research Unit)
Meglinski Igor
Sliz Rafal (Assistant Professor [Tenure Track])
Myllylä Teemu (Associate Professor [Tenure Track]) / MIPT unit
Myllylä Risto (Professor Emeritus)
Alasaarela Esko (Professor Emeritus)

Senior research fellows, adjunct professors
Mäkynen Anssi
Bykov Alexander

University lecturers
Schuss Christian

Postdoctoral researchers
Lauri Janne
Lopushenko Ivan
Vilmi Pauliina
Zhao Zuomin
Zherebtsov Evgenii

Researchers
Asgari Somayyeh
Avsievich Tatiana
Hannila Esa
Juttula Harri
Kaikkonen Ville
Kukkola Katri
Molkoselkä Eero
Moradi Sadegh
Omidali Mohammadreza
Roy Ivy
Sdobnov Anton
Sieryi Oleksii
Vihriälä Erkki
Zienkiewicz Aleksandra
Zhu Ruixue

Assisting personnel in research and education
Sorvoja Hannu (Laboratory manager)
Remes Kari (Project manager)
Garcia Hinojosa Maximiliano (Research trainee)
Illikainen Sofia (Research trainee)
Javanainen Ville (Research trainee)
Kaikkonen Mikko (Research trainee)
Ranasinghe Arachchilage Kosala (University trainee)