Intensity-modulated PM-PCF Sagnac loop in a DWDM setup for strain measurement
Journal Article
Alwis, L., Madry, M., & Beres-Pawlik, E. (2019)
Intensity-modulated PM-PCF Sagnac loop in a DWDM setup for strain measurement. Applied Sciences, 9(11), https://doi.org/10.3390/app9112374
A novel intensity-modulated Sagnac loop sensor based on polarization-maintaining photonic crystal fiber (PM-PCF) in a setup with a dense wavelength division multiplexer (DWDM)...
Simultaneous Measurement of Temperature and Relative Humidity Using a Dual-Wavelength Erbium-Doped Fiber Ring Laser Sensor
Journal Article
Mądry, M., Alwis, L., Binetti, L., Pajewski, Ł., & Bereś-Pawlik, E. (2019)
Simultaneous Measurement of Temperature and Relative Humidity Using a Dual-Wavelength Erbium-Doped Fiber Ring Laser Sensor. IEEE Sensors Journal, 19(20), 9215-9220. https://doi.org/10.1109/JSEN.2019.2922041
A fiber ring laser sensor setup utilizing FBGs (Fiber Bragg Gratings) for simultaneous measurement of ambient temperature and relative humidity (RH) is presented. Two FBGs are...
Optical Fiber-Based Heavy Metal Detection Using the Localized Surface Plasmon Resonance Technique
Journal Article
Dhara, P., Kumar, R., Binetti, L., Nguyen, H. T., Alwis, L. S., Sun, T., & Grattan, K. T. V. (2019)
Optical Fiber-Based Heavy Metal Detection Using the Localized Surface Plasmon Resonance Technique. IEEE Sensors Journal, 19(19), 8720-8726. https://doi.org/10.1109/JSEN.2019.2921701
An innovative, reflection-based localized surface plasmon resonance (LSPR) fiber-optic sensor has been developed and demonstrated to detect the concentration of several heavy ...
Optical Fiber Sensor Design for Ground Slope Movement Monitoring for Railway Safety Operations
Conference Proceeding
Hook, D., Laing, W., Kerrouche, A., Barreto Gonzalez, D., & Alwis, L. S. (2018)
Optical Fiber Sensor Design for Ground Slope Movement Monitoring for Railway Safety Operations. In 2018 IEEE Sensors Proceedings. , (1-4). https://doi.org/10.1109/ICSENS.2018.8589835
Scour and slope instability are a major issue in keeping the railway structures safe and operational. Conventional measurement techniques do not allow real-time monitoring of ...
Graphene-Oxide and Hydrogel Coated FBG-Based pH Sensor for Biomedical Applications
Journal Article
Binetti, L., Stankiewicz, A., & Alwis, L. S. M. (2018)
Graphene-Oxide and Hydrogel Coated FBG-Based pH Sensor for Biomedical Applications. Proceedings, 2(13), 789. https://doi.org/10.3390/proceedings2130789
A hydrogel coated fibre grating-based pH sensor for biomedical applications has been realised, where Graphene Oxide (GO) had been used to enhance the bonding between the coati...
Smart Jewellery: The Future Of Health Monitoring
Presentation / Conference
Alwis, L. S., & Vones, K. (2018, November)
Smart Jewellery: The Future Of Health Monitoring. Paper presented at U!REKA: Urban Research and Education Knowledge Alliance 2018, Frankfurt, Germany
The project has revolved around developing a responsive, wearable prototype object that creates playful interactions by sensing bodily and environmental stimuli, and expresses...
Evaluating the Performance of Functionalized Carbon Structures with Integrated Optical Fiber Sensors under Practical Conditions
Journal Article
Bremer, K., Alwis S. M., L., Weigand, F., Kuhne, M., Zheng, Y., Krüger, M., …Roth, B. (2018)
Evaluating the Performance of Functionalized Carbon Structures with Integrated Optical Fiber Sensors under Practical Conditions. Sensors, 18(11), 3923. https://doi.org/10.3390/s18113923
An Optical Frequency Domain Reflectometry (OFDR) based fiber optic sensor scheme “embedded” in concrete for the purpose of structural health monitoring (SHM) of carbon concret...
Integrated fiber Bragg grating incorporated textile carbon reinforcement structures
Conference Proceeding
Alwis, L., Bremer, K., Zheng, Y., Weigand, F., Kuhne, M., Helbig, R., & Roth, B. (2017)
Integrated fiber Bragg grating incorporated textile carbon reinforcement structures. In 2017 IEEE Sensorshttps://doi.org/10.1109/ICSENS.2017.8234106
An optical fibre Bragg grating (FBG) based strain sensor network incorporated in a functionalized textile-based carbon structure (FTCS) that can be used for structural health ...
Innovation in corrosion monitoring in sewers - use of novel photonic sensors for humidity measurements in gravity sewers
Journal Article
Bustamante, H., Alwis, L. S. M., Grattan, K. T. V., Sun, T., Vorreiter, L., & González, J. (2017)
Innovation in corrosion monitoring in sewers - use of novel photonic sensors for humidity measurements in gravity sewers. Water e-journal, 2(4), 1-6. https://doi.org/10.21139/wej.2017.038
Humidity plays a key role in microbiologically induced corrosion of concrete gravity sewers. Minor reductions in humidity can reduce corrosion rates. No reliable long lived (>...
Fibre optic strain sensor for carbon concrete composites
Conference Proceeding
Bremer, K., Weigand, F., Zheng, Y., Alwis, L. S. M., Kuhne, M., Helbig, R., & Roth, B. (2017)
Fibre optic strain sensor for carbon concrete composites. In 2017 European Conference on Lasers and Electro-Optics and European Quantum Electronics Conference
The work introduces textile based carbon structures that are functionalized with optical fibre sensors for structural health monitoring (SHM) of concrete based composites. The...