All Outputs (10)

Investigation on the sensitivity of an etched graded-index multi-mode fiber to refractive index and temperature for mode-multiplexed fiber optic sensor applications (2020)
Conference Proceeding
Alwis, L., Bremer, K., & Roth, B. (2020). Investigation on the sensitivity of an etched graded-index multi-mode fiber to refractive index and temperature for mode-multiplexed fiber optic sensor applications. In Optical Fiber Sensors Conference 2020 Special Edition. https://doi.org/10.1364/OFS.2020.T3.7

The work presents an investigation on the utilization of an etched Graded-Index (GI)-Multi-Mode Fiber (MMF) for mode-multiplexed Fiber Optic Sensor (FOS) applications and the simultaneous measurement of the Surrounding Refractive Index (SRI) The work... Read More about Investigation on the sensitivity of an etched graded-index multi-mode fiber to refractive index and temperature for mode-multiplexed fiber optic sensor applications.

Evaluation of the potential of Fiber Optic Sensors for Structural Health Monitoring of Carbon Fiber-Reinforced Concrete Composites (2020)
Conference Proceeding
Alwis, L., Bremer, K., Weigand, F., Kuhne, M., Helbig, R., & Roth, B. (2020). Evaluation of the potential of Fiber Optic Sensors for Structural Health Monitoring of Carbon Fiber-Reinforced Concrete Composites. In G. Cranch, A. Wang, M. Digonnet, & P. Dragic (Eds.), Optical Fiber Sensors Conference 2020 Special Edition. https://doi.org/10.1364/OFS.2020.W4.66

The paper presents an evaluation on the structural and operational potential of fiber optic sensors (FOSs) to be utilized for real-time continuous structural health monitoring (SHM) of fiber-reinforced carbon concrete composites (C3).

Feasibility Study on the Potential of Fibre Bragg Gratings for Thermal Monitoring of Cylindrical Lithium-Ion Batteries (2020)
Conference Proceeding
Alcock, K., Grammel, M., Binetti, L., Gonzales Vila, A., Goh, K., & Alwis, L. (2020). Feasibility Study on the Potential of Fibre Bragg Gratings for Thermal Monitoring of Cylindrical Lithium-Ion Batteries. In G. Cranch, A. Wang, M. Digonnet, & P. Dragic (Eds.), Optical Fiber Sensors Conference 2020 Special Edition. https://doi.org/10.1364/OFS.2020.T3.49

Bragg Gratings were used to monitor thermal fluctuations of a Lithium-Ion battery by attaching the sensors outside the casing of the battery. Results are comparable to that obtained from thermo-couples and thus verifies its potential.

Design a Monitoring System For Pathogen Detection Using Microfluidic Technology (2020)
Conference Proceeding
Kerrouche, A., Lithgow, J., & Alwis, L. (2020). Design a Monitoring System For Pathogen Detection Using Microfluidic Technology. In G. Cranch, A. Wang, M. Digonnet, & P. Dragic (Eds.), Optical Fiber Sensors Conference 2020 Special Edition. https://doi.org/10.1364/OFS.2020.Th4.6

Waterborne pathogens affect all waters globally and proceed to be a ongoing concern. The act to provide clean water by filtration is effective although has concerns. Previous methods for detection and removal of pathogens consist of a... Read More about Design a Monitoring System For Pathogen Detection Using Microfluidic Technology.

All-Optical Planar Polymer Waveguide-Based Biosensor Chip Designed for Smartphone-Assisted Detection of Vitamin D (2020)
Journal Article
Walter, J., Alwis, L. S. M., Roth, B., & Bremer, K. (2020). All-Optical Planar Polymer Waveguide-Based Biosensor Chip Designed for Smartphone-Assisted Detection of Vitamin D. Sensors, 20(23), Article 6771. https://doi.org/10.3390/s20236771

An all-optical plasmonic sensor platform designed for smartphones based on planar-optical waveguide structures integrated in a polymer chip is reported for the first time. To demonstrate the applicability of the sensor system for biosensing purposes,... Read More about All-Optical Planar Polymer Waveguide-Based Biosensor Chip Designed for Smartphone-Assisted Detection of Vitamin D.

Monitoring of the Critical Meniscus of Very Low Liquid Volumes Using an Optical Fiber Sensor (2020)
Journal Article
Binetti, L., Del Villar, I., Prabuddha Dissanayake, K., Stankiewicz, A., Sun, T., Grattan, K. T. V., & Alwis, L. S. M. (2020). Monitoring of the Critical Meniscus of Very Low Liquid Volumes Using an Optical Fiber Sensor. IEEE Sensors Journal, 20(20), 12232-12240. https://doi.org/10.1109/JSEN.2020.2999537

A novel sensing system based on single mode optical fiber in reflective configuration has been developed to measure the critical meniscus height (CMH) of low volumes of liquids, which is then used to calculate the contact angle. The sensing system ha... Read More about Monitoring of the Critical Meniscus of Very Low Liquid Volumes Using an Optical Fiber Sensor.

Optical fibre thermometry using ratiometric green emission of an upconverting nanoparticle- polydimethylsiloxane composite (2020)
Journal Article
Kumar, R., Binetti, L., Nguyen, .. H., Alwis, L. S., Sun, T., & Grattan, K. T. (2020). Optical fibre thermometry using ratiometric green emission of an upconverting nanoparticle- polydimethylsiloxane composite. Sensors and Actuators A: Physical, 312, Article 112083. https://doi.org/10.1016/j.sna.2020.112083

The thermally coupled green band emission from excited Er 3+ ions has been used in the past to create optical thermometers, by doping the material in various types of media, particularly glasses. Glasses are known to be excellent hosts for Er 3+ ions... Read More about Optical fibre thermometry using ratiometric green emission of an upconverting nanoparticle- polydimethylsiloxane composite.

SPR biosensor based on polymer multi-mode optical waveguide and nanoparticle signal enhancement (2020)
Journal Article
Gabriela Walter, J., Eilers, A., Alwis, L., Wilhelm Roth, B., & Bremer, K. (2020). SPR biosensor based on polymer multi-mode optical waveguide and nanoparticle signal enhancement. Sensors, 20(10), Article 2889. https://doi.org/10.3390/s20102889

We present a surface plasmon resonance (SPR) biosensor that is based on a planar-optical multi-mode (MM) polymer waveguide structure applied for the detection of biomolecules in the lower nano-molar (nM) range. The basic sensor shows a sensitivity of... Read More about SPR biosensor based on polymer multi-mode optical waveguide and nanoparticle signal enhancement.

Micro-structured optical multi-mode fibers for sensing applications (2020)
Conference Proceeding
Bremer, K., Alwis, L., & Roth, B. (2020). Micro-structured optical multi-mode fibers for sensing applications. In Proceedings Volume 11355, Micro-Structured and Specialty Optical Fibres VI. https://doi.org/10.1117/12.2563899

Grating-based Fiber Optic Sensors (FOSs), i.e. relying on Bragg Gratings (BGs), Long Period Gratings (LPGs), Tilted Fiber BGs (TFBGs), have seen a popularity in recent years for sensing applications, however, most of these are inscribed on Single-Mod... Read More about Micro-structured optical multi-mode fibers for sensing applications.

Towards Mode-Multiplexed Fiber Sensors: An Investigation on the Spectral Response of Etched Graded Index OM4 Multi-Mode Fiber with Bragg grating for Refractive Index and Temperature Measurement (2020)
Journal Article
Bremer, K., Alwis, L. S. M., Zheng, Y., & Roth, B. W. (2020). Towards Mode-Multiplexed Fiber Sensors: An Investigation on the Spectral Response of Etched Graded Index OM4 Multi-Mode Fiber with Bragg grating for Refractive Index and Temperature Measurement. Applied Sciences, 10(1), Article 337. https://doi.org/10.3390/app10010337

An investigation on the feasibility of utilizing Mode Division Multiplexing (MDM) for simultaneous measurement of Surrounding Refractive Index (SRI) and temperature using a single sensor element based on an etched OM4 Graded Index Multi Mode Fiber (G... Read More about Towards Mode-Multiplexed Fiber Sensors: An Investigation on the Spectral Response of Etched Graded Index OM4 Multi-Mode Fiber with Bragg grating for Refractive Index and Temperature Measurement.