FBGS was recognized to be an integral part of the exhibit of the International Conference on Optical Fiber Sensors in JeJu, South Korea (OFS-25). The well-attended conference provided an excellent forum to present the state-of-the-art of the fiber optic sensing field and an effective platform for interactions among the international participants, who are involved in research, development, engineering and manufacturing of optical fiber sensors.
FBGS’s booth attracted unprecedented attention as it showcased its flagship Drawtower Grating (DTG®) technology with live demonstrations related to MultiCore Fiber (MCF) and new interrogator platforms.
The technical conference included a few talks referencing projects with promising experimental results, where FBGS’s sensors and measurement devices were utilized and shown to be advantageous. Here is a selected list of papers that drew warm attention from the audience:
- “Comprehensive Monitoring and Validation throughout the Aerospace Vehicle Life-Cycle Using Fiber Optic Sensing Technology” by Dr. Richards from NASA.
The unique combination of OFDR measurement techniques and low reflective gratings is especially useful for aerospace applications.
- “Mechanical strain-amplifying transducer for fiber Bragg grating sensors with applications in structural health monitoring” by Nawrot et al.
- “Fibre-optic sensor based measurements of low-induced vibration in a liquid metal cooled nuclear reactor set-up” by De Pauw et al.
The high strength character of DTGs was reported as a key feature because of thermal cycles (and shocks) during which induced strains as high as 1% due to thermal expansion are encountered. Furthermore, DTGs are found to be less prone to failure during installation and use compared to conventional “stripped and re-coated” FBGs. Both papers are from the Brussels Photonics Team (B-PHOT) in Belgium.
- “Characterization of bovine cartilage by fiber Bragg grating-based stress relaxation measurements” by Baier et al. from Munich University of Applied Sciences, Germany.
A fiber-based device for testing mechanical properties of cartilage was presented based on stepwise indentation into the tissue and observing of corresponding relaxation of the stress. The indenter tip consisted of a cleaved optical fiber including a fiber Bragg grating, which was used as the force sensor. The FAZ I4 unit was used for the interrogation of the fiber Bragg gratings, which provided accurate measurement information to feed into the two constant viscoelastic model.
For more details on these presentations and general conference program, please go to http://ofs-25.org/.