1 July 2015 Fiber-optic ultrasonic sensing systems using PS-FBG for damage monitoring in composite materials
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Proceedings Volume 9655, Fifth Asia-Pacific Optical Sensors Conference; 96553T (2015) https://doi.org/10.1117/12.2184405
Event: Fifth Asia Pacific Optical Sensors Conference, 2015, Jeju, Korea, Republic of
Abstract
Fiber-optic ultrasonic sensing systems have been developed for structural health monitoring of composite structures by introduction of phase-shifted fiber Bragg gratings (PS-FBGs). The systems can achieve the compatibility of high sensitivity and broadband performance. First, PS-FBG balanced sensing system was developed and succeeded in detection of small acoustic emission signals of composite laminates. Next, erbium fiber ring laser sensing system with inbuilt PS-FBG was developed. This system has high robustness due to its self-adjustment function for environmental disturbances and achieved much higher sensitivity and ultra-broadband respondency than piezoelectric ceramic sensors. These systems have large potential to realize the ultrasonic SHM.
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Yoji Okabe, Yoji Okabe, Qi Wu, Qi Wu, } "Fiber-optic ultrasonic sensing systems using PS-FBG for damage monitoring in composite materials", Proc. SPIE 9655, Fifth Asia-Pacific Optical Sensors Conference, 96553T (1 July 2015); doi: 10.1117/12.2184405; https://doi.org/10.1117/12.2184405
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