Embeddable Fiber Optic Strain Sensor for Structural Monitoring
Lynch, Jerome P. and Yun, Chung-Bang and Wang, Kon-Well
An extrinsic Fabry-Perot interferometric (EFPI) fiber optic sensor is presented for measurement of strain at high ambient temperatures. The sensor is fabricated using a femto-second (fs) laser. The EFPI sensor is fabricated by micromachining a cavity on the tip of a standard single-mode fiber and is then self-enclosed by fusion splicing another piece of singlemode fiber. The fs-laser based fabrication makes the sensor thermally stable to sustain temperatures as high as 800 Â°C. The sensor is relatively insensitive towards the temperature as compared to its response towards the applied strain. The sensor can be embedded in Carbon fiber/Bismaleimide (BMI) composite laminates for strain monitoring at high ambient temperatures.
A. Kaur et al., "Embeddable Fiber Optic Strain Sensor for Structural Monitoring," SPIE Proceedings, SPIE, Jan 2013.
The definitive version is available at http://dx.doi.org/10.1117/12.2009462
Mechanical and Aerospace Engineering
Electrical and Computer Engineering
Keywords and Phrases
Fiber Optic; Sensors; Structural Monitoring; Single Mode Fibers; Fiber Optics Sensors; Fusion Splicing; Lasers; Micromachining; Carbon; Composites
Article - Journal
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