Title

Embeddable Fiber Optic Strain Sensor for Structural Monitoring

Editor(s)

Lynch, Jerome P. and Yun, Chung-Bang and Wang, Kon-Well

Abstract

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 °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.

Department(s)

Mechanical and Aerospace Engineering

Second Department

Electrical and Computer Engineering

Keywords and Phrases

Fiber Optic; Sensors; Structural Monitoring; Single Mode Fibers; Fiber Optics Sensors; Fusion Splicing; Lasers; Micromachining; Carbon; Composites

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2013 SPIE, All rights reserved.

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