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Journal of Undergraduate Research

Keywords

relief fabry-perot, Fiber Bragg Gratings, FBG, strain sensing

College

Ira A. Fulton College of Engineering and Technology

Department

Electrical and Computer Engineering

Abstract

The use of optical fiber as a sensing instrument has become an important application in the optics field. Due to previous research conducted here at BYU1 it is now possible to fabricate Surface Relief Fiber Bragg Gratings, SR-FBGs, which can be used as a temperature or strain sensing instrument. This sensor is lightweight and immune to electromagnetic interference because of the inherent attributes associated with optical fiber. The type of FBG I wish to research, the FP-FBG, will be much more sensitive than a standard SR-FBG. Another quality of optical sensors is the fact that they are so compact they can be embedded into structures and used to sense changes in the structure’s integrity. A potential application of Short Surface Relief Fabry-Perot Fiber Bragg Gratings, FP-FBG, is to install them in key points during the building process of any structure such as a bridge. Once the structure is completed a measurement may be taken at the key areas to give a baseline reading. Periodic measurements can be taken and with the data taken it can be determined if the structural integrity has been maintained in that key area or if repairs are necessary. This is just an example of one of the many different uses of this sensor.

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