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High-Temperature Sensing Using Surface Relief Fiber Bragg Gratings

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6 Author(s)
T. L. Lowder ; Electr. Eng. Dept., Brigham Young Univ., Provo, UT, USA ; K. H. Smith ; B. L. Ipson ; A. R. Hawkins
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We present a new type of fiber Bragg grating (FBG) that can be used in high-temperature sensing applications. We use the flat side of a D-shaped optical fiber as a platform to etch the grating into the surface of the fiber. Because the grating becomes a physical feature of the fiber, it is not erased at high temperatures as are standard FBGs. These surface relief fiber Bragg gratings will operate up to high temperatures. We provide a brief explanation of the fabrication process and present our results for operation up to 1100 ^\circ C.

Published in:

IEEE Photonics Technology Letters  (Volume:17 ,  Issue: 9 )