Lasers, Fiber Optics, and Communications

Terahertz-range interrogated grating-based two-axis optical fiber inclinometer

[+] Author Affiliations
Zhen Chen, Tao Wei

University of Rhode Island, Department of Electrical, Computer and Biomedical Engineering, Kelley Annex A-220, 4 East Alumni Avenue, Kingston, Rhode Island 02881, United States

Gerald Hefferman

University of Rhode Island, Department of Electrical, Computer and Biomedical Engineering, Kelley Annex A-220, 4 East Alumni Avenue, Kingston, Rhode Island 02881, United States

Brown University, Warren Alpert Medical School, 222 Richmond Street, Providence, Rhode Island 02903, United States

Lei Yuan, Yang Song

Clemson University, Department of Electrical and Computer Engineering, Room 147, AMRL Building, 91 Technology Drive, Anderson, South Carolina 29625, United States

Opt. Eng. 55(2), 026106 (Feb 02, 2016). doi:10.1117/1.OE.55.2.026106
History: Received December 6, 2015; Accepted January 12, 2016
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Abstract.  We report a two-axis fiber inclinometer fabricated using an ultraweak terahertz-range fiber Bragg grating. Three sensing grating structures were inscribed along a single-mode optical fiber using a femtosecond laser, bound together into a sensing array using thermoformed plastic, and fixed to a two-axis rotational stage. Inclination tests were performed in which the fiber was deflected from 0 to 1.7 deg. These tests were repeated at eight azimuthal angles in increments of 45 deg (from 0 to 315 deg). The standard deviation of the largest inclination angle error was 0.048 deg and the stability of the inclination angle was 0.030 deg.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Zhen Chen ; Gerald Hefferman ; Lei Yuan ; Yang Song and Tao Wei
"Terahertz-range interrogated grating-based two-axis optical fiber inclinometer", Opt. Eng. 55(2), 026106 (Feb 02, 2016). ; http://dx.doi.org/10.1117/1.OE.55.2.026106


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