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
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.
© 2016 Society of Photo-Optical Instrumentation Engineers
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