2 February 2016 Terahertz-range interrogated grating-based two-axis optical fiber inclinometer
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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 (SPIE)
Zhen Chen, Zhen Chen, Gerald Hefferman, Gerald Hefferman, Lei Yuan, Lei Yuan, Yang Song, Yang Song, Tao Wei, Tao Wei, } "Terahertz-range interrogated grating-based two-axis optical fiber inclinometer," Optical Engineering 55(2), 026106 (2 February 2016). https://doi.org/10.1117/1.OE.55.2.026106 . Submission:

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