17 October 2012 Two-dimensional fiber-optic vector vibroscope using only one multi-mode tilted fiber grating
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Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 842122 (2012) https://doi.org/10.1117/12.970483
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China
Abstract
Orientation-recognized two-dimensional vibration sensor based on a polarization-controlled cladding-to-core recoupling is demonstrated experimentally. A compact structure in which a short section of multi-mode fiber stub containing a weakly tilted fiber Bragg grating (TFBG) is spliced to another single-mode fiber without any lateral offset. Several well defined lower-order cladding resonances in reflection show different polarization dependence due to the tilted grating vector excitation. Both orientation and amplitude of the vibration can be determined unambiguously via dual-path power detection of the orthogonal-polarimetric odd-cladding-modes. Meanwhile, the unwanted power fluctuations and temperature perturbations can be definitely removed via core mode monitoring.
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Tuan Guo, Tuan Guo, Yang Ran, Yang Ran, Yannan Tan, Yannan Tan, Shuai Gao, Shuai Gao, Lipeng Sun, Lipeng Sun, Bai-Ou Guan, Bai-Ou Guan, Jacques Albert, Jacques Albert, } "Two-dimensional fiber-optic vector vibroscope using only one multi-mode tilted fiber grating", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 842122 (17 October 2012); doi: 10.1117/12.970483; https://doi.org/10.1117/12.970483
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