Two-dimensional fiber-optic vector vibroscope using only one multi-mode tilted fiber grating

Tuan Guo; Yang Ran; Yannan Tan; Shuai Gao; Lipeng Sun; Bai-Ou Guan; Jacques Albert

doi:10.1117/12.970483

17 October 2012 Two-dimensional fiber-optic vector vibroscope using only one multi-mode tilted fiber grating

Tuan Guo, Yang Ran, Yannan Tan, Shuai Gao, Lipeng Sun, Bai-Ou Guan, Jacques Albert

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.

Citation Download Citation

Tuan Guo, Yang Ran, Yannan Tan, Shuai Gao, Lipeng Sun, Bai-Ou Guan, and 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); https://doi.org/10.1117/12.970483

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