Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/7097
Title: Polarization-maintaining fiber-optic-grating vector vibroscope
Authors: Guo, T
Shang, L
Liu, F
Wu, C
Guan, BO
Tam, HY 
Albert, J
Keywords: Fiber optics sensors
Fiber Bragg gratings
Issue Date: 15-Feb-2013
Publisher: Optical Society of America
Source: Optics letters, 15 Feb. 2013, v. 38, no. 4, p. 531-533 How to cite?
Journal: Optics letters 
Abstract: A fiber-optic vector vibroscope based on orthogonal polarization cladding-to-core recoupling is demonstrated. A compact structure in which a short section of polarization-maintained (PM) fiber stub containing a straight fiber Bragg grating (FBG) is spliced to another single-mode fiber. Two well-defined orthogonally polarized cladding modes reflected by the PM-FBG are recoupled at the junction and the coupling intensity shows an extremely high sensitivity to bending in the corresponding orthogonal directions. Both the orientation and amplitude of the vibrations can be determined unambiguously via dual-path power detection of these recoupled orthogonal-polarimetric cladding modes (LP ₁,₁₂ and LP ₁,₁₃ ). Since spectral information is not required, temperature changes do not affect the sensor response, and power fluctuations can be referenced out by monitoring the power in the core mode (LP ₀,₁ ) resonance.
URI: http://hdl.handle.net/10397/7097
ISSN: 0146-9592
EISSN: 1539-4794
DOI: 10.1364/OL.38.000531
Rights: © 2013 Optical Society of America
This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-4-531. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
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