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Optics Letters

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  • Vol. 37, Iss. 13 — Jul. 1, 2012
  • pp: 2703–2705

Fiber-optic vector vibroscope

Tuan Guo, Libin Shang, Yang Ran, Bai-Ou Guan, and Jacques Albert  »View Author Affiliations


Optics Letters, Vol. 37, Issue 13, pp. 2703-2705 (2012)
http://dx.doi.org/10.1364/OL.37.002703


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Abstract

A directional vibration sensor based on polarization-controlled cladding-to-core recoupling is demonstrated. A compact structure in which a short section of multi-mode fiber (MMF) stub containing a weakly tilted fiber Bragg grating (TFBG) is spliced to another single-mode fiber without any lateral offset. Multiple core modes of the MMF are coupled at the junction and appear as well defined resonances in reflection from the TFBG. Some of those resonances exhibit a strong polarization and bending dependence. Both the orientation and the amplitude of the vibrations can be determined unambiguously via dual-path power detection of the orthogonal-polarimetric lowest order LP1n modes. Meanwhile, the unwanted power fluctuations and temperature perturbations can be referenced out by monitoring the fundamental LP01 mode resonance.

© 2012 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: April 27, 2012
Revised Manuscript: May 15, 2012
Manuscript Accepted: May 23, 2012
Published: June 26, 2012

Citation
Tuan Guo, Libin Shang, Yang Ran, Bai-Ou Guan, and Jacques Albert, "Fiber-optic vector vibroscope," Opt. Lett. 37, 2703-2705 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-13-2703

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