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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 16 — Aug. 12, 2013
  • pp: 19097–19102

VCSEL-powered and polarization-maintaining fiber-optic grating vector rotation sensor

Tuan Guo, Fu Liu, Fa Du, Zhaochuan Zhang, Chunjie Li, Bai-Ou Guan, and Jacques Albert  »View Author Affiliations

Optics Express, Vol. 21, Issue 16, pp. 19097-19102 (2013)

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A compact fiber-optic vector rotation sensor in which a short section of polarization-maintaining (PM) fiber stub containing a straight fiber Bragg grating (FBG) is spliced to another single mode fiber without any lateral offset is proposed and experimentally demonstrated. Due to the intrinsic birefringence of the PM fiber, two well-defined resonances (i.e. orthogonally polarized FBG core modes) with wavelength separation of 0.5 nm have been achieved in reflection, and they exhibit a high sensitivity to fiber rotation. Both the orientation and the angle of rotation can be determined unambiguously via simple power detection of the relative amplitudes of the orthogonal core reflections. Meanwhile, instead of using a broadband source (BBS), the sensor is powered by a commercial vertical cavity surface emitting laser (VCSEL) with the laser wavelength matched to the PM-FBG core modes, which enables the sensor to work at much higher power levels (~15 dB better than BBS). This improves the signal-to-noise ratio considerably (~50 dB), and makes a demodulation filter unnecessary. Vector rotation measurement with a sensitivity of 0.09 dB/deg has been achieved via cost-effective single detector real time power measurement, and the unwanted power fluctuations and temperature perturbations can be effectively referenced out.

© 2013 OSA

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2370) Fiber optics and optical communications : Fiber optics sensors

ToC Category:

Original Manuscript: June 26, 2013
Revised Manuscript: July 25, 2013
Manuscript Accepted: July 27, 2013
Published: August 2, 2013

Tuan Guo, Fu Liu, Fa Du, Zhaochuan Zhang, Chunjie Li, Bai-Ou Guan, and Jacques Albert, "VCSEL-powered and polarization-maintaining fiber-optic grating vector rotation sensor," Opt. Express 21, 19097-19102 (2013)

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