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Optics Letters

Optics Letters


  • Vol. 36, Iss. 7 — Apr. 1, 2011
  • pp: 1191–1193

Method for suppressing the bias drift of interferometric all-fiber optic gyroscopes

Xinyue Wang, Changhong He, and Ziyu Wang  »View Author Affiliations

Optics Letters, Vol. 36, Issue 7, pp. 1191-1193 (2011)

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We propose a simple and, to our knowledge, novel method for suppressing the bias drift of interferometric all-fiber optic gyroscopes (I-FOGs) and for self-calibrating the bias of I-FOGs to zero. Using a square wave to reverse the polarity of the sinusoidal voltage on a piezoelectric (PZT) modulator periodically, and calculating the output signal of a demodulator circuit in-phase with the square wave by a digital signal processor (DSP), we successfully reduce the bias drift of I-FOGs. Experimental results show that, at room temperature, the proposed method dramatically reduces the bias instability of an I-FOG from 0.201   deg / h to 0.102   deg / h . With this method, the I-FOGs no longer need zero calibration.

© 2011 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.2800) Fiber optics and optical communications : Gyroscopes

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: December 20, 2010
Revised Manuscript: February 18, 2011
Manuscript Accepted: February 23, 2011
Published: March 28, 2011

Xinyue Wang, Changhong He, and Ziyu Wang, "Method for suppressing the bias drift of interferometric all-fiber optic gyroscopes," Opt. Lett. 36, 1191-1193 (2011)

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