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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 20 — Jul. 10, 2011
  • pp: 3455–3460

Instantaneous phase method for readout signal processing of body dithered ring laser gyro

Zhenfang Fan, Hui Luo, and Shaomin Hu  »View Author Affiliations

Applied Optics, Vol. 50, Issue 20, pp. 3455-3460 (2011)

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The readout signal of a body dithered ring laser gyro contains both useful information and the dither component. The dither component must be removed to get the useful information. The dither stripping method can get the useful information without latency. But the quadrature demodulator only has 1 / 4 pulse resolution, which means that the quantization noise will limit the short-term accuracy. The effect and the property of quantization noise are analyzed in detail. Taking advantage of high-speed analog-to-digital conversion (ADC), the analog values of the two beat frequency signals in quadrature are sampled. A novel instantaneous phase method is introduced, which can get the residual phase besides 4 × resolution and the quantization noise can be removed radically. The Allan variance analysis of experimental results shows that the quantization noise coefficient using this method is only 1 / 7 of that using the original 4 × resolution method.

© 2011 Optical Society of America

OCIS Codes
(040.2840) Detectors : Heterodyne
(120.1880) Instrumentation, measurement, and metrology : Detection
(120.4640) Instrumentation, measurement, and metrology : Optical instruments
(140.3560) Lasers and laser optics : Lasers, ring

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: November 22, 2010
Revised Manuscript: May 10, 2011
Manuscript Accepted: May 17, 2011
Published: July 1, 2011

Zhenfang Fan, Hui Luo, and Shaomin Hu, "Instantaneous phase method for readout signal processing of body dithered ring laser gyro," Appl. Opt. 50, 3455-3460 (2011)

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  1. W. E. Lamb, “Theory of an optical maser,” Phys. Rev. A 134, A1429–A1450 (1964). [CrossRef]
  2. M. Faucheux, D. Fayoux, and J. J. Roland, “The ring laser gyro,” J. Opt. 19, 101–115 (1988). [CrossRef]
  3. W. W. Chow, “The ring laser gyro,” Rev. Mod. Phys. 57, 61–104 (1985). [CrossRef]
  4. F. Aronowitz, “Theory and operation of a traveling-wave laser,” Ph.D. thesis (New York University, 1969).
  5. F. Aronowitz, “Fundamentals of the ring laser gyro,” in Optical Gyros and Their Application, D.Loukianov, R.Rodloff, H.Sorg, and B.Stieler, eds. (RTO/NATO, 1999).
  6. Z. Liu, “Demodulation and implementation of dithered ring laser gyro,” Meas. Control Technol. 23, 67–75 (2004).
  7. Z. S. Huang, X. S. Wang, S. Q. Qin, C. S. Hu, and H. J. Hu, “Pulse subdivision technique for differential ring laser gyro,” Laser J. 28, 33–34 (2007).
  8. J. Van de Vegte, Fundamentals of Digital Signal Processing (Publishing House of Electronic Industry, 2009).
  9. R. G. Majure, “Demonstration of a ring laser gyro system for pointing and stabilization applications,” in Position Location and Navigation Symposium (IEEE, 1990), pp. 219–225.
  10. K. R. Fritze, J. E. Killpatrick, and D. F. Berndt, “Ring laser gyro dither stripper,” U.S. patent 5,249,031 (28 September 1993).
  11. D. A. Doheny, “Adaptive filters for correlated noise reduction in ring laser gyro inertial systems,” M.S. thesis (University of South Florida, 2004).
  12. J. E. Killpatrick, “Dither stripper to leave base motion,” U.S. patent 5,329,355 (12 July 1994).
  13. J. E. Killpatrick, D. F. Berndt, K. R. Fritze, and G. E. Cary, “Laser gyro dither stripper gain correction method and apparatus,” U.S. patent 5,486,920 (23 January 1996).
  14. D. A. Tazartes and J. G. Mark, “Apparatus for compensating for change in laser gyro dither pickoff scale factor,” U.S. patent 5,325,173 (28 June 1994).
  15. Gyro and Accelerometer Panel of IEEE, “IEEE standard specification format guide and test procedure for single axis laser gyros,” STD 647 (IEEE, 1995).
  16. D. W. Allan, “Statistics of atomic frequency standards,” Proc. IEEE 54, 221–230 (1966). [CrossRef]

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