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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 33 — Nov. 20, 2013
  • pp: 8024–8031

Low-delay, high-bandwidth frequency-locking loop of resonator integrated optic gyro with triangular phase modulation

Yinzhou Zhi, Lishuang Feng, Ming Lei, and Kunbo Wang  »View Author Affiliations


Applied Optics, Vol. 52, Issue 33, pp. 8024-8031 (2013)
http://dx.doi.org/10.1364/AO.52.008024


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Abstract

A frequency-locking loop affects the bandwidth and output of the resonator integrated optic gyro (RIOG). A low-delay, high-bandwidth frequency-locking loop is implemented on a single field-programmable gate array with triangular phase modulation. The signal processing delay is reduced to less than 1 μs. The loop model is set up, and the influences of loop parameters on the bandwidth and unit step response are analyzed; the bandwidth of 10 kHz is obtained with the optimized loop parameters. As a result, the accuracy of the frequency-locking loop is reduced to 1.37 Hz (10 s integrated time). It is equivalent to a rotation rate of 0.005deg/s, which is close to the ultimate sensitivity of the RIOG. Moreover, the bias stability of the RIOG is improved to 0.45deg/s (10 s integrated time) based on the frequency-locking loop.

© 2013 Optical Society of America

OCIS Codes
(130.6010) Integrated optics : Sensors
(140.3370) Lasers and laser optics : Laser gyroscopes
(140.3410) Lasers and laser optics : Laser resonators

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: August 8, 2013
Revised Manuscript: October 14, 2013
Manuscript Accepted: October 14, 2013
Published: November 14, 2013

Citation
Yinzhou Zhi, Lishuang Feng, Ming Lei, and Kunbo Wang, "Low-delay, high-bandwidth frequency-locking loop of resonator integrated optic gyro with triangular phase modulation," Appl. Opt. 52, 8024-8031 (2013)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-52-33-8024


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