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Journal of the Optical Society of Korea

Journal of the Optical Society of Korea

| PUBLISHED BY THE OPTICAL SOCIETY OF KOREA

  • Vol. 3, Iss. 2 — Sep. 30, 1999
  • pp: 80–85

Suppression of Output Distortion in a Gyroscope using Fiber Amplifier/Source by Tracking of Optimum Modulation Amplitude

Hee-Gap Park  »View Author Affiliations


Journal of the Optical Society of Korea, Vol. 3, Issue 2, pp. 80-85 (1999)


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Abstract

We propose and demonstrate a new scheme for suppression of output distortion in an open-loop gyroscope employing an erbium-doped fiber amplifier/source (FAS). In addition to the main modulation for the rotation rate measurement, a small auxiliary modulation at a different frequency is used to extract an error signal, which is necessary for keeping the quasi-dc component of the feedback signal power at a constant level for varying rotation rate. By active tracking of the optimum modulation condition using this two-frequency modulation scheme, we obtain stable gyro output with suppressed distortion as well as stable FAS characteristics. We also calculate the distortion in the gyro response due to the feedback effect, from which we estimate the FAS gyro output distortion due to the residual ac feedback effect when the dc feedback effect is removed by the proposed scheme. The measured residual deviation agrees reasonably with the estimation.

© 1999 Optical Society of Korea

History
Original Manuscript: July 29, 1999
Published: September 1, 1999

Citation
Hee-Gap Park, "Suppression of Output Distortion in a Gyroscope using Fiber Amplifier/Source by Tracking of Optimum Modulation Amplitude," J. Opt. Soc. Korea 3, 80-85 (1999)
http://www.opticsinfobase.org/josk/abstract.cfm?URI=josk-3-2-80


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