Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Synchronous in-phase and quadrature demodulation technique for resonant micro-optic gyroscope

Not Accessible

Your library or personal account may give you access

Abstract

The phase modulation and demodulation technique is widely used in resonant optical gyroscopes to accurately detect resonance frequencies, which directly affect gyro sensitivity. In order to overcome the influences of the system phase fluctuations, an in-phase and quadrature (IQ) demodulation technique is introduced for a resonant micro-optic gyroscope (RMOG). The phase fluctuations in the RMOG are measured, and their influence on the demodulation slope at the resonance point is compared between the traditional sinusoidal demodulation and the IQ demodulation both theoretically and experimentally. It can be concluded that the output of the proposed IQ demodulation is not affected by any phase fluctuations. The demodulation slope is always at its maximum value, thus improving the signal-to-noise ratio of the detection system. By using the IQ demodulation technique, a random walk coefficient of 0.5°/h is carried out. A long-term bias stability of 9°/h is successfully observed, which is improved by a factor of 1.6 compared with that obtained using the traditional phase-sensitive sinusoidal demodulation technique.

© 2019 Optical Society of America

Full Article  |  PDF Article
More Like This
Short fiber resonant optic gyroscope using the high-frequency Pound–Drever–Hall technique

Xiaojun Jin, Yi Lin, Ying Lu, Huilian Ma, and Zhonghe Jin
Appl. Opt. 57(20) 5789-5793 (2018)

Resonant fiber optic gyro based on a sinusoidal wave modulation and square wave demodulation technique

Linglan Wang, Yuchao Yan, Huilian Ma, and Zhonghe Jin
Appl. Opt. 55(12) 3274-3278 (2016)

Signal processing improvement of passive resonant fiber optic gyroscope using a reciprocal modulation-demodulation technique

Hanzhao Li, Yi Lin, Lu Liu, Huilian Ma, and ZHonghe Jin
Opt. Express 28(12) 18103-18111 (2020)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (12)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (9)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved