Abstract

New developments are made in the resonant fiber optic gyro (RFOG), which is an optical sensor for the measurement of rotation rate. The digital signal processing system based on the phase modulation technique is capable of detecting the weak frequency difference induced by the Sagnac effect and suppressing the reciprocal noise in the circuit, which determines the detection sensitivity of the RFOG. A new technique based on the sinusoidal wave modulation and square wave demodulation is implemented, and the demodulation curve of the system is simulated and measured. Compared with the past technique using sinusoidal modulation and demodulation, it increases the slope of the demodulation curve by a factor of 1.56, improves the spectrum efficiency of the modulated signal, and reduces the occupancy of the field-programmable gate array resource. On the basis of this new phase modulation technique, the loop is successfully locked and achieves a short-term bias stability of 1.08°/h, which is improved by a factor of 1.47.

© 2016 Optical Society of America

Full Article  |  PDF Article
More Like This
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)

Frequency tracking out-of-lock control in a resonator fiber-optic gyro

Ming Lei, Huaiyong Yu, Yuan Fang, Zhe Feng, Yanji Wu, and Lizhe Zhang
Appl. Opt. 59(4) 923-928 (2020)

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)

References

You do not have subscription access to this journal. Citation lists with outbound citation 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

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 (8)

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

Metrics