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

Chuanbin Wu, Yi Lin, Xiaojun Jin, Huilian Ma, and Zhonghe Jin
Appl. Opt. 58(18) 5050-5056 (2019)

Current modulation technique used in resonator micro-optic gyro

Ming Lei, Lishuang Feng, Yinzhou Zhi, Huilan Liu, Junjie Wang, Xiaoyuan Ren, and Ni Su
Appl. Opt. 52(2) 307-313 (2013)

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
Appl. Opt. 52(33) 8024-8031 (2013)

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 OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA 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 OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA 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 OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA 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 OSA member, or as an authorized user of your institution.

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

Metrics

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

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