Resonant fiber optic gyroscope based on the reciprocal modulation-demodulation technique

被引：0
|
作者：
Liu L. [1 ]
Liu S. [1 ]
Qian W. [1 ]
Li H. [1 ]
Ma H. [1 ]
Jin Z. [1 ]
机构：
[1] School of Aeronautics and Astronautics, Zhejiang University, Hangzhou
来源：
Zhongguo Guanxing Jishu Xuebao/Journal of Chinese Inertial Technology | 2021年 / 29卷 / 04期
关键词：
Reciprocal modulation-demodulation technique; Resonant fiber optic gyroscope; RFOG prototype;
D O I：
10.13695/j.cnki.12-1222/o3.2021.04.017
中图分类号：
学科分类号：
摘要：
The resonant fiber optic gyroscope (RFOG) based on the Sagnac effect is a kind of rotation velocity sensors which has various advantages, such as the high sensing accuracy, compactness, beneficial for miniaturization and so on. In order to improve the gyro sensitivity by suppressing the optical noises in the RFOG system, while further reducing the system complexity for easy integration, a RFOG scheme based on a reciprocal modulation-demodulation technique is proposed, which greatly improves the reciprocity of clockwise and counterclockwise optical paths, and the influence of the laser frequency noise and the residual amplitude modulation of the phase modulators are well suppressed. A second closed loop is added on the basis of the previous experiment. An integrated RFOG prototype with a 23-m long fiber ring resonator is fully developed. The experimental results at room temperature show that the proposed RFOG prototype has almost the same zero bias instability as that of the RFOG prototype based on the multi-frequency laser source scheme with 100 m long resonator developed by Honeywell, but has obvious advantages in gyroscopic angle random walk. © 2021, Editorial Department of Journal of Chinese Inertial Technology. All right reserved.
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页码：532 / 535and540
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