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无源谐振式激光陀螺的噪声分析

Noise Analysis of a Passive Resonant Laser Gyroscope.

作者信息

Liu Kui, Zhang Fenglei, Li Zongyang, Feng Xiaohua, Li Ke, Du Yuanbo, Schreiber Karl Ulrich, Lu Zehuang, Zhang Jie

机构信息

MOE Key Laboratory of Fundamental Physical Quantities Measurements & Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China.

Technical University of Munich, Forschungseinrichtung Satellitengeodäsie, Geodetic Observatory Wettzell, 93444 Bad Kötzting, Germany.

出版信息

Sensors (Basel). 2020 Sep 19;20(18):5369. doi: 10.3390/s20185369.

DOI:10.3390/s20185369
PMID:32961725
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7570482/
Abstract

Large-scale laser gyroscopes have found important applications in Earth sciences due to their self-sufficient property of measurement of the Earth's rotation without any external references. In order to extend the relative rotation measurement accuracy to a better level so that it can be used for the determination of the Earth orientation parameters (EOP), we investigate the limitations in a passive resonant laser gyroscope (PRG) developed at Huazhong University of Science and Technology (HUST) to pave the way for future development. We identify the noise sources from the derived noise transfer function of the PRG. In the frequency range below 10-2Hz, the contribution of free-spectral-range (FSR) variation is the dominant limitation, which comes from the drift of the ring cavity length. In the 10-2 to 103Hz frequency range, the limitation is due to the noises of the frequency discrimination system, which mainly comes from the residual amplitude modulation (RAM) in the frequency range below 2 Hz. In addition, the noise contributed by the Mach-Zehnder-type beam combiner is also noticeable in the 0.01 to 2 Hz frequency range. Finally, possible schemes for future improvement are also discussed.

摘要

大型激光陀螺仪因其无需任何外部参考就能自主测量地球自转的特性，在地球科学领域有着重要应用。为了将相对旋转测量精度提升至更高水平，以便用于确定地球定向参数（EOP），我们研究了华中科技大学（HUST）研制的无源谐振激光陀螺仪（PRG）的局限性，为其未来发展铺平道路。我们从PRG的噪声传递函数中识别出噪声源。在低于10^-2Hz的频率范围内，自由谱范围（FSR）变化的影响是主要限制因素，这源于环形腔长度的漂移。在10^-2至10^3Hz频率范围内，限制因素是鉴频系统的噪声，其主要来自低于2Hz频率范围内的残余幅度调制（RAM）。此外，马赫曾德尔型光束合束器产生的噪声在0.01至2Hz频率范围内也较为显著。最后，还讨论了未来可能的改进方案。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8027/7570482/71e679d9bf0a/sensors-20-05369-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8027/7570482/57e6d55df868/sensors-20-05369-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8027/7570482/611467f262e5/sensors-20-05369-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8027/7570482/1b215492d7c7/sensors-20-05369-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8027/7570482/80fe55d28201/sensors-20-05369-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8027/7570482/21f7748bbca3/sensors-20-05369-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8027/7570482/e66962fb5e8b/sensors-20-05369-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8027/7570482/71e679d9bf0a/sensors-20-05369-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8027/7570482/57e6d55df868/sensors-20-05369-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8027/7570482/611467f262e5/sensors-20-05369-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8027/7570482/1b215492d7c7/sensors-20-05369-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8027/7570482/80fe55d28201/sensors-20-05369-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8027/7570482/21f7748bbca3/sensors-20-05369-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8027/7570482/e66962fb5e8b/sensors-20-05369-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8027/7570482/71e679d9bf0a/sensors-20-05369-g007.jpg

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Phys Rev Lett. 2020 Jul 17;125(3):033605. doi: 10.1103/PhysRevLett.125.033605.
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Long-term digital frequency-stabilized laser source for large-scale passive laser gyroscopes.用于大型无源激光陀螺仪的长期数字频率稳定激光源。
Rev Sci Instrum. 2020 Jan 1;91(1):013001. doi: 10.1063/1.5134928.
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Thermal phase noise in giant interferometric fiber optic gyroscopes.
大型干涉式光纤陀螺仪中的热相位噪声。
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