解调
光学
相对强度噪声
强度调制
宽带
调制(音乐)
陀螺仪
连贯性(哲学赌博策略)
灵敏度(控制系统)
噪音(视频)
萨格纳克效应
频率调制
物理
相位噪声
光纤
相位调制
计算机科学
电信
声学
电子工程
激光器
带宽(计算)
半导体激光器理论
频道(广播)
工程类
人工智能
量子力学
图像(数学)
作者
Shuang Liu,Lu Liu,Junyi Hu,Qingwen Liu,Huilian Ma,Zuyuan He
出处
期刊:Optics Letters
[The Optical Society]
日期:2022-09-27
卷期号:47 (19): 5100-5100
被引量:6
摘要
A broadband source-driven resonant fiber-optic gyroscope (RFOG) can reduce coherence-related noise, thus achieving a better sensitivity with a much simpler configuration than the traditional system with a coherent source. Its detection sensitivity, however, is still limited by the excess relative intensity noise (RIN) of the broadband source. In this paper, the RIN error mechanism in this broadband source-driven RFOG is revealed and countermeasures are presented. We demonstrate that the use of a high-finesse fiber-optic ring resonator and a high-frequency modulation-demodulation technique can reduce the RIN-induced error. It is indicated that the optimal modulation parameters can provide a RIN-induced error reduction of 6.1 dB, allowing the broadband source-driven RFOG to operate near the shot-noise-limited theoretical sensitivity. With the optimal high-frequency modulation-demodulation technique, an angle random walk of 0.0013°/√h is achieved with a 200-m-long fiber-optic ring resonator of 7.6 cm diameter. This is the best result reported to date, to the best of our knowledge, for fiber-optic gyroscopes of this size.
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