【摘要】 为抑制反射式谐振腔背景光，提出了一种基于反射式光纤环形谐振腔的宽谱光源驱动的谐振式光纤陀螺方案。首先介绍了所提方案的工作原理，分析了不同调制参数对解调曲线斜率的影响，为选取调制参数提升检测系统信噪比提供了理论支撑；其次，通过数值仿真研究了不同调制参数下散粒噪声以及相对强度噪声对陀螺角度随机游走的影响，并和传统方案做了比较；最后，搭建了实验系统对所提方案进行验证，实验采用直径为10 cm、长度约为100 m的光纤环形谐振腔作为敏感单元，测试结果表明陀螺的角度随机游走达到0.0019 (°)/■，零偏不稳定性为0.009(°)/h。所提方案在降低敏感单元损耗的同时，利用光学相消方法实现了背景光的抑制。此外，陀螺工作在探测光功率较低的点，可以有效降低噪声的影响。更多还原

【Abstract】 To suppresses the background light of the reflection-type resonator,a broadband source-driven resonant fiber-optic gyroscope scheme based on a reflection-type fiber-optic ring resonator is proposed.Firstly,the working principle of the scheme is introduced,and the influence of different modulation parameters on the slope of the demodulation curve is analyzed,providing theoretical support for selecting modulation parameters to improve the signal-to-noise ratio of the detection system.Secondly,the impact of shot noise and relative intensity noise on the angular random walk under different modulation parameters is studied through numerical simulation,and a comparison is made with traditional schemes.Finally,an experimental system is set up to validate the proposed scheme,using a fiber ring resonator with a diameter of 10 cm and a length of approximately 100 m as the sensing unit.Test results show that the gyroscope achieves an angular random walk of 0.0019 (°)/■ and a bias instability of 0.009(°)/h.The proposed scheme not only reduces the loss of the sensing unit but also suppresses the background light through an optical cancellation method.Moreover,by operating the gyroscope at a lower detected optical power,the impact of noise can be effectively minimized.更多还原