摘要
为了进一步提高光纤陀螺的检测精度,首先在研究了新型再入式光纤陀螺(RE-FOG)的基本原理及输出信号的基础上,对无源和有源2种结构RE-FOG的检测精度进行了理论分析,并根据干涉信号的特点提出了一种新的信号检测方法.然后讨论了有源结构中自发辐射(ASE)噪声对陀螺灵敏度的影响,并通过实验发现噪声主要依赖于线圈的带宽.最后通过实验和分析得出,在相同光纤长度并考虑自发辐射噪声的前提下,与传统IFOG相比该新型RE-FOG的灵敏度可以提高2个数量级.
In order to improve the detecting sensitivity of a fiber optic gyroscope, the detecting sensitivity of passive and active structure of RE-FOG is analyzed theoretically when the principle of re-entrant optic gyroscope（RE-FOG） and the output signal are studied firstly. Besides, a new method of signal detection is proposed according to the character of interferometric signals of Re-FOG. Then the effect of ASE noise to the sensitirity of the RE-FOG is discussed exclusively, and a result that the noise depends greatly on the bandwidth of the fiber-optic coil is found by experiments. Lastly, a conclusion is drawn that the sensitivity can be improved at least by two orders of magnitude as compared to a conventional interferometric fiber optic gyroscope（IFOG） while having the same length of the fiber-optic coil and taking ASE noise into account.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2007年第2期173-177,共5页
Journal of Harbin Engineering University
基金
国防科学技术工业委员会基础研究基金资助项目(51409040103CB0106)
