论文部分内容阅读
调相谱检测技术是谐振式光学陀螺信号检测的重要手段。根据贝塞尔函数展开与光场叠加原理,理论分析了光纤环形谐振腔的传输特性;搭建了谐振特性测试系统,采用LiNbO3相位调制,针对不同调制频率与调制电压条件下光纤环的谐振特性和解调曲线特性开展了实验,对实验结果进行分析,得到了调制频率、调制电压与光纤环形谐振腔谐振信号及解调信号之间的关系,实验结果与理论分析相符;并对调制过程中出现的谷裂现象进行了测试与分析,通过实验数据拟合,得到了产生谷裂现象的临界调制频率与调制电压值之间的关系。
Phase spectrum detection technology is an important method of resonant optical gyro signal detection. Based on the principle of Bessel function expansion and light field superposition, the transmission characteristics of fiber ring resonator are theoretically analyzed. A resonant characteristic test system is set up. By using LiNbO3 phase modulation, the resonant characteristics of fiber ring under different modulation frequency and modulation voltage, Demodulation curve characteristics of the experiment carried out on the experimental results were analyzed, the modulation frequency, the modulation voltage and fiber ring resonator resonance signal and the relationship between the demodulation signal, the experimental results consistent with the theoretical analysis; and the modulation process appears The phenomenon of valley cracking was tested and analyzed. The relationship between the critical modulation frequency and the modulation voltage was obtained by fitting the experimental data.