论文部分内容阅读
研究了不等臂M-Z干涉仪鉴频的基本原理,对采用三角波调制改变干涉仪臂长获得鉴频信号的过程进行了定量分析.在此基础上,仿真计算了线性改变干涉仪臂长和频率漂移对鉴频信号输出的影响,采用LiNbO3相位调制器取代PZT(Piezo-Electric Transducer)调制方式,设计实现了鉴频实验装置,获得的实验结果与理论和仿真结果吻合.对驱动信号和环境扰动对该方案的影响进行了实验验证和理论分析,与PZT调制方式相比,无需高精度温控装置,系统工作稳定可靠,信号调制动态范围可以从PZT调制方式下的几十Hz扩大到GHz.同时可以在该方案中采用lock-in确定相位-频率响应度,从而测定激光器的频率波动范围.
The basic principle of unequal arm MZ interferometer frequency discrimination is studied and the process of using triangle wave modulation to change the arm length of the interferometer to obtain the frequency discriminating signal is quantitatively analyzed.On this basis, Drift on the frequency of the signal output, the use of LiNbO3 phase modulator instead of PZT (Piezo-Electric Transducer) modulation mode, designed and implemented frequency discriminating experimental device, the experimental results obtained and theoretical and simulation results agree well with the driving signal and environmental disturbances Compared with PZT modulation method, the system does not need high precision temperature control device, the system work is stable and reliable, and the dynamic range of signal modulation can be expanded from tens of Hz in PZT modulation mode to GHz. In the meantime, lock-in can be used in this solution to determine the phase-frequency response to determine the frequency range of the laser.