论文部分内容阅读
给出了平衡式光学互相关方案的理论数学计算和各相关参数对测量性能的影响。研究了该测量方案的工作原理,并给出相应的数学计算,分析了脉冲宽度,倍频晶体长度以及两垂直脉冲光在晶体中的群速度对测量动态范围和灵敏度的影响。在理论分析的基础上,搭建了个平衡式互相关器的实验平台,测量光脉冲经过100m光纤链路传输后产生的时间抖动。实验结果表明,定标曲线与理论计算吻合,在有光纤振动的情况下,1～100Hz频率范围内的传输抖动均方根值约为20fs。
The theoretical mathematical calculation of the balanced optical cross-correlation scheme and the influence of the relevant parameters on the measurement performance are given. The working principle of this measurement scheme is studied and the corresponding mathematical calculations are given. The influence of the pulse width, the frequency of doubled frequency crystal and the group velocity of two vertical pulsed lights in the crystal on the dynamic range and the sensitivity of the measurement are analyzed. Based on the theoretical analysis, a balanced cross-correlator experimental platform was set up to measure the time jitter after the optical pulse was transmitted through the 100m optical fiber link. The experimental results show that the calibration curve is in good agreement with the theoretical calculation. Under the condition of optical fiber vibration, the rms value of transmission jitter in the frequency range of 1 ~ 100Hz is about 20fs.