论文标题
使用正向传输激光干涉测量法的震中定位
Epicenter localization using forward-transmission laser interferometry
论文作者
论文摘要
广泛分布的光纤以及相位敏感的激光干涉法可以扩展地震检测方法，并具有巨大的震中定位潜力。在本文中，我们提出了一种基于正向传输方案的积分响应方法。它使用频谱分析和参数拟合来定位震中。使用给定的纤维环的给定形状，可以使用向前和反向传播的光的积分相变为确定震中的方向，深度，距离和地震波速度。对于带有SNR = 20 dB的嘈杂情况，仿真结果表明，当震中距离为200 km时：方向角度的误差为〜0.003°，p波速度的误差为〜0.9 m/s，震中深度的误差为epenenter Depth的误差为〜9.5 m，〜9.5 m，并且epenters距离的误差为epenenter距离的误差。
Widely distributed optical fibers, together with phase-sensitive laser interferometry, can expand seismic detection methods and have great potential for epicenter localization. In this paper, we propose an integral response method based on a forward transmission scheme. It uses spectrum analysis and parameter fitting to localize the epicenter. With the given shape of the fiber ring, the integral phase changes of light propagating in the forward and reverse directions can be used to determine the direction, depth, distance of the epicenter, and seismic wave speed. For the noisy case with SNR=20 dB, the simulation results show ultrahigh precision when epicenter distance is 200 km: the error of the orientation angle is ~0.003°, the error of the P-wave speed is ~0.9 m/s, the error of the epicenter depth is ~9.5 m, and the error of the epicenter distance is ~200 m.
