中文摘要：

在环形激光器的理论基础上,结合环形掺铒光纤激光器自混合散斑速度传感实验系统,数值模拟了激光器自混合散斑信号的功率输出。分析了自混合散斑信号的平均散斑频率,频谱能量密度性能。研究结果表明,频谱平均频率与物体速度成近似的线性关系,频谱能量密度与探测距离成近似线性关系。

英文摘要：

Based on the theory of the fiber ring laser, self - mixing speckle generated in an erbium - doped fiber laser is theoretically studied and numerically simulated. The self - mixing speckle signals produced by simulation representing different velocities are analyzed by fast Fourier transform （FFT）, and the result shows that the mean speckle frequency and spectrum energy density of the self - mixing signal are respectively linear related with the velocity and the detecting distance of the dynamic object. The results indicate that self - mixing speckle in an erbium - doped optical fiber laser can be used to the measurement of a dynamic object.