研究了一种基于强度自相关函数的光纤激光器自混合散斑速度测量方法。基于环形激光器光反馈理论，对自混合散斑信号进行自相关分析，推导出自混合散斑信号的自相关频率与表面粗糙物体运动速度之间的关系式。利用构建的环形掺铒光纤（EDF）激光器自混合散斑测速实验系统，对不同速度下的运动物体进行了实验测试，验证了自相关频率与物体运动速度之间的线性关系。研究结果表明该方法可以用于物体运动速度的测量。

Autocorrelation-based velocity measurement is studied with self-mixing speckle in an erbium-doped ring laser. The autocorrelation function of self-mixing speckle is deduced using the optical feedback theory of fiber ring laser, and a relation between the autocorrelation frequency of speckle signals and the velocities of moving object is theoretically obtained. Utilizing the experimental system based on an erbium-doped fiber(EDF) ring laser, the velocity measurement is carried out toward a dynamic target with different velocities. Linear relationship between autocorrelation frequency and the velocity of the target is proved. The result indicates that the autocorrelation of self-mixing speckle in a fiber ring laser can be applied to velocity measurement.