可调谐激光器的调制线性度和调制范围是限制调频连续波激光测距测量分辨率的主要因素.利用单个调制范围较小的可调谐激光器对单个目标进行调频连续波激光测距时，对目标进行多次测量，再将经过等光频间隔采样的信号进行信号融合可以达到提高测量分辨率的目的.该方法可以有效降低调频连续波激光测距对激光器调制范围的要求，且容易实现、系统组成简单，有利于将调频连续波激光测距引入工业大尺寸测量、空间技术、测绘等领域.

Modulation linearity and modulation range of the tunable laser are the major factors limiting the resolution of FMCW laser ranging. When using a tunable laser with a small modulation range to measure the distance of a single target, the measuring resolution can be improved by fusing signals of multiple measurements sampled with equal optical frequency interval. This method can greatly reduce the FMCW laser range’s demands on modulation range of the tunable laser. This method is easy to achieve and the structural is simple. This system has a wide application in industrial large scale measurement, space technology, and surveying.