基于可调谐激光器扫频干涉绝对距离测量方法研究进展

绝对距离测量的精度对于航空航天科技、精密装备加工、卫星编队、行星空间定位等领域具有重要意义。近年来，基于可调谐激光器的扫频干涉（FSI）测距技术以其突破2π模糊度、无测量死区、不接触且不依赖导轨等优点成为国际研究热点。文中在阐述FSI测距原理的基础上，简要分析了测距系统中部分器件的类型与性能，如可调谐激光器、探测器等，以及影响测距系统不确定度的因素，包括非线性扫频、多普勒频移、色散失配等方面，着重介绍了国内外对影响不确定度因素的相应补偿方法，并对补偿后的测量结果进行对比与总结。

Research progress of absolute distance measurement methods based on tunable laser frequency sweeping interference

The accuracy of absolute distance measurement is of great significance to the fields of aerospace technology, precision equipment processing, satellite formation, and planetary space positioning. The frequency sweeping interferometry (FSI) ranging technology based on tunable lasers has become an international research hotspot in recent year. It has the advantages of breaking 2π ambiguity, no dead zone of measurement, non-touch and independent of guide rail. The principle of FSI ranging, types and performance of some devices in the ranging system were briefly introduced, such as tunable lasers, detectors, etc. The factors that affect the uncertainty of the ranging system, including non-linear frequency sweep, Doppler frequency shift, dispersion mismatch, etc. were analyzed. Corresponding compensation methods for influencing uncertainty factors were discussed, and measurement results after compensation were compared and summarized.