飞秒激光频率梳精密测距技术综述

High-precision distance measurement using femtosecond laser frequency comb

高精度绝对距离测量在科技发展中具有重要的作用,传统的测量方法已无法满足日益提高的测量要求。光学频率梳是重频和相位完全锁定的锁模脉冲激光,具有很高的空间、时间和频率分辨率。基于光频梳的测距技术由于在大尺寸计量及未来空间任务中的应用潜力引起了极大关注。介绍了光频梳测距技术的发展与现状,重点介绍了5种测量原理,包括合成波长干涉法、多波长干涉法、色散干涉法、双光梳干涉法和飞行时间法。

High-precision absolute distance measurement plays an important role in the development of sciences and technology. The traditional methods are gradually unable to meet the increasing requirements. Optical frequency comb is mode locked pulse laser with repetition rate and phase controlled, which has higher temporal, spatial, and frequency resolution. Thus, comb-based distance measurement has attracted lots of attention due to its application in high accuracy large scale metrology and satellite flying formation. In this paper, the development and status of comb-based distance measurement is summarized, and five measurement principles are introduced in detail, including synthetic wavelength interferometry, multi-wavelength interferometry, dispersive interferometry, dualcomb interferometry, and time-of-flight method.