Reliable non-ambiguity range extension with dual-comb simultaneous operation in absolute distance measurements

摘要: We report an absolute distance measurement scheme using two simultaneous optical frequency combs with different repetition rates for reliable non-ambiguity range extension. Since the extension is susceptible to drift during rate adjustment, pulse trains are coupled and directed simultaneously onto a target coincident measurement. The avoids process of adjusting suppresses influence therein. distances measured by distinguished type II second harmonic generation. Target movement atmospheric variation made imitate drift, experimental results show that remains effective along