Generation of five phase-locked harmonics by implementing a divide-by-three optical frequency divider

摘要

We report the generation of five phase-locked harmonics, f_1: 2403 nm, f_2:1201 nm, f_3: 801 nm, f_4: 600 nm, and f_5: 480 nm with an exact frequencyratio of 1 : 2 : 3 : 4 : 5 by implementing a divide-by-three optical-frequencydivider in the high harmonic generation process. All five harmonics aregenerated coaxially with high phase coherence in time and space, which areapplicable for various practical uses.