LASER FREQUENCY MEASURING METHOD AND DEVICE USING OPTICAL FREQUENCY COMB

摘要

PROBLEM TO BE SOLVED: To measure the frequency of a laser having a large frequency variation and a low stability.SOLUTION: In laser frequency measurement using an optical frequency comb 100, the optical frequency comb 100 as the reference of measurement is made to interfere with a laser 150 as a measuring object, the frequency of a beat signal generated by the interference is measured, and the frequency of the laser 150 is measured. At least one of a repetition frequency fand a CEO frequency fof the optical frequency comb 100 is changed so that the frequency of the beat signal becomes a predetermined value, the frequency of the beat signal is measured, and the oscillatory frequency of the laser 150 is measured.SELECTED DRAWING: Figure 3