摘要
Frequency combs[1, 2] consisting of equally-spaced frequencylines can be fully described by two frequencies, i.e., carrieroffset (fCEO) and repetition rate (frep). Once the two frequenciesare stabilized, the frequency comb is well defined. Frequencycombs can be used for various applications, i.e., metrology,spectroscopy, timing, communications, absolute distancemeasurements, and so on, due to their two importantcharacteristics, i.e., stabilized frequency lines and ultra-shortoptical pulses (if the mode-locking is obtained) as shown inFig. 1.
基金
supported by the "Hundred-Talent" Program of Chinese Academy of Sciences
the National Natural Science Foundation of China(61875220,61575214,61404150,61405233,and 61704181)
the National Key R&D Program of China(2017YFF0106302 and 2017YFA0701005)
Shanghai Municipal Commission of Science and Technology(17YF1430000)
