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Research on key technologies of high repetition rate optical frequency comb

With the development of laser technology and astronomy, optical frequency comb (OFC), as a special kind of laser source, is widely used in the fields of laser ranging, spectroscopy and precision measurement. Especially in astrometry, the use of OFC in wavelength calibration is significance for the development of modern astronomy. However, the current calibration light source from 350nm to 400nm is not available, and the repetition frequency of direct output of the OFC is too low. This paper intends to obtain 390nm OFC by the use of frequency multiplication of 1560nm laser, and research on the methods to improve repetition frequency by Fabry-Perot filter technology. Relevant techniques and methods are improved through the research on experiments.