COMPACT DEVICE BASED ON SOURCE OF DOUBLE COMBS USING OPTICAL MICRO-RESONATORS AND METHOD OF HETERODINE DETECTION IN METROLOGICAL APPLICATIONS Russian patent published in 2019 - IPC G02F1/39 G01J3/45 

FIELD: metrology.

SUBSTANCE: invention relates to optical metrology and relates to a method for heterodyne detection using the generation of a double optical comb based on optical micro-resonators. Method includes the generation of two optical frequency combs. First and second combs have a variety of modes, separated by a first value and second frequency value, respectively. Generation includes the input of radiation from at least one compact laser with continuous radiation, having spectral components, corresponding to the resonant frequencies of the modes responsible for the generation of optical frequency combs in at least one microcavity made of a material having an intensity-dependent refractive index. At the same time, the frequencies of at least one compact laser are synchronized with the resonant frequencies of the modes of at least one microcavity in such a manner, to exceed the threshold pumping level and provide parametrically generated first and second optical frequency combs.

EFFECT: technical result consists in increasing the compactness, stability and reliability of the source of a double optical comb.

20 cl, 9 dwg