Patent ID: 11874169
Assignee: HEFEI INSTITUTES OF PHYSICAL SCIENCE, CHINESE ACADEMY OF SCIENCES
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. A method using a device for measuring a transmittance curve of a Fabry-Perot by using a frequency comb light source, the device comprising the following components sequentially arranged in an optical path:
a single frequency pulse laser generating single frequency pulse laser;
a frequency comb laser converting received single frequency pulse laser into frequency comb laser; and
a Fabry-Perot to be detected receiving laser output from the frequency comb laser;
wherein the device further comprises a first receiving unit receiving laser from an output end of the frequency comb laser and performing component and spectrum analysis, a second receiving unit receiving laser from an output end of the Fabry-Perot to be detected and performing component and spectrum analysis, and a collimator provided with an optical aperture and arranged between the first beam splitter and the Fabry-Perot to be detected;
wherein the method comprises the following operations:
obtaining the required single frequency pulse laser and the frequency comb laser with a set type, and assembling the device;
transforming, by the frequency comb laser, the single frequency pulse laser output from the single frequency pulse laser into lasers with different frequency components, passing, by the lasers with different frequency components, through the Fabry-Perot, and measuring, by the detector and the spectrometer, transmittances corresponding to the different frequency components at one time; and
performing, by the computer, polynomial fitting on transmittances corresponding to all frequency components to obtain the transmittance curve.