METHOD FOR MEASURING THE EMISSION SPECTRUM Russian patent published in 2021 - IPC G01J3/26 

FIELD: laser technology.

SUBSTANCE: invention relates to the field of laser technology and relates to a method for measuring the radiation spectrum. The method consists in the fact that in order to measure complex emission spectra of a semiconductor laser with microwave modulation of the injection current, radiation is fed through an optical isolator to a Fabry-Perot interferometer, the base length of which is scanned with a sawtooth voltage from a generator, the signal from which is fed to a piezoceramic transducer. The radiation is fed to a photodetector, the signal from which is fed to a digital oscilloscope and a complex spectrum is recorded, which must be processed. When processing the spectra, a previously obtained experimentally obtained form of transmission of the Fabry-Perot interferometer is used, the amplitude and position of which are then selected by the method for least squares for the processed spectra. For each of the observed peaks in the processed spectrum, their values of the amplitude and position of the maximum of the experimentally recorded transmission form are selected.

EFFECT: improving the measurement accuracy of spectral components of radiation for a Fabry-Perot interferometer with a high resolution.

1 cl, 4 dwg