DEVICE FOR MEASURING THE PARAMETERS OF A FIBER-OPTIC RESONATOR USING A TUNABLE SOURCE OF OPTICAL RADIATION AND COMPENSATION FOR THE NONLINEARITY OF FREQUENCY TUNING Russian patent published in 2023 - IPC G01J3/45 

FIELD: fibre optics.

SUBSTANCE: invention relates to devices for measuring and controlling the parameters of a ring resonator. The device for measuring the parameters of the fibre-optic resonator comprises a narrow-band frequency-tuneable laser that transmits radiation to the fibre-optic resonator and generates an amplitude-time signal on the photodetector that carries information about the parameters of the resonator. At the same time, it comprises a fibre divider for dividing the input radiation from the laser into a measured fibre-optic resonator and an auxiliary asymmetric Mach-Zehnder interferometer, which compensates for the nonlinearity of laser radiation frequency tuning, photodetectors for obtaining output radiation after the resonator and the auxiliary interferometer, converting the optical signal into an electrical one, transmitted to an oscilloscope connected to a PC with a mathematical processing function that supplements the signal from the auxiliary interferometer with an imaginary part using the Hilbert transform, which calculates the phase of the interferometer signal, converting it into a frequency-time dependence of the laser radiation.

EFFECT: measuring the operating parameters of a fibre-optic ring resonator.

1 cl, 5 dwg