HOLOGRAPHIC METHOD FOR GENERATING RADIO FREQUENCY ELECTRICAL OSCILLATIONS AT DISCRETE FREQUENCIES Russian patent published in 2024 - IPC H03B17/00 H03B28/00 G01S13/00 G01C3/08 G02F1/39 G03H1/00 G03H1/16 G02F2/00 

FIELD: telecommunications; radio electronics.

SUBSTANCE: used in equipment for these fields of application. In the claimed holographic method for generating radio frequency electrical oscillations at discrete frequencies, a laser light flux with a spherical wavefront is formed. A holographic interferometer with a reflective-transmitting Fourier hologram is used. The generated laser light flux with a spherical wavefront is directed into the plane of the reflective-transmitting Fourier hologram of the holographic interferometer, where it partially diffracts from the reflective-transmitting Fourier hologram, and partially passes through it, is reflected by the flat mirror of the holographic interferometer and partially re-passes in the opposite direction through the Fourier hologram. In the plane of the photodetector, laser light fluxes are combined and form a ring-shaped interferogram. The method uses a flat mirror mounted on the side face of a piezomaterial structure, the electrodes of which are supplied with amplitude-stabilized alternating electrical voltage. In this case, the side face of the structure made of piezomaterial with a flat mirror of a holographic interferometer with a reflective-transmitting Fourier hologram mounted on it is moved with the oscillation frequency of an amplitude-stabilized alternating electrical voltage. Vibrations of a flat mirror of a holographic interferometer cause oscillations of the optical field intensity level in the interference fringes of the interferogram formed by the holographic interferometer, varying in discrete frequencies. As a photodetector, a device consisting of individual photodetectors, which are placed in interference fringes of various orders of the generated interferogram, and with the help of which fluctuations in the intensity levels of the optical field in the interference fringes of the interferogram are converted into radio frequency electrical oscillations at discrete frequencies. To change the values of a set of discrete frequencies of radio frequency electrical oscillations at the outputs of individual photodetectors of the photodetector device, the level or frequency of oscillations of the amplitude-stabilized alternating electrical voltage supplied to the electrodes of the piezomaterial structure is changed.

EFFECT: possibility of a structurally simpler technical implementation of the proposed holographic method for generating radio frequency electrical oscillations at discrete frequencies.

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