Radiophotonic module for Doppler frequency shift measurement of a reflected signal for radar type problems solving

Oleg G. Morozov; Alexander A. Ivanov; Airat Zh. Sakhabutdinov; Pavel E. Denisenko; Gennadiy A. Morozov; Evgeny P. Denisenko; Alexandra A. Lustina; Vladimir D. Andreev

doi:10.1117/12.2629393

25 July 2022 Radiophotonic module for Doppler frequency shift measurement of a reflected signal for radar type problems solving

Oleg G. Morozov, Alexander A. Ivanov, Airat Zh. Sakhabutdinov, Pavel E. Denisenko, Gennadiy A. Morozov, Evgeny P. Denisenko, Alexandra A. Lustina, Vladimir D. Andreev

Author Affiliations +

Proceedings Volume 12295, Optical Technologies for Telecommunications 2021; 122950A (2022) https://doi.org/10.1117/12.2629393
Event: Nineteenth International Scientific and Technical Conference "Optical Technologies for Communications", 2021, Samara, Russian Federation

Abstract

This article describes a new method for the Doppler frequency shift (DFS) measurement of a radar microwave signal reflected from a moving object, based on radio photonics technologies. The DFS measurement device has the same structure as the sequential radiophotonic link with filtration and consists of a laser, a block of electro-optical modulators, a fiber Bragg grating (FBG), and a photodetector. The block of electro-optical modulators, in contrast to the known solutions based on a two-port Mach-Zehnder amplitude modulator, is based on two subunits, consisting of connected tandem single-port amplitude and phase modulators (TAPM). The general structure of the TAPM subunits is parallelserial. The microwave signal reflected from the object arrives at the first TAPM, which forms the measurement channel. The second and third TAPMs, connected in series, form a reference channel connected in parallel to the measurement one. The second TAPM receives a reference signal from the locator transmitter at the probing microwave frequency, after which the two-frequency radiation, spaced by twice of the probing frequency, is fed to the third TAPM, which generates from each component of the two-frequency radiation two more with a difference frequency equal to twice the maximum possible DFS. The beats of signals from the measurement and reference channels at the output of the photodetector are three high-frequency (GHz) or low-frequency (MHz) electrical signals, the frequencies and powers of which used for the DFS determination.

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Oleg G. Morozov, Alexander A. Ivanov, Airat Zh. Sakhabutdinov, Pavel E. Denisenko, Gennadiy A. Morozov, Evgeny P. Denisenko, Alexandra A. Lustina, and Vladimir D. Andreev "Radiophotonic module for Doppler frequency shift measurement of a reflected signal for radar type problems solving", Proc. SPIE 12295, Optical Technologies for Telecommunications 2021, 122950A (25 July 2022); https://doi.org/10.1117/12.2629393

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KEYWORDS

Measurement devices

Radar

Modulators

Microwave radiation

Doppler effect

Electrooptic modulators

Digital signal processing

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