RADIOPHOTON SCALAR AND VECTOR SYSTEMS INSTANTANEOUS FREQUENCY MEASUREMENTS MICROWAVE SIGNALS BASED SINGLE-PORT MAX-ZENDER MODULATOR AND TRIANGULAR FIBER BRAGG GRATINGS

Abstract

The goal of the work is to design an instantaneous frequency measurement system (IMF), implementing the frequency-amplitude measurement conversion, for defense applications and telecommunication networks of the 5G generation and higher with a minimized structure and simple control, which will allow achieving results the best or similar ones obtained in similar systems using complex two-port, dual, polarization Mach-Zehnder modulators (MZM), and other more complex modulators. These modulators have become unavailable due to sanctions pressure or high prices from suppliers. The SIMCs developed in this article contain in a minimal structure a single-frequency laser, a single-port MMC and a photodetector, and ensuring the operation of the system for the first time, in our opinion, is based on the spectral or polarization conversion of amplitude-modulated radiation with components of the measured frequency in scalar and vector Bragg frequency discriminator. Estimates and control experiments show the possibility of achieving a measurement error of 0.01 GHz in the minimized structure of the developed SIMCs, which is an order of magnitude better than most known SIMCs of a significantly more complex configuration with the exception of cross-distortions in the channels during their polarization separation.