Microwave instantaneous frequency measurement device based on optical frequency comb

Abstract

The disclosure provides a microwave instantaneous frequency measurement device based on an optical frequency comb, including: an optical comb generation module, a signal modulation and optical comb phase shifting module, and a dispersion and wavelength division module; the optical comb generation module includes: an optical comb generator for Generate an optical frequency comb; the signal modulation and optical comb phase shifting module is connected to the optical comb generation module; used to modulate the signal to be measured to each comb tooth of the input optical frequency comb of the optical comb generation module, And introduce different phase shifts to each comb tooth of the optical frequency comb; the dispersion and wavelength division module is connected with the signal modulation and the optical comb phase shifting module; for the output of the signal modulation and the optical comb phase shifting module The optical frequency comb modulated by the signal to be tested introduces a phase shift as a whole, separates the optical frequency combs with different frequency components at a wavelength interval, and respectively measures the frequency values ​​of the signal to be tested. The disclosed working bandwidth is effectively expanded, the response speed is fast, and the measurement precision is high.

Description

technical field [0001] The present disclosure relates to the field of microwave photonics, in particular to a microwave instantaneous frequency measuring device based on an optical frequency comb. Background technique [0002] The future electronic warfare environment is populated by microwave signals that vary over a wide frequency spectrum and are short in duration. Intercepting these signals and quickly identifying their frequency, amplitude and other parameters are of great significance to the subsequent analysis of the information carried in the signals. Therefore, the rapid measurement of microwave signal frequency has an extremely important position in future electronic warfare. The traditional electrical scheme mainly adopts the superheterodyne instantaneous frequency measurement method for frequency measurement, and the typical method is the search superheterodyne method. It is composed of antenna, low-noise amplifier, band-pass filter, mixer, tuning control circu...

AI Technical Summary

Problems solved by technology

There are also some instantaneous frequency measurement schemes based on microwave photons, but the accuracy of these schemes often decreases when the frequency measurement range is large, and cannot be adapted to scenarios that require high precision.

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