Apparatus and method for realizing instantaneous microwave frequency measurement by dual polarization modulators

Abstract

The invention discloses an apparatus and method for realizing instantaneous microwave frequency measurement by dual polarization modulators. The invention relates to the technical fields of microwave and optical communication, and is mainly used for the measurement of microwave signal frequency. The method, as shown in the drawing, includes a light source, a signal source, the dual polarization modulators, a single-mode fiber, a coupler, a polarization controller, a polarizer, and a photoelectric detector, and the microwave signals of the unknown frequency generated by the signal source are modulated by the dual polarization modulators to obtain polarization multiplexing signals. Through the fiber dispersion, the polarization multiplexing signals are divided into two paths, one is maintained at the same polarization state, the other one is converted into a linear polarization signal through the polarization controller and the polarizer. The photoelectric detector detects the two signals, measures the power values and establishes the power comparison functions. According to the correspondence relation, the measured frequency can be estimated. By changing the polarization state of one signal, the measurement scope can be adjusted, the realization is simple, the resolution is high, and the measurement error is less.

Description

technical field [0001] The present invention relates to the field of optical communication technology and microwave technology, and mainly relates to a method for realizing instantaneous microwave frequency measurement based on a dual polarization modulator (DPol-MZM) in optical communication technology Background technique [0002] In electronic warfare and radar systems, it is very important to extract various characteristic parameters such as frequency and amplitude from the microwave signal intercepted by the receiver in time. However, with the millimeter-wave band (0.4-40GHz) signals being put into use, traditional electronic receivers are limited by bandwidth, and their complex structure, bulky size, and vulnerability to electromagnetic interference and other bottleneck problems urgently need to provide a new solution . [0003] Microwave photonic technology combines the advantages of photonic technology and microwave technology, can make up for the shortcomings of el...

AI Technical Summary

Problems solved by technology

However, with the millimeter-wave (0.4-40GHz) signal being put into use, the traditional electronic receiver is limited by bandwidth, and its structure is complex, bulky, vulnerable to electromagnetic interference and other bottleneck problems, and it is urgent to provide a new solution

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