Optoelectronic-oscillator-based X-band high-speed swept signal generation device and method

Abstract

The invention discloses an optoelectronic-oscillator-based X-band high-speed swept signal generation device and an optoelectronic-oscillator-based X-band high-speed swept signal generation method. The device comprises a swept laser, a phase modulator, an erbium-doped optical fiber amplifier, a variable optical attenuator, a dispersion compensation module, a circulator, an optical fiber, a polarization controller, an optoelectronic detector, a microwave signal amplifier and an oscilloscope or a frequency spectrograph. According to the device and the method, the optoelectronic-oscillator-based X-band high-speed swept signal generation method is proposed for changing structural design that a microwave swept signal is generated by virtue of the development and innovation of a novel optoelectronic technology, particularly microwave photonics, and the swept laser is used for tuning a loop parameter to obtain an X-band microwave swept signal with continuously adjustable oscillation frequency; meanwhile, the dispersion compensation module is used for realizing a corresponding optical fiber delay line function in a conventional optoelectronic oscillator, so that the short frequency switching time interval of the generated microwave swept signal is ensured, and a foundation for the application of the device and the method to microwave swept signal generation is laid by high scanning speed.

Description

technical field [0001] The invention relates to a method and device for generating a microwave frequency sweep signal, in particular to a device and method for generating an X-band high-speed microwave frequency sweep signal based on a photoelectric oscillator. Background technique [0002] With the development of electronic science and technology, people pay more and more attention to frequency sweep measurement technology, especially the X-band linear frequency sweep source for radio communication, radio and television, radar navigation, satellite ground station and other equipment testing, as well as the analysis and analysis of related circuits. Research provides great convenience. The traditional digital sweeping source is mainly realized based on frequency synthesis technology. The development of frequency synthesis technology has gone through three stages: direct frequency synthesis technology, phase-locked frequency synthesis technology, and direct digital frequency...

AI Technical Summary

Problems solved by technology

In addition, although it has been reported in relevant literature that photoelectric oscillators can be applied to the generation of microwave signals of different frequencies, in practical applications, since the length of the fiber delay line is often greater than 1Km, if it is used to generate microwave frequency sweep signals, it will inevitably lead to The frequency switching time interval for generating microwave frequency sweep signals is greater than 50ms, so the low frequency sweep rate restricts the application of optoelectronic oscillators in the generation of microwave frequency sweep signals

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