Method and device for generating high-stability microwave millimeter wave source

Abstract

The invention provides a method and a device for generating a high-stability microwave millimeter wave source and relates to the technical field of photoelectron and microwave millimeter wave. The method is mainly based on the conception as follows: adopting a fiber bragg grating to perform spectrum cutting on a broadband spectrum source signal, thereby acquiring homologous dual-wavelength laser; adopting a photoelectric hybrid loop is respectively used for performing frequency spectrum expansion on two laser signals, thereby realizing dispersing equidistant spectrum cluster taking an optical carrier wave as a center; lastly, selecting a target dispersing equidistant spectrum cluster for performing square-law detection, performing narrow-band filtering after the beat frequency treatment, thereby realizing the output of a low-phase noise microwave millimeter single-frequency point signal. The microwave millimeter wave source generated by the method and the device has the advantages of (1) low phase noise and (2) full-band adjustability.

Description

technical field [0001] The invention relates to the field of optoelectronics and microwave and millimeter wave technologies, in particular to a method and device for generating a high-stability microwave and millimeter wave source. Background technique [0002] High stability microwave and millimeter wave signal source is the core device of electronic communication system. High-quality microwave and millimeter-wave signal sources play an important role in optical communication, satellite communication, microwave communication, and high-precision measurement. For single-frequency point signal sources, phase noise (phase noise) is commonly used to measure the short-term stability of microwave and millimeter wave signal sources. [0003] Traditional microwave and millimeter wave source generation technologies include crystal oscillator frequency doubling, optical beat frequency and photoelectric oscillation. Crystal oscillator frequency doubling technology to generate microwa...

AI Technical Summary

Problems solved by technology

Crystal oscillator frequency doubling technology to generate microwave and millimeter wave sources refers to the generation of microwave and millimeter waves through multiple frequency doubling of crystal oscillators, but as the number of frequency doubling increases, the phase noise will become larger and larger, that is to say, the phase noise will increase with the carrier frequency. The optical beat frequency technology is to input two single-frequency laser signals into the photodetector for "square law" detection, and realize the beat frequency to obtain microwave and millimeter wave signals. This technology has particularly strict requirements on the phase noise of the two lasers, and requires The phase information of the two laser signals must be "synchronized", and the adjustability is poor; the optoelectronic oscillator is an effective way to generate low-phase-noise microwave and millimeter-wave single-frequency point signals, but the frequency of the oscillation signal is limited by optoelectronic devices (mainly electro-optic modulators ) operating frequency

To sum up, the traditional microwave and millimeter wave source generation technology has the disadvantages of poor stability and poor frequency band adjustability.

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