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Device and method for realizing frequency measurement of multifrequency microwave signals by using Brillouin scattering

A microwave signal, stimulated Brillouin technology, used in transmission monitoring/testing/fault measurement systems, electromagnetic wave transmission systems, electrical components, etc., can solve problems such as limited resolution, and achieve high resolution and wide measurement range. Effect

Inactive Publication Date: 2012-07-04
ZHEJIANG UNIV
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Problems solved by technology

However, the current research on microwave frequency measurement based on microwave photonics is basically only applicable to single-frequency microwave signals, and the resolution is limited

Method used

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  • Device and method for realizing frequency measurement of multifrequency microwave signals by using Brillouin scattering
  • Device and method for realizing frequency measurement of multifrequency microwave signals by using Brillouin scattering
  • Device and method for realizing frequency measurement of multifrequency microwave signals by using Brillouin scattering

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with accompanying drawings and examples.

[0012] The invention realizes the single-sideband modulation of a certain frequency in the multi-frequency microwave signal to be measured through the frequency sweep signal, and then detects the microwave power of the frequency. The multi-frequency microwave signal is modulated onto the light by a phase modulator, and the microwave signal cannot be detected behind the high-speed detector due to the phase difference of the two sidebands. When the optical double sideband phase modulation signal is optically processed by stimulated Brillouin scattering to realize a selective optical single sideband modulation signal, the microwave power can be detected. At this time, the frequency difference between the sweeping frequency and the Brillouin frequency shift of the optical fiber is the frequency of the unknown microwave signal. Through the synchronization of frequ...

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Abstract

The invention discloses a device and a method for realizing frequency measurement of multifrequency microwave signasl by using stimulated Brillouin scattering. At present, the microwave photonics based researches on microwave frequency measurement are only suitable for single-frequency microwave signals and limited in resolution ratio. According to the invention, the phase of a multifrequency microwave signal to be measured is modulated onto light, the phase-modulated double-sideband signal is optically processed with a frequency-sweep carrier-suppression double-sideband signal by using the stimulated Brillouin scattering to obtain a selective single-sideband optically modulated signal, meanwhile, the detections on the frequency-sweep signal and the microwave power of the modulated signal are synchronized. When the microwave power can be detected, the frequency difference between the frequency of the sweep frequency and optical fiber Brillouin frequency shift is the frequency of the unknown microwave signal at the moment. The device and the method disclosed by the invention inherit the general advantages of microwave photon measurement, can be used for measuring all frequency information of microwave signals containing multifrequency information and simultaneously has very high resolution ratio.

Description

technical field [0001] The invention relates to the technical field of microwave frequency measurement, in particular to a device and method for realizing multi-frequency microwave signal frequency measurement by using Brillouin scattering. Background technique [0002] Microwave photonics is an emerging interdisciplinary subject involving microwave engineering and photonics. Its research content involves various fields related to microwave technology and optical fiber technology. The problems in development include the research of lasers, optical modulators, amplifiers, detectors and optical fiber transmission links; the second is to use optoelectronic devices to solve the generation and control of microwave signals, mainly microwave photonic filters, optical domain microwave amplifiers, arbitrary Waveform microwave signal generation, etc. Compared with electronics, microwave photonics has many advantages, such as low loss, light weight, small size, high bandwidth, and ant...

Claims

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Application Information

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IPC IPC(8): H04B10/08H04B10/07
Inventor 郑史烈潘敏章献民池灏金晓峰
Owner ZHEJIANG UNIV
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