Spatial directional angle measuring system based on all-optical cross polarization modulation

Abstract

The invention discloses a spatial directional angle measuring system based on all-optical cross polarization modulation. The spatial directional angle measuring system comprises a first mach-zehnder intensity modulator, a polarization controller, a second mach-zehnder intensity modulator, a polarization controller I, an electric coupler, a microwave phase shifter, a polarization controller II, an optical fiber online polarizer, an optical band pass filter, a photoelectric detector, an offset T and a voltmeter, wherein the first mach-zehnder intensity modulator and the polarization controller are connected with a first laser light source; the second mach-zehnder intensity modulator and the polarization controller I are connected with a second laser light source; the electric coupler and the microwave phase shifter are connected with a microwave signal source; the polarization controller III, the optical fiber online polarizer, the optical band pass filter, the photoelectric detector, the offset T and the voltmeter are sequentially connected with the optical coupler. The spatial directional angle measuring system based on all-optical cross polarization modulation can be used for solving the problem of difficulty in quickly identifying antenna signal directional position information in an optically controlled phased array radar, and can be used for realizing primary measurement of an antenna spatial directional angle based on an all-optical cross polarization modulation method.

Description

technical field [0001] The invention belongs to the field of microwave photonics, and more specifically relates to a space orientation angle measurement system based on all-optical cross-polarization modulation. Background technique [0002] Since the 1980s, with the development of light-borne microwave signal modulation technology and semiconductor optoelectronic technology, researchers' idea of ​​applying optical transmission system to optical control phase control radar system has been developed rapidly. Because the frequency of the optical carrier is extremely high, and the optical line has the advantages of stable transmission, the microwave bandwidth is very small compared with the frequency of the optical carrier. In the optical control radar system, researchers are eager to apply the advantages of optical bandwidth to microwave to the maximum extent. The field of signal transmission. Therefore, it is of great significance to study all-optical microwave signal transm...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a spatial orientation angle measurement system based on all-optical cross-polarization modulation, which can solve the difficult problem of quickly identifying the direction and position information of antenna signals in optically controlled phase-controlled radars, and can be based on all-optical cross-polarization modulation. The Modulation Method Realizes the Preliminary Measurement of Antenna Spatial Direction Angle

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