Method and device for detecting microwave signal types and frequency based on photon technology
A technology of microwave signal and frequency detection, applied in frequency measurement devices, measurement devices, measurement electricity and other directions, can solve the problems of lack of large instantaneous bandwidth, wide coverage and strong anti-electromagnetic interference performance.
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[0035] The implementation of the present invention will be further described below in conjunction with the accompanying drawings.
[0036] Such as figure 1 Shown, realize the device of the inventive method by two continuous laser sources 10 and 11, two optical couplers 20 and 21, electro-optic modulator 30, time delay element 40, two erbium-doped fiber amplifiers 50 and 51, two Optical frequency mixing elements 60 and 61, two optical filters 70 and 71, two low-speed optical detectors 80 and 81, and a type resolution and frequency measurement circuit module 90 are formed.
[0037] Under the action of the optical coupler 20, the output optical signals of the laser light sources 10 and 11 (the corresponding angular frequencies are ω 1 and ω 2 ) enter the electro-optic modulator 30 together. Under small signal intensity modulation, the two modulated optical signals can be expressed as: with Then, under the action of the optical coupler 21, it is divided into a delay branch ...
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