A weak signal detection amplification system and method based on an optoelectronic oscillator

A photoelectric oscillator and amplifying system technology, applied in the field of microwave photonics, can solve the problems of small detection frequency range, loss, and insignificant amplification effect, and achieve the effect of improving the gain effect and widening the detection range.
CN109842444AActive Publication Date: 2019-06-04INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
Publication Date
2019-06-04

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Abstract

The invention provides a weak signal detection amplification system based on an optoelectronic oscillator and a detection amplification method thereof, and belongs to the technical field of microwavephotonics. The weak signal detection amplification system based on the optoelectronic oscillator comprises a laser, a beam splitter, a phase modulator, a high-nonlinearity optical fiber, a circulator,a photoelectric detector, a power divider, a coupler, an electric amplifier, an intensity modulator, an adjustable optical attenuator and a radio frequency source. Wherein the laser is connected withthe beam splitter, the beam splitter is respectively connected with the phase modulator and the intensity modulator, and the phase modulator, the circulator, the photoelectric detector, the power splitter, the coupler and the electric amplifier are sequentially connected end to end to form a loop; Wherein the intensity modulator, the variable optical attenuator and the circulator are sequentiallyconnected, the radio frequency source is connected to the intensity modulator, and the phase modulator is connected with the circulator through a high-nonlinearity optical fiber. By adjusting the radio frequency source and the adjustable optical attenuator, rapid and high-precision weak signal detection and amplification can be realized.
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Description

technical field

[0001] The invention relates to the technical field of microwave photonics, in particular to a system and method for detecting and amplifying weak signals based on a photoelectric oscillator. Background technique

[0002] Fast frequency measurement plays an increasingly important role in systems such as radar and electronic stations, but the premise of fast frequency measurement is that the system can distinguish the received signal, especially for the detection of weak signals. It is particularly important to detect and amplify the signal with a wide frequency band and high power. For the detection and amplification of weak signals, in its electronic solution, very narrow filters and amplifiers are used, but the realization of this solution is particularly difficult because of the technical development and the noise introduced by the electric amplifier. Microwave photonics method is adopted by more and more people because of its advantages of large bandwidt...

Claims

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