Wideband-simulated photon link dispersion decline compensation scheme based on intensity modulation diversity transmitter

Abstract

The invention discloses a wideband-simulated photon link dispersion decline compensation scheme based on an intensity modulation diversity transmitter. A wideband-simulated photon link dispersion decline compensation mechanism consisting of a sending end and a receiving end is adopted, wherein the sending end consists of a light source and an intensity modulation diversity transmitter, and the receiving end consists of a single-mode fiber and a photoelectric detector; and mutual compensation is achieved through diversity transmission by utilizing the characteristic that the two paths of intensity signals of the diversity transmitter have different dispersion decline frequency points in the transmission of the single-mode fiber. According to the invention, under the condition that only one light source and one modulator is used, the wideband-simulated photon link dispersion decline compensation scheme which can enable the maximum power fluctuation of a radio-frequency signal to be 4-dB in the 20G Hz bandwidth range is finally obtained by adjusting the analyzing degree of two paths of modulating signals and delay inequality, and the scheme has the advantages of simple structure, low cost, easiness in achievement and large compensation range.

Description

technical field [0001] The invention relates to the fields of microwave photonics and optical fiber communication, especially the technical field of microwave signal dispersion fading compensation. Background technique [0002] Microwave photonics is a subject that uses optical methods to realize microwave signal processing. Because photonic technology has the advantages of large bandwidth, strong parallel processing capability, small size, light weight, and anti-electromagnetic interference, the optical processing of microwave signals is expected to solve the bottleneck problems of small processing bandwidth, slow speed, and weak processing capability of existing microwave systems. Microwave photonic technology includes microwave signal generation, transmission, filtering, delay and many other aspects, and has broad application prospects in communication, radar, phased array antenna and other fields. With the continuous development and maturity of lasers and optical fibers...

AI Technical Summary

Problems solved by technology

Although the existing dispersion compensation mechanisms can well compensate for the dispersion fading of microwave signals, these schemes still have various deficiencies, such as the need to strictly control the transmission parameters to avoid modulation point drift, limited dispersion fading compensation capabilities, relatively complex structure and relatively high cost, etc.

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