Wideband analog signal linear optical fiber transmission system

Abstract

The present invention provides a wideband analog signal linear optical fiber transmission system. The wideband analog signal linear optical fiber transmission system includes the following components of: an analog radio frequency signal source used for transmitting analog radio frequency signals; a power divider used for dividing the analog radio frequency signals into two paths and loading the two paths of analog radio frequency signals onto two electro-optic intensity modulators respectively so that the analog radio frequency signals can be adopted as modulation signals; an analog radio frequency signal delay device used for delaying the analog radio frequency signals; a first light source and a second light source which are used for generating carrier optical signals; a single-output electro-optic intensity modulator used for performing electro-optic intensity modulation on transmitted modulation signals; a wavelength division multiplexer used for receiving two paths of optical signals and outputting the optical signals to a double-output electro-optic intensity modulator so that the optical signals can be adopted as carrier signals; the double-output electro-optic intensity modulator which is used for performing electro-optic intensity modulation on transmitted modulation signals; and a balance photoelectric detector used for receiving optical signals modulated by the double-output electro-optic intensity modulator and converting the optical signals into corresponding electrical signals. With the wideband analog signal linear optical fiber transmission system of the invention adopted, the defect of serious nonlinear distortion in the prior art can be eliminated.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to a broadband analog signal linearization optical fiber transmission system. Background technique [0002] Optical fiber communication is one of the fastest-growing high-tech fields at present. It has the advantages of large communication capacity, high transmission quality, good confidentiality, anti-electromagnetic interference, anti-radiation, small size, and light weight. It is the main form of information transmission today. [0003] In the traditional analog signal optical fiber communication system, the existing modulation method is mainly based on the intensity modulation of a single modulator. Due to the obvious third-order intermodulation interference in the traditional intensity modulation method, the nonlinear distortion of the signal in the optical fiber communication system is relatively large. [0004] Therefore, in order to improve the nonlinear...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the shortcomings of the existing traditional analog signal optical fiber transmission technology with large nonlinear distortion, the present invention provides a broadband analog signal linearized optical fiber transmission system to improve the above problems

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