Broadband radio frequency remote optical transmission link and transmission method thereof

Abstract

The invention discloses a broadband radio frequency remote optical transmission link and a transmission method thereof, relating to the microwave photon simulation optical link transmission technology field. The link comprises the following parts: an electric light polarization modulator used for carrying out anti-phase phase modulation on a broadband radiofrequency signal to two carrier wave optical signals of a main shaft and a quadrature shaft and outputting the two carrier wave optical signals to a polarization analyzer; the polarization analyzer used for outputting a modulation optical signal setting a polarization direction; a detector used for demodulating an input modulation optical signal, realizing direct noncoherent synthesis of power, and recovering broadband radio frequency information loaded on the modulation optical signal. The transmission link and the method in the invention have the characteristics of realization of broadband dispersion compensation, simple link structure, low cost and easy adjusting control.

Description

technical field [0001] The invention relates to the technical field of microwave photon analog optical link transmission, in particular to a broadband radio frequency remote optical transmission link and a transmission method. Background technique [0002] Optical fiber links are widely used in fiber-to-the-home networks, remote antennas, and wireless-over-fiber systems. Compared with traditional coaxial cables, optical fiber transmission has many advantages such as small size, light weight, wide frequency bandwidth, large communication capacity, high safety performance, and anti-electromagnetic interference. Therefore, the radio frequency signal is carried on the optical carrier, using optical fiber Signal transmission has become the most important way of information transmission in the current communication network and future multimedia communication applications. However, the dispersion effect of optical fiber links will lead to signal power attenuation, especially when ...

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Problems solved by technology

[0006] 2. Compensation bandwidth is limited

The received microwave signal needs to be divided into two channels to drive two modulators through the microwave power division structure. Due to the limitation of the bandwidth of the microwave power division structure, the compensation bandwidth of the entire dispersion compensation system is limited.

[0007] 3. Due to the different structural designs of the phase modulator and the intensity modulator, the half-wave voltage and the difference in the optical power and microwave power, it is necessary to realize the power fading effect caused by the dispersion of the upper and lower signals and the frequency response into a strict complementary relationship. The adjustment and calibration of the whole system will be more complicated

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