Simulative microwave optical link amplitude and phase regulating and controlling device

Abstract

A simulative microwave optical link amplitude and phase regulating and controlling device comprises a single microwave optical transmission link, and the microwave optical transmission link is formed by connecting a laser, an outer modulator, a transmission optical fiber and an optical detector in sequence. The simulative microwave optical link amplitude and phase regulating and controlling device is characterized in that the simulative microwave optical link amplitude and phase regulating and controlling device is composed of an amplitude regulating module, a phase regulating module and a control module, wherein the amplitude regulating module and the phase regulating module can independently regulate and control related parameters in an optical domain. The simulative microwave optical link amplitude and phase regulating and controlling device has the advantages that the regulation of the amplitude and the regulation of the phases of a simulative microwave optical link can be carried out independently, mutual interference can be avoided, regulating modes are various, regulation flexibility is large, and regulation accuracy is high; meanwhile, regulation and control measures are all completed in the optical domain, and the problem of limitation of signal bandwidths is solved.

Description

technical field [0001] The invention relates to an analog microwave optical link signal modulation technology, in particular to an analog microwave optical link amplitude and phase control device. Background technique [0002] In recent years, analog microwave photon transmission technology has attracted more and more attention from the industry due to its characteristics such as low transmission loss, large bandwidth, anti-electromagnetic interference, portability and flexibility. [0003] Such as figure 1 As shown in the figure, the structure shown in the figure is a typical externally modulated microwave optical transmission link. The optical transmission link is composed of four main parts: laser, external modulator, transmission fiber and optical detector. Among them, the laser is used to output as The light wave used by the optical carrier, the external modulator is used to load the radio frequency electrical signal on the optical carrier to form an optical microw...

AI Technical Summary

Problems solved by technology

[0004] Since the formation of the beam network needs to perform weighted processing on the amplitude and phase of multiple signals, it is necessary to fine-tune the amplitude and phase of the optical-borne microwave signal in a single analog microwave optical link; in the prior art, the analog microwave optical When adjusting the amplitude and phase of the link, the following methods are generally used: first restore the microwave signal carried by light to an electrical signal, and then adjust the amplitude and phase of the electrical signal in the radio frequency domain. The phase shifter is used for regulation and control, wherein, the electric attenuator is used for regulating the amplitude of the electric signal, and the electric phase shifter is used for regulating the phase of the electric signal; While adjusting the phase, due to its own characteristic limitations, it will inevitably affect the signal amplitude, resulting in independent amplitude and phase regulation; secondly, with the increase of the frequency or bandwidth of the RF signal and the expansion of the link scale, Electric attenuators and electric phase shifters cannot handle broadband signals, and have great limitations in application

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