Microwave photonic third-order intermodulation complete suppression system based on double parallel mach-zehnder modulators (DPMZM)

Abstract

A microwave photonic third-order intermodulation distortion complete suppression system based on the DPMZM comprises a microwave source, a phase control module, a bias control module, a laser, the DPMZM and a photoelectric detector. By the phase control module, the four radio frequency electric signals loaded on the four driving electrodes of the dual driving DPMZM possess the fixed phase difference, a DC bias control unit is combined to carry out the DC bias point control on the uplink MZM and the downlink MZM of the DPMZM, and the phase difference control among the four radiofrequency signals is realized by utilizing two 180-degree phase shifters, thereby realizing the third-order intermodulation complete suppression of a broadband microwave photonic communication link. The microwave photonic third-order intermodulation distortion complete suppression system based on the DPMZM has the characteristics of being low in design complexity, high in stability and good in repeatability and being simple to realize, can solve the broadband microwave photonic communication high linearization demand, and guarantees the high bandwidth and large dynamic range of a broadband microwave photonic communication system.

Description

technical field [0001] The invention relates to a microwave photon third-order intermodulation complete suppression system, in particular to a microwave photon third-order intermodulation complete suppression system based on DPMZM, which belongs to the field of microwave photon technology. Background technique [0002] Microwave photonics technology is increasingly used in fields such as radio frequency electrical signal generation, remote control, electronic warfare systems, and satellite communications. With the development of my country's satellite communication technology, microwave photonic communication systems are developing towards larger capacity, more on-board processing functions, and stronger anti-interference capabilities, all of which need to meet the requirements of high bandwidth and large dynamic range. Microwave photonic communication technology that integrates wide coverage of microwave communication, high flexibility, low loss of optical transmission, and...

AI Technical Summary

Problems solved by technology

[0006] The technical problem solved by the present invention is: in view of the high bandwidth and large dynamic range development requirements of broadband microwave photonic communication, a DPMZM-based microwave photon third-order intermodulation complete suppression system is provided, and the phase control unit is used to make the loading into the dual-drive DPMZM The four RF electrical signals on the four driving electrodes have a fixed phase difference, combined with the DC bias control unit to control the DC bias point of the uplink MZM, downlink MZM and main modulator of the DPMZM, using two 180-degree phase shifters Realize the phase difference control between the four radio frequency signals, and realize the complete suppression of the third-order intermodulation of the broadband microwave photonic communication link. It has the characteristics of low design complexity, simple implementation, high stability and good repeatability, and can solve the problem of broadband microwave High linearization requirements for photonic communication to ensure high bandwidth and large dynamic range of broadband microwave photonic communication systems

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