Device for all-optically generating six-time frequency high-speed millimeter wave

Abstract

The invention discloses a method for all-optically generating a high-speed millimeter wave in a radio over fiber system, and belongs to the technical field of optical communication. In the method, two standard Mach-Zehnder modulators are cascaded mutually and are respectively driven by low-speed radio frequency signals; and the high-speed millimeter wave with the repetition frequency which is six times that of the frequency of a radio frequency signal is obtained by selecting bias points of the two Mach-Zehnder modulators to respectively serve as a highest point and a lowest point of a transmission curve and simply controlling the amplitude and the phase of radio frequency drive signals of the two Mach-Zehnder modulators. In the device, a linear light frequency multiplication technology is adopted, so that the generated millimeter wave has very high spectrum purity and phase coherence. The technology does not need expensive high-speed photoelectric devices and a complex nonlinear signal processing technology, greatly reduces configuration cost, and simplifies a system structure. If high-speed devices are adopted, a frequency band over 100-GHz can be improved very easily without changing the structure of the system. Therefore, the method has a wide application prospect in future wireless broadband communication.

Description

technical field [0001] The present invention relates to a method and a device in the technical field of optical communication, specifically, a device for all-optical generation of a six-fold frequency high-speed millimeter wave. Background technique [0002] Wireless communication over optical fiber is an emerging technology. It mainly combines the two major technologies of optical fiber and wireless communication, and uses the characteristics of low loss and high bandwidth of optical fiber to improve the bandwidth and mobility of wireless access network, and provide users with "anytime, anywhere , any business” wireless access service. Compared with traditional wireless systems, wireless communication over optical has the advantages of wider cellular coverage, higher bandwidth, lower configuration costs, lower power consumption, and easy dynamic management and maintenance, etc., and can achieve more than 1Gbit / s Ultra-broadband wireless access is a very competitive solutio...

AI Technical Summary

Problems solved by technology

The traditional method of generating high-frequency millimeter waves by electricity is limited by technology and technology, the configuration cost is high, the system is complex, the tuning range of the high-frequency millimeter waves obtained is narrow, the amplitude-frequency characteristics are poor, and the phase noise is high, so it cannot be used very well. Meet practical needs, especially for high-frequency signals exceeding 100-GHz, the current method of electrical generation is still difficult to achieve

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