Method and device for generating frequency doubling millimeter wave

Abstract

The embodiment of the invention discloses a method and a device for generating frequency doubling millimeter wave. The method comprises the following steps that: an intensity modulator modulates a radio frequency signal onto an optical wave, outputs an optical carrier and two n-order optical sidebands and separates the optical carrier and the two n-order optical sidebands; a baseband signal is loaded onto the optical carrier via the intensity modulator; the two n-order optical sidebands are locked by a laser; the optical carrier loaded with baseband data and the two locked n-order optical sidebands are subject to four-wave mixing to generate an optical millimeter wave signal with 4n-time frequency of the radio frequency signal; and the optical millimeter wave signal is subject to beat frequency to generate an electric millimeter wave signal. The device comprises: a modulation module, a mode locking module, a four-wave mixing module and a beat frequency module. The invention provides a method and a device for generating frequency doubling millimeter wave, which can generate millimeter wave signals with high frequency and quality by utilizing low radio frequency source.

Description

technical field [0001] The present invention relates to the technical field of optical fiber wireless ROF (Radio-over-Fiber) communication systems, and more specifically, relates to a method and device for generating frequency-multiplied millimeter waves. Background technique [0002] With the increasing demand of users for multimedia and other data services, optical fiber wireless communication will definitely develop towards large capacity and high speed, and millimeter-wave ROF (Millimeter-wave Radio-over-Fiber) technology has high capacity and low cost As well as being suitable for forming a micro-cell or pico-cell system (Pico-cell) and other characteristics, more and more attention has been paid to it, and it has become one of the candidates for the next generation of high-speed mobile communication. [0003] The ROF system consists of three parts: a central station (Central Station, CS), an optical fiber link, and a base station (BaseStation, BS). The optical millime...

AI Technical Summary

Problems solved by technology

However, since the four-wave mixing (FWM) effect is a nonlinear effect, when it is applied in a highly nonlinear optical fiber or a semiconductor optical amplifier (SOA) to achieve frequency doubling, the signal-to-noise ratio of the resulting millimeter wave is low , the phase noise is higher, that is, the quality of mmWave is poor

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