All-optical device for generating sixteen-fold millimeter wave

Abstract

The invention provides a device for generating sixteen-frequency multiplication millimeter waves in full light. An output end of an adjustable laser is connected with an input end of a first dual-parallel Mach-Zehnder modulator; an output end of a radio frequency signal source is connected with a radio frequency drive end of the first dual-parallel Mach-Zehnder modulator; a direct-current voltage source is connected with various sub-modulator bias ports and a primary bias port of the first dual-parallel Mach-Zehnder modulator; an output end of a second dual-parallel Mach-Zehnder modulator is connected with an input end of an erbium-doped optical fiber amplifier; an output end of the erbium-doped optical fiber amplifier is connected with an input end of a photoelectric detector; output optical signals of the erbium-doped optical fiber amplifier can be connected with an optical spectrum analyzer to be tested, and an output end of the photoelectric detector is connected with the optical spectrum analyzer to test. By the device for generating sixteen-frequency multiplication millimeter waves in full light, requirements for local oscillation frequency and response frequency of the modulator are greatly lowered, equipment is simple, practical operability is high, filters are omitted, and application in a WDM (wavelength division multiplex) system can be realized.

Description

technical field [0001] The invention relates to the technical field of optical communication and microwave technology, in particular to a device for generating high-frequency millimeter-wave signals by using relatively mature optical technology in optical communication technology. Background technique [0002] The achievements of information technology marked by computers and communication networks have pushed human society into the information age. In recent years, with the diversification of Internet business forms and the rapid development of business volume, people's demand for multimedia communication including voice, data, image and film and television has become higher and higher and more urgent, and the requirements for network bandwidth and mobility are also higher. High, radio over fiber communication (ROF, radioover fiber) technology application, which combines the advantages of high bandwidth, low loss, anti-electromagnetic interference of optical fiber communica...

AI Technical Summary

Problems solved by technology

Of course, there are still some urgent problems to be solved in the existing optical external modulation schemes: the frequency multiplication factor of the general external modulation system is relatively small, and the microwave signal is not pure enough after frequency multiplication; the structure of the high frequency multiplication system is too complicated, and the modulation index is low. It is not suitable for experimental reality; some schemes using filters will make the system performance unstable and WDM applications cannot be applied due to the change of the central wavelength of the Fiber Bragg Grating (FBG) and the reflectivity is not high enough

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