A device for generating millimeter waves based on pdm-dpmzm modulator

Abstract

The invention discloses a device for generating millimeter waves based on a PDM-DPMZM modulator. The device is provided with the PDM-DPMZM modulator and comprises an upper branch DPMZM 1 and a lower branch DPMZM2; the DPMZM 1 comprises MZM1-a and MZM1-b; and the DPMZM2 comprises MZM2-a and MZM2-b. The device disclosed by the invention generates millimeter wave signals with frequency being 8 times as large as that of local oscillator signals by means of the non-linearity and polarization multiplexing properties of the PDM-DPMZM modulator, thereby reducing the requirements for the frequency of radio frequency local oscillator signals and the response frequency of the modulator, and thus the system cost is reduced. The device disclosed by the invention requires no special modulation index and adjusts the radio frequency signals flexibly, thereby reducing the requirements for the radio frequency power, the unnecessary frequency is counteracted by polarization multiplexing to acquire a relatively pure radio frequency spurious suppression ratio of eight times of frequency or higher, the radio frequency spurious suppression ratio can be up to 58 dB in the scheme, when the modulation index is 3.35-4.71, the acquired radio frequency spurious suppression ratio of eight times of frequency is nearly kept unchanged, and thus the amplitude drift problem of a radio frequency signal source is solved. The device disclosed by the invention requires no DC offset, thereby solving the DC drift problem.

Description

technical field [0001] The invention belongs to the fields of communication technology and microwave technology, in particular to a device for generating millimeter waves based on a PDM-DPMZM modulator. Background technique [0002] At present, 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 video is getting higher and higher and more urgent, and the requirements for network bandwidth and mobility are also getting higher and higher. come higher. High-bandwidth, low-loss, low-cost, and easy-to-maintain optical fiber communication technology has gradually become the first choice for high-speed broadband networks. High-flexibility, high-mobility wireless communication technology makes communicat...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a device for generating millimeter waves based on a PDM-DPMZM modulator, which aims to reduce the frequency index of equipment required to generate high-frequency / very high-frequency signals, thereby reducing system costs and generating octaves. The problem of amplitude drift and DC drift of medium RF signal source

Images