High-speed laser-microwave link serial-parallel conversion method

Abstract

The invention provides a high-speed laser-microwave link serial-parallel conversion method, and solves the problem that the rates of an existing laser link and an existing microwave link are not matched. The method comprises the following steps: 1) performing speed reduction of a high-speed optical signal: 1.1) converting an M Gbps high-speed NRZ optical signal into an electric signal; 1.2) allowing the electric signals to enter a clock data recovery unit to recover M Gbps data and M / 2 GHz clock signals; 1.3) re-modulating the M Gbps data to an optical carrier through a Mach-Zehnder modulator,and converting the M Gbps data to an M Gbps optical signal; 1.4) allowing the first dual-output Mach-Zehnder modulator to select and separate odd and even channels of the M Gbps optical signals, andoutputting two paths of M / 2 Gbps RZ optical signals with high isolation and low crosstalk; and 2, judging whether the data rate of the output optical signal after speed reduction is smaller than or equal to the maximum value A of the speed reduction output signal or not, if not, continuously reducing the speed until the condition is met, and allowing the 2N paths of M / 2N Gbps RZ signals after speed reduction to enter a D trigger, and outputting 2N paths of M / 2N Gbps NRZ signals.

Description

technical field [0001] The invention belongs to space laser communication technology, in particular to a high-speed laser-microwave link serial-to-parallel conversion method. Background technique [0002] With the rapid development of information technology and space technology, the amount of information acquired by various aircraft in space and near space and needs to be transmitted and processed is showing explosive growth. It is estimated that by 2020, the data rate of synthetic aperture radar will reach 60Gbps, and the data rate of hyperspectral imager will reach 100Gbps. high demands. Compared with microwave communication, satellite laser communication has the advantages of frequency bandwidth, small antenna size, small size, light weight, low power consumption, good confidentiality, strong anti-interference ability, and no frequency supervision restrictions, etc. The integrated information transmission system requires high-speed, large-capacity, multi-service informa...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problem that the rate of the existing laser link and the microwave link does not match, and it is difficult to realize the conversion of the laser signal with a higher rate in the electrical domain, the present invention provides a high-speed laser-microwave link serial-to-parallel conversion method

Images