High Speed ​​Laser-Microwave Link Serial-to-Parallel Conversion Method

Abstract

The invention provides a high-speed laser-microwave link serial-to-parallel conversion method, which solves the problem of the speed mismatch between the existing laser link and the microwave link. The method comprises the following steps: 1) slowing down the speed of the high-speed optical signal, 1.1) converting the M Gbps high-speed NRZ optical signal into an electrical signal; 1.2) entering the electrical signal into the clock data recovery unit to recover the M Gbps data and the M / 2 GHz clock signal; 1.3 ) M Gbps data is re-modulated to the optical carrier by the Mach-Zehnder modulator and converted into a M Gbps optical signal; 1.4) The first dual-output Mach-Zehnder modulator selects and separates the odd-even channel of the M Gbps optical signal, and outputs 2 channels M / 2 Gbps RZ optical signal with high isolation and low crosstalk; Step 2: Determine whether the data rate of the output optical signal after deceleration is less than or equal to the maximum value A of the decelerated output signal; if not, continue to decelerate until the condition is met ;2 after deceleration N Road M / 2 N Gbps RZ signal enters D flip-flop, output 2 N Road M / 2 N Gbps NRZ signal.

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...

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