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Quantum-classic common fiber transmission system and method based on mode division multiplexing

A technology of mode division multiplexing and mode demultiplexing, applied in wavelength division multiplexing systems, transmission systems, digital transmission systems, etc., can solve problems such as poor safety performance and complicated methods, and achieve safety performance improvement, non-linear Effect reduction, reducing the effect of non-linear effects

Active Publication Date: 2020-05-15
GUANGDONG INCUBATOR TECH DEV CO LTD
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Problems solved by technology

[0009] "Existing technology patent: (CN 108631904) provides a method for damage compensation of a mode division multiplexing system based on the lattice protocol, but the method is relatively complicated, and the QKD technology is not used, and the safety performance is not good

Method used

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  • Quantum-classic common fiber transmission system and method based on mode division multiplexing
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  • Quantum-classic common fiber transmission system and method based on mode division multiplexing

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Embodiment 1

[0046] Such as figure 1 shown;

[0047] A quantum-classical co-fiber transmission system based on mode division multiplexing, including 2 classical signal transmitters, QKD transmitter, first mode multiplexer, second mode multiplexer, EDFA, mode demultiplexer , a MIMO digital signal processing unit, 2 classical signal receivers, a QKD receiver and a transmission link; the transmission link uses a few-mode fiber and includes N erbium-doped fiber amplifiers.

[0048] The two classical signal transmitters are respectively connected to the first mode multiplexer, and the first mode multiplexer is connected to the EDFA through FMF; the QKD transmitter is connected to the first mode multiplexer respectively To one end of the second mode multiplexer; the other end of the second mode multiplexer is connected to the mode demultiplexer through FMF; the mode demultiplexer is connected to the MIMO digital signal processing unit One end is connected, and the other end of the MIMO digital...

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Abstract

The invention discloses a quantum-classic common fiber transmission system based on mode division multiplexing. The quantum-classic common fiber transmission system comprises two classic signal transmitters, a QKD transmitter, a first mode multiplexer, a second mode multiplexer, an EDFA, a mode demultiplexer, an MIMO digital signal processing unit, two classic signal receivers, a QKD receiver anda transmission link. The transmission link adopts few-mode optical fiber transmission and comprises N erbium-doped optical fiber amplifiers. The receiving end comprises a mode demultiplexer, a digitalsignal processing MIMO, two classic signal receivers and a QKD receiver. On the basis of increasing the transmission capacity through mode division multiplexing, the power of the pump light in the erbium-doped optical fiber amplifier can be automatically adjusted according to the bit error rate of a classic signal receiving end and the bit error rate of a quantum signal receiving end, and MDL damage in an MDM system is reduced.

Description

technical field [0001] The invention relates to the field of quantum secure communication, in particular to a system and method for quantum-classical co-fiber transmission based on mode division multiplexing. Background technique [0002] With its advantages of large capacity, strong anti-interference, and low loss, optical fiber has become the main medium for network transmission. With the continuous acceleration of social informatization, people's demand for optical fiber capacity continues to increase. Researchers from various countries continue to try to use various degrees of freedom of optical fibers, such as time, frequency, polarization state, phase, etc., to study different multiplexing technologies. To expand the capacity of the optical fiber, but these are realized by using single-mode optical fiber. However, with the growth of fiber capacity, the nonlinear effect of fiber in these systems is getting stronger and stronger, and it has gradually approached the Shan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J14/02H04B10/294H04B10/54H04B10/70H04L9/08
CPCH04J14/0241H04B10/70H04B10/54H04B10/2942H04L9/0852H04L9/0858H04L9/0838Y02D30/70
Inventor 郭邦红陈璁胡敏
Owner GUANGDONG INCUBATOR TECH DEV CO LTD
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