A quantum communication terminal based on polarization coding
A quantum communication and polarization technology, applied in the field of communication, can solve the problems of slow modulation speed and large channel noise disturbance, and achieve the effect of improving the bit error rate
Active Publication Date: 2020-05-08
BEIJING INST OF AEROSPACE CONTROL DEVICES
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Problems solved by technology
[0008] The technical problem to be solved by the present invention is: Aiming at the deficiencies of the prior art, a quantum communication terminal based on polarization coding is proposed, which solves the current Polarized quantum communication terminals have the problems of slow modulation speed and large channel noise disturbance
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[0021] The quantum communication terminal based on polarization coding according to the present invention will be further described in detail below with reference to the drawings and specific embodiments.
[0022] As shown in the figure, the quantum communication terminal based on polarization encoding according to the present invention mainly includes the following parts: the transmitting end ( figure 1 ) and receiver ( figure 2 ); These two parts are connected by a quantum channel (a channel for transmitting quantum states) and a synchronous channel (a signal for transmitting synchronous light), wherein the quantum channel refers to the path for transmitting optical signals, and the synchronous channel refers to the path for transmitting synchronous signals.
[0023] like figure 1 The transmitting end of the quantum communication terminal based on polarization encoding shown in the present invention includes a transmitting end computer 1 , a transmitting end control board ...
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The invention discloses a quantum communication terminal based on polarization encoding. A receiving end adopts a four-channel laser to transmit signal light and cooperates with a fixed optical path to implement signal modulation, and the receiving end adopts a four-channel single photon detector and the fixed optical path to implement real-time signal demodulation, thereby, the problem of slow signal modulation speed and large channel noise disturbance in a current quantum communication terminal can be solved. The terminal comprises a computer, a control board, a laser, a polarization beam splitter, a polarization controller, a beam splitter, an attenuator, a polarization compensator and a single photon detector, wherein a transmitting end sends information to the control board through the computer, a board card encodes the information and then drives the corresponding laser to emit an optical signal, the optical signal is modulated through the fixed optical path, the modulated optical signal is sent to the receiving end through a quantum channel, the optical signal is subjected to signal demodulation through the fixed optical path at the receiving end, and the signal is finally sent to the control board for analysis, and the communication is finally implemented.
Description
technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a quantum communication terminal based on polarization encoding. Background technique [0002] Cyberspace security incidents such as "Stuxnet Attack" and "Color Revolution" have appeared one after another, marking that the main threat of cyberspace has completed the upgrade from "bad boys doing evil" to "big players fighting", and all countries are speeding up research and development and construction In the construction of a new type of national cyberspace security, the United States has incorporated cyberspace security into the scope of its national security strategy. Its Ministry of Defense has established a cybersecurity command, from supporting research and development of basic platforms to developing and equipping a large number of cyberspace weapon systems with specific functions. Fully guarantee its cyberspace security. [0003] In recent years, informa...
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IPC IPC(8): H04L9/08
CPCH04L9/0852
Inventor 褚鑫张安宁贾鲁宁何娇王天顺张天宇
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES