Quantum communication system, transmitting end thereof and quantum communication method

A quantum communication and transmitter technology, applied in the field of optical communication, can solve the problems of low energy utilization rate, low coding rate, inconvenient quantum communication system popularization and application of quantum communication methods, etc.

Active Publication Date: 2019-12-27
QUANTUMCTEK
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  • Abstract
  • Description
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Problems solved by technology

[0004] In the prior art, the quantum communication system and quantum communication method still have the problems of low energy utilization rate and low coding ra...

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  • Quantum communication system, transmitting end thereof and quantum communication method
  • Quantum communication system, transmitting end thereof and quantum communication method
  • Quantum communication system, transmitting end thereof and quantum communication method

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Embodiment Construction

[0097] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0098]Time-phase (bit) coding is an important coding method gradually emerging in quantum communication in recent years. Use the time bits to represent the Z basis, and the phase bits to represent the X or Y basis. One bit is represented using two slots. When only one of the two time slots has a light pulse, it becomes a time bit, the light pulse in the previous time slot represents bit 0, and the light pulse in the latter time slot represents bit 1; when bot...

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Abstract

The invention discloses a quantum communication system, a transmitting end thereof and a quantum communication method. An initial laser signal is emitted at a transmitting end through the same laser;the consistency of laser pulses is ensured; the polarization state of the laser pulse in the laser signal emitted by the emitting end is controlled; the polarization states of two adjacent laser pulses are different, the transmission paths of the laser pulses in different polarization states can be conveniently controlled at a receiving end, and when the laser pulses in different polarization states interfere with each other, the utilization of 100% interference energy can be realized, the energy loss is avoided, and the energy utilization rate and the code rate are improved. Therefore, according to the quantum communication system and the quantum communication method provided by the technical scheme of the invention, the energy utilization rate, the safety and the code forming rate are improved, and popularization and application of the quantum communication system and the quantum communication method are facilitated.

Description

technical field [0001] The present invention relates to the technical field of optical communication, and more specifically, relates to a quantum communication system, a transmitting end thereof, and a quantum communication method. Background technique [0002] Quantum Key Distribution (Quantum Key Distribution, QKD) technology can generate a completely consistent unconditional security key between the two parties in communication, so it has attracted extensive attention. The fundamental difference between Quantum Key Distribution (QKD) and the classical key system is that it uses a single photon or entangled photon pair as the carrier of the key, which is based on the three basic principles of quantum mechanics (Heisenberg’s uncertainty principle, Measurement collapse theory, quantum non-cloning law) ensure the uneavesdropping and undecipherability of the process, thus providing a more secure key system. [0003] Since the proposal of the BB84 scheme in 1984, various theor...

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Application Information

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IPC IPC(8): H04B10/70H04L9/08
CPCH04B10/70H04L9/0858
Inventor 李东东汤艳琳刘仁德
Owner QUANTUMCTEK
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