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Preparation method and device of decoy state quantum light source with high-speed polarization encoding

A decoy state quantum, high-speed technology, applied in key distribution, can solve problems such as increasing system complexity, reducing system compactness, and being unfavorable for QKD system engineering integration, achieving the effect of avoiding quantum attacks, compact structure, and small size

Active Publication Date: 2016-09-07
重庆渝研激光科技有限公司 +1
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Problems solved by technology

Combined with the decoy state scheme, the system needs a total of eight laser diodes, which undoubtedly increases the complexity of the system, reduces the compactness of the system, and is not conducive to the engineering integration of the QKD system

Method used

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  • Preparation method and device of decoy state quantum light source with high-speed polarization encoding
  • Preparation method and device of decoy state quantum light source with high-speed polarization encoding
  • Preparation method and device of decoy state quantum light source with high-speed polarization encoding

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Embodiment

[0038] refer to figure 1 The device of the present invention includes a high-speed logic control chip, a decoy state optical pulse drive module, a high-speed phase modulator drive module, a laser diode, a high-speed phase modulation polarization rotation module and an optical attenuator, and the high-speed logic control chip is connected to the decoy state optical pulse The drive module is connected to the high-speed phase modulator drive module one way, the decoy state optical pulse drive module is connected to the laser diode, the output optical signal of the laser diode is connected to the high-speed phase modulation polarization rotation module through the optical fiber, and the high-speed phase modulator drive module is connected to the high-speed phase modulation polarization rotation module , the high-speed phase modulation polarization rotation module is connected to the optical attenuator; wherein the decoy state optical pulse drive module receives the control signal ...

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Abstract

The present invention discloses a high -speed polarization encoding method and device and device. Its device includes high -speed logical control chips, deceiving state light pulse driving modules, high -speed phase modulator driving modules, laser diode, high -speed phase modulation polarization rotating moduleAnd the light atomer, wherein the lure module driving module receives the control signal from the high -speed logic control chip, which is based on the proportion of the mood light source implementation scheme, the random modulation to generate three pulse electrical pulse signals to generate three pulse amplitude, and the driver is driven.The laser diode outputs three kinds of light -intensive deceived state of light pulse, which seduces the deception of the state of light pulse signals via a high -speed phase modulation polarizing rotation module to randomly prepares "line partial" and "round partial" of the high -speed phase modulation.The species is vibrated, and then at the attenuator at the optical attenuation to the single light level.The present invention can generate three average photon intensity and four polarized state of nine quantum states in high speed random modulation.

Description

technical field [0001] The invention belongs to the category of quantum key distribution, and in particular relates to the preparation of a decoy quantum state suitable for a high-speed polarization coding quantum key distribution (QKD) system, that is, a preparation method and device for a high-speed polarization coding decoy state quantum light source. Background technique [0002] Quantum cryptography originated from the "BB84 protocol" proposed by Bennett and Brassard in 1984. Compared with traditional encryption methods based on algorithm complexity, the security of Quantum Key Distribution (QKD) is determined by the basic principles of physics. Guaranteed, and therefore an absolutely secure means of communication that cannot be cracked. The existing mainstream QKD system mainly consists of the following three schemes: the QKD scheme based on "plug & play" phase encoding, the QKD scheme based on polarization encoding, and the QKD scheme based on entangled photon pairs. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/08
Inventor 曾卓西杜海彬曾和平
Owner 重庆渝研激光科技有限公司
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