Wavelength division multiplexing continuous variable quantum key distribution system and method based on optical soliton
A technology of quantum key distribution and wavelength division multiplexing, which is applied in the field of wavelength division multiplexing continuous variable quantum key distribution system based on optical solitons, and can solve the problem that the continuous variable quantum key distribution system needs to be further expanded in large-scale networking and other issues to achieve the effect of improving networking capabilities, improving resistance, and reducing power consumption
Pending Publication Date: 2022-04-05
SHANGHAI JIAO TONG UNIV
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[0005] However, the continuous variable quantum key distribution has not yet utilized the above-mentioned excellent characteristics of optical solitons, and the large-scale networking capability of the continuous variable quantum key distribution system needs to be further expanded
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[0050] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0051] The present invention provides an embodiment, a wavelength division multiplexing continuous variable quantum key distribution system based on optical solitons, including:
[0052] At the sending end, the sending end uses an optical soliton source as a light source and separates it into each wavelength channel; each wavelength channel uses a pilot-assisted feedforward data recovery scheme for continuous variable quantum key distribution;
[0053] Fiber Channel, which transmits the optical si...
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The invention provides a wavelength division multiplexing continuous variable quantum key distribution system based on an optical soliton, and the system comprises a transmitting end which uses an optical soliton source as a light source, and separates the optical soliton source to each wavelength channel; performing continuous variable quantum key distribution on each wavelength channel by using a pilot-assisted feedforward data recovery scheme; the optical fiber channel is used for transmitting the optical signal transmitted by the transmitting end; the receiving end is used for receiving the optical signal transmitted through the optical fiber channel and separating the optical signal to each wavelength channel; and the receiving end uses a local optical soliton source as a light source and separates the local optical soliton source to each wavelength channel for signal heterodyne detection and post-processing to obtain a quantum key. The optical soliton source adopted by the invention has basic technical advantages compared with a discrete laser, and the frequency comb can also reduce the power consumption of a transmitting end. The overall power consumption of the optical soliton source can already compete with commercial integrated tunable laser assemblies of large-scale parallel arrays.
Description
technical field [0001] The invention relates to a continuous variable quantum key distribution system, in particular to a wavelength division multiplexing continuous variable quantum key distribution system and method based on optical solitons. Background technique [0002] Continuously variable quantum key distribution (CV-QKD) using weakly coherent states and homodyne detection is a promising candidate for quantum key distribution due to its compatibility with existing telecommunication equipment and high detection efficiency. Quantum key distribution (QKD) is a method based on the transmission of non-orthogonal quantum states to generate a secret key between two distant parties, Alice and Bob. After transmitting and measuring these quantum states, Alice and Bob exchange classical information, which is post-processed to generate a secure key. In order to prevent man-in-the-middle attacks, Alice and Bob need to verify these classic information in advance (so strictly speak...
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Login to View More IPC IPC(8): H04B10/70H04L9/08H04J14/02
Inventor 息朝祥何广强
Owner SHANGHAI JIAO TONG UNIV