Tangled photon source

A photon source and photon technology, applied in the field of entangled photon sources, can solve problems such as the inability of quantum communication networks and quantum repeaters to achieve correlation

Active Publication Date: 2012-09-05
北京量子体系科技股份有限公司
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  • Abstract
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Problems solved by technology

However, the photon wavelength used in optical fiber quantum communication is the optical fiber propagation window near 1550nm, while the optical window used b

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Embodiment Construction

[0018] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] See figure 1 , figure 1 is a schematic block diagram of an entangled photon source according to a first embodiment of the present invention. Such as figure 1 As shown, the entangled photon source of the present invention mainly includes a light source system 10 and a conversion system 11 . In this embodiment, the light source system 10 is used to generate the first pump light with a wavelength of 518nm. The conversion system 11 is used to generate entangled photon pairs with wavelengths of 1550nm and 780nm under the action of the first pump light, and separate the entangled photon pairs to form the first output light and the second output light. In a preferred embodiment, the light source system 10 generates the first pump light in a pulsed manner.

[0020] In traditional entangled photon sources, the wavelengths of entangled photons are g...

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Abstract

The invention discloses a tangle photon source, comprising a light source system and a conversion system. The light source system is used for generating a first pump light with the wavelength of 518nm. The conversion system is used for generating tangled photon pairs with the wavelengths of 1550nm and 780nm respectively under the action of the first pump light and separating the tangled photon pairs, so as to form a first output light and a second output light. By adopting the manner, the tangled photon source disclosed by the invention generates the tangled photon pairs with the wavelengths of 1550nm and 780nm respectively by utilizing the pump light with the wavelength of 518nm, and further the tangled photo source can be used for being correlated with a quantum communication network and a quantum repeater.

Description

technical field [0001] The invention relates to the field of quantum optics, in particular to an entangled photon source. Background technique [0002] At present, in the quantum communication network, the quantum key distribution technology based on decoy state is widely used. However, due to the limitation of the basic principle of the decoy state scheme, the decoy state scheme cannot realize the global quantum communication network. Global quantum communication must adopt another solution, that is, a quantum key distribution network based on quantum repeaters. However, the photon wavelength used in optical fiber quantum communication is the optical fiber propagation window near 1550nm, while the optical window used by quantum repeaters is generally 780nm or 795nm, resulting in the inability to achieve association between quantum communication networks and quantum repeaters. Therefore, it is necessary to develop a source of entangled photons capable of associating quantu...

Claims

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Application Information

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IPC IPC(8): G02F1/35G02B27/28
Inventor 张安宁
Owner 北京量子体系科技股份有限公司
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