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Self-collimating high-stability entanglement source module and system

An entanglement source and high stability technology, which is applied in the fields of laser technology, nonlinear optical physics technology, quantum optics and quantum communication, can solve the problems such as the great influence of visible light entanglement sources, and achieve phase stability, consistent optical paths, and spatial and the effect of high phase stability

Active Publication Date: 2018-08-28
安徽鲲鹏量子科研装备有限公司
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Problems solved by technology

In the satellite-to-earth free space quantum communication system, visible light entanglement sources are currently used. However, visible light entanglement sources are greatly affected by sunlight and cannot work during the day and at night with moonlight. Therefore, entangled photon pairs in the infrared communication band are needed. Realize all-weather satellite-ground quantum communication system

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  • Self-collimating high-stability entanglement source module and system
  • Self-collimating high-stability entanglement source module and system
  • Self-collimating high-stability entanglement source module and system

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Embodiment Construction

[0033] like figure 1 As shown, a self-collimation highly stable entanglement source module, including 780nm and 1560nm dichromatic polarization beam splitter DPBS, 780nm and 1560nm dichromatic half-wave plate DHWP, first plane mirror M1, 780nm and 1560nm The first concave reflector CM1 and the second flat mirror M2 of the second concave reflector CM2, 780nm and 1560nm fully reflective, the optical path between the first concave reflector CM1 and the second concave reflector CM2 is provided with periodic A polarized crystal, the periodically polarized crystal is a PPKTP crystal. The radius of curvature of the first concave mirror CM1 and the second concave mirror CM2 is 150nm.

[0034] A temperature control furnace 2 is arranged outside the periodically polarized crystal, the temperature control range is 15 to 70 degrees Celsius, and the temperature control accuracy is 2mK.

[0035]The dichromatic polarization beam splitter DPBS is used to split the pump light into two circul...

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Abstract

The invention discloses a self-collimating high-stability entanglement source module and a system thereof, comprising a dual-color polarization beam splitter DPBS, a two-color half-wave plate DHWP, afirst plane mirror M1, a second concave mirror CM2, a first concave mirror CM1 and a second plane mirror M2 which are sequentially arranged and form an optical loop, wherein a periodically polarized crystal is disposed on the optical path between the first concave mirror CM1 and the second concave mirror CM2. An advantage of the invention is that both the focusing of the pump beam and the collimation of the generated spontaneous parametric down-converting photons can be achieved by using the first concave mirror and the second concave mirror. The focusing lens of the pumping light and the fiber collimator required for photon collection may be omitted, which greatly simplifies the complexity of the optical path, and highly integrates and miniaturizes the entangled source module.

Description

technical field [0001] The invention relates to the fields of laser technology, nonlinear optical physics technology, quantum optics and quantum communication technology, in particular to a self-collimation highly stable entanglement source module and system. Background technique [0002] Long-distance quantum communication is mainly based on optical fiber systems and free space. The low-loss window of optical fiber systems is in the 1550nm band. Therefore, to realize long-distance quantum teleportation and quantum entanglement exchange in optical fiber systems, it is necessary to prepare high-brightness, high-quality, highly integrated Quantum entanglement source system. In the satellite-to-earth free space quantum communication system, visible light entanglement sources are currently used. However, visible light entanglement sources are greatly affected by sunlight and cannot work during the day and at night with moonlight. Therefore, entangled photon pairs in the infrared...

Claims

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Application Information

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IPC IPC(8): H01S3/094H01S3/10H01S3/108H01S3/109
CPCH01S3/094049H01S3/10023H01S3/10061H01S3/1083H01S3/109
Inventor 吴龚敏
Owner 安徽鲲鹏量子科研装备有限公司
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