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Miniaturized entanglement source system for multimode receiver based on bbo crystal

An entanglement source and crystal technology, applied in the field of quantum information, can solve the problem that the quantum entanglement source system cannot obtain satisfactory polarization contrast and brightness.

Active Publication Date: 2021-07-30
JINAN INST OF QUANTUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the quantum entanglement source system using this scheme still cannot obtain satisfactory polarization contrast and brightness

Method used

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  • Miniaturized entanglement source system for multimode receiver based on bbo crystal
  • Miniaturized entanglement source system for multimode receiver based on bbo crystal
  • Miniaturized entanglement source system for multimode receiver based on bbo crystal

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Embodiment Construction

[0039] Hereinafter, an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings. The following examples are provided in a manner in order to sufficiently convey the spirit of the invention to those skilled in the art of the present invention. Therefore, the present invention is not limited to the embodiments disclosed herein.

[0040] Figure 4Shows a schematic structure of an example of entanglement system of the present invention.

[0041] As shown, the system may include entanglement pump light source 1, a pump light transmission module, entanglement apparatus 5, the light separating means 7, a first collection means 8-1 and 8-2 the second collecting device.

[0042] A pump light source may be arranged to output polarized light, which for example may be achieved by means of a pump laser. In one example, the pump light source may include a pump laser wavelength of 405nm.

[0043] Polarized light by the pumping light ou...

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Abstract

The invention discloses a BBO crystal-based multi-mode receiving miniaturized entanglement source system, which includes a pumping light source 1, a pumping light transmission module, an entanglement device 5, an optical separation device 7, a first collection device 8-1 and a second 2. Collecting device 8-2. Wherein, the first collecting device 8-1 and the second collecting device 8-2 are asymmetrical in structure. The first collecting device 8-1 includes a first multimode optical fiber, a temporal filtering unit 9 and a spatial filtering unit 11, and the temporal filtering unit 9 is located in front of the spatial filtering unit 11. The second collecting device 8-2 includes a spatial filtering unit 12 and a second multimode optical fiber. With the help of the invention, entangled light with high polarization contrast, high brightness and quality can be stably provided with a simplified structure.

Description

Technical field [0001] The present invention relates to the field of quantum information, and more particularly to a multimode reception miniaturized entanglement source system based on BBO crystals. Background technique [0002] The concept of quantum entanglement was earliered by Schrödinger and the famous EPR. It is a research hotspot in recent years physics and information communication. The special nature of quantum entanglement makes it a significant application value in quantum calculations, quantum secure communication, quantum invisible pathways. To date, entanglement states can be generated in the cavity qed, ion trap, quantum point, etc., but the entanglement state based on the optical system is most likely to achieve high rate and high brightness, thereby being widely used. [0003] So far, the transfer (SPDC) process in nonlinear crystals is used to generate entangled photon pairs to be the most mature method, for example, see China Patent Document CN201721027813.5 a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/355G02F1/35G02F1/39
CPCG02F1/3501G02F1/3551G02F1/39
Inventor 周飞张亚楠
Owner JINAN INST OF QUANTUM TECH