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Device and method for generating multi-frequency point two-component entangled light field with continuous wave laser

A multi-frequency, entangled light technology, applied in optics, nonlinear optics, instruments, etc., can solve the problems of quantum communication and quantum information channels, such as small number of channels, small channel capacity, and difficulty in generating quantum information networks.

Active Publication Date: 2017-12-05
太原市和信无双科技有限责任公司
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Problems solved by technology

The entanglement of a single frequency point will result in a small number of quantum communication and quantum information channels, and the channel capacity is small
Multicolor and multicomponent entanglement will be limited by low-loss optical fibers in practical long-distance transmission, and its quantity is difficult to produce practical quantum information networks

Method used

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  • Device and method for generating multi-frequency point two-component entangled light field with continuous wave laser
  • Device and method for generating multi-frequency point two-component entangled light field with continuous wave laser
  • Device and method for generating multi-frequency point two-component entangled light field with continuous wave laser

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Embodiment Construction

[0050] The second-order nonlinear crystal 2 and the output coupling lens 3 are both installed on a fine control translation stage. This makes it easy to adjust the movement of the two to achieve the output of light fields at multiple frequency points.

[0051] The optical cavity length is 3cm-6cm, that is, the cavity length can be realized by the movement of the electronically controlled output coupling lens 3, and the range is 0-30mm. The length of the second-order nonlinear crystal in the cavity is 2±0.2cm, and the crystal can be controlled by the electronically controlled translation stage. Move 1.5cm, and its position should match the output coupling lens 3.

[0052] The number of entanglement frequency points of the two-component entangled light field generated by the continuous wave laser after passing through the "multi-frequency entanglement generator" depends on the phase matching bandwidth of the crystal and the free spectral region of the multi-frequency entanglement gen...

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Abstract

The quantum entangled state light field is an important resource for quantum precision measurement and quantum information research, is widely used in many fields of quantum information, and is of important value in the aspects of quantum key distribution, quantum communication network, quantum cryptography communication, quantum teleportation, quantum computing and the like. Currently, experimental schemes for generating the entangled state light field are mostly at a single frequency, or are the study of multi-component multi-color entanglement, and relate to the multi-optical-frequency entangled light field. The invention provides a device and method for generating the multi-frequency-point two-component entangled light field through continuous wave laser. Apart from being capable of generating entanglement at a zero frequency, the two-component entanglement can also have many frequency points simultaneously for quantum entanglement properties at a high frequency, and in this way, the maximally entangled state can be obtained. The device and method for generating the multi-frequency-point two-component entangled light field through continuous wave laser have the advantages of unique quantum property multi-channel, high efficiency, high channel capacity and the like, and will be one of the most important 'resources' in the field of quantum information.

Description

Technical field [0001] The invention relates to the field of squeezed and entangled light fields, in particular to a device and method for generating a two-component entangled light field with multiple frequency points using a continuous wave laser. Background technique [0002] Quantum entangled state light field is an important resource for quantum precision measurement and quantum information research. It has a wide range of applications in many quantum information fields, such as quantum key distribution, preparation of continuous variable multi-component entangled state light field, quantum communication network , Quantum cryptographic communication, quantum teleportation and quantum computing have very important value. The current experimental schemes for generating entangled light fields are mostly at a single frequency band, that is, only centering on the optical frequency and entanglement within the cavity bandwidth, or studying the entanglement of multiple components an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/35
CPCG02F1/3501G02F1/3503
Inventor 杨荣国王晶静张静
Owner 太原市和信无双科技有限责任公司
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