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Device and method for automatically adjusting classical gain in continuously variable quantum entanglement source

A quantum entanglement and automatic adjustment technology, applied in nonlinear optics, instruments, optics, etc., can solve problems such as restricting continuous variable quantum entanglement sources, and achieve the effect of solving ease of operation

Active Publication Date: 2015-07-29
北京欧屹科技有限公司
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Problems solved by technology

Restricting the continuous variable quantum entanglement source from the laboratory to a stable and reliable product

Method used

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  • Device and method for automatically adjusting classical gain in continuously variable quantum entanglement source
  • Device and method for automatically adjusting classical gain in continuously variable quantum entanglement source
  • Device and method for automatically adjusting classical gain in continuously variable quantum entanglement source

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Embodiment Construction

[0026] A device for automatically adjusting the classical gain in a continuously variable source of quantum entanglement, as figure 1 As shown, the optical parametric amplifier 1 is composed of an optical parametric amplifier input mirror 11 and an optical parametric amplifier output mirror 13, both of which are plano-concave mirrors with a curvature radius of 50 mm. The concave surface of the optical parametric amplifier input mirror 11 is coated with a 1080nm high-reflection and 540nm high-transparency film. The concave surface of the optical parametric amplifier output mirror 13 is highly reflective at 540nm, and the reflectivity to 1080nm light is 95%. A nonlinear crystal 12 with adjustable working temperature and a temperature control furnace 18 are placed in the optical parametric amplifier 1 . The nonlinear crystal is a type II non-critical phase-matched KTP crystal. Both end faces are double anti-reflection for 1080nm and 540nm. The size is 3×3×10mm, and the phase mat...

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Abstract

The invention provides a device and a method for automatically adjusting classical gain in a continuous variable quantum entanglement source. The device comprises an optical parameter amplifier, a photoelectric detector, a central processing unit and a temperature controller, wherein a working temperature adjustable nonlinear crystal is placed in the optical parameter amplifier; the photoelectric detector converts an optical signal transmitted by the optical parameter amplifier to an electrical signal; the electrical signal is input to the central processing unit by an analog / digital converter; a signal output by the central processing unit is input to the temperature controller by a digital / analog converter; the temperature of the nonlinear crystal is controlled by the temperature controller; and the method for automatically adjusting the classical gain comprises the steps that the photoelectric detector monitors a transmission signal of the optical parameter amplifier, and the working temperature of the nonlinear crystal is adjusted by a detection result, so that a peak-peak value of the transmission signal is maximum, that is the classical gain is maximum. The device solves the problem that the existing continuous variable quantum entanglement source is difficult to operate, and lays a foundation for the device from a laboratory to a market.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to a device and method for automatically adjusting classical gain in a continuous variable quantum entanglement source. Background technique [0002] Quantum informatics is an emerging interdisciplinary subject formed by the combination of information science and quantum mechanics, mainly including quantum computing and quantum communication. Quantum communication mainly includes quantum teleportation, quantum cryptography and quantum dense coding. Due to the unique nature of quantum entanglement sources, quantum information has the ability to break through the limits of existing classical information systems in terms of increasing computing speed, ensuring information security, increasing information capacity, and improving detection accuracy. [0003] The source of quantum entanglement is the core of quantum communication and quantum computing. The most important key and ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/39G02F1/35
Inventor 郑耀辉王文哲王雅君周海军彭堃墀
Owner 北京欧屹科技有限公司
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