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Device and method for extracting vacuum side mold

A side mold and vacuum technology, applied in the field of optics, can solve problems such as the inability to extract signals, and achieve the effect of convenient operation and simple device

Active Publication Date: 2021-07-30
SHANXI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the signal required for any sideband mode resonance cannot be extracted in an active and stable manner. Experimentally, the required signal mode is limited to be extracted and locked to the filter cavity to achieve resonance output.

Method used

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  • Device and method for extracting vacuum side mold
  • Device and method for extracting vacuum side mold
  • Device and method for extracting vacuum side mold

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Embodiment Construction

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The following embodiments are used to illustrate the present invention, but not to limit the protection scope of the present invention.

[0025] combine figure 1 , to further illustrate the specific implementation of a device and method for extracting vacuum side molds of the present invention. The idea of ​​the present invention is based on the principle that the resonant frequency of the filter cavity is degenerate, so that the modulated sideband of the auxiliary light and the measured side-mode frequency of the squeezed state light field differ by one free spectral region of the filter cavity, and the resonance output in the filter cavity , the extraction and measurement of vacuum side molds can be realized.

[0026] figure 1 Be the e...

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Abstract

The invention belongs to the technical field of optics, and particularly relates to a device and a method for extracting a vacuum side mode. A beam of coherent auxiliary light and a compressed light field side mode are used for beat frequency, the frequency of the auxiliary light is adjusted to be different from the sideband frequency by a free spectral region of a filter cavity, the filter cavity is locked to the auxiliary light frequency through a PDH technology. Because the resonant frequency of the cavity is degenerate, the sideband of the compressed light can also resonate with the filtering cavity to realize resonant output. The frequency of the side mode obtained by the method is different from that of the auxiliary light, so that the auxiliary light does not interfere with the sideband of the compressed light field, additional classical noise of coherent light is not introduced, and the output compressed light field side mode is still in a vacuum mode, namely, a pure vacuum side mode is obtained. The method is simple in device and convenient to operate, no extra phase noise is introduced, the vacuum side mode can be locked to the filtering cavity to extract the needed sideband, and the vacuum side mode is obtained for subsequent detection.

Description

technical field [0001] The invention belongs to the field of optical technology, and relates to a device and a method for extracting vacuum side molds. Background technique [0002] Squeezed light field is a very important non-classical light field, which can be applied in research fields such as gravitational wave detection, optical precision measurement, generation of entangled light field, and quantum communication. Especially in quantum communication, two single-mode squeezed light fields or a double-mode squeezed light field can be used to generate entangled light. As the basis and core of quantum information, entangled light can complete quantum entanglement exchange and quantum transmission of ultra-weak information. Important principle experiments in the field of quantum communication, such as quantum secure communication, quantum dense coding and quantum state transfer. Therefore, it is of great significance to prepare and accurately measure the squeezed light fiel...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/00
CPCG02B27/00Y02E30/10
Inventor 王雅君武奕淼郑耀辉田龙
Owner SHANXI UNIV