Device for generating sub-kHz low-frequency intensity difference compression based on cesium atom ensemble

An atomic ensemble and low-intensity technology, applied in laser monitoring devices, phonon exciters, laser components, etc., can solve the problems of bulky and expensive, and achieve stable system performance, easy operation, and compact device structure Effect

Active Publication Date: 2018-05-08
SHANXI UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems of high price and bulky existing low-frequency compressed s

Method used

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  • Device for generating sub-kHz low-frequency intensity difference compression based on cesium atom ensemble
  • Device for generating sub-kHz low-frequency intensity difference compression based on cesium atom ensemble
  • Device for generating sub-kHz low-frequency intensity difference compression based on cesium atom ensemble

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Example Embodiment

[0029] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0030] Such as figure 1 As shown, a device for generating sub-kHz low-frequency intensity difference compression based on the cesium atom ensemble in this embodiment includes a semiconductor laser 1, a single-mode fiber 2, a first mirror 31, a second mirror 32, and a third Mirror 33, optical beam splitter 4, electro-optic modulator 5, Fabry-Perot etalon group 6, first lens group 71, second lens group 72, first half-wave plate 81, second half-wave plate 82. Glan laser prism 9, cesium atomic cell 10, Glan Thomson prism 11, beam collector 12, first photodetector 141, second photodetector 142, subtractor 15 and spectrum analyzer 16; The semiconductor laser 1 is placed on the surface of an independent, heat-insulated platform, and a heat-insulating cover is added to isolate the semiconductor laser and the platform from the external environment;

[0031] One end of th...

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Abstract

The invention relates to a device for generating sub-kHz low-frequency intensity difference compression based on a cesium atom ensemble and mainly aims at solving the technical problems of high priceand large volume of an existing low-frequency compression state device. According to the technical scheme, the device for generating the sub-kHz low-frequency intensity difference compression based onthe cesium atom ensemble comprises a semiconductor laser, a single-mode optical fiber, reflectors, an optical beam splitter, an electrooptical modulator, a fabry-perot etalon group, lens assemblies,half-wave plates, a Glan laser prism, a cesium atom pool, a Glan-Thomson prism, a beam collector, a high-frequency signal generator, photoelectric detectors, a subtracter and a spectrum analyzer, wherein the semiconductor laser is arranged on the surface of an independent heat insulation platform; and a heat insulation cover covers to isolate the semiconductor laser and the platform from the external environment. According to the device, the low-frequency intensity difference compression of which the maximum compressibility is 6dB-1kHz can be obtained, the device is stable in performance and compact in structure and commercial production can be achieved.

Description

technical field [0001] The invention relates to a device for generating sub-kHz low-frequency intensity difference compression based on an ensemble of cesium atoms, which belongs to the technical fields of quantum imaging and quantum precision measurement. Background technique [0002] Squeezed light field, as a nonclassical light field, has been widely used in the fields of quantum precision measurement and quantum imaging. There are many ways to generate squeezed light fields, including the use of optical parametric oscillators with built-in nonlinear crystals, four-wave mixing processes in atomic ensembles of alkali metals, the Kerr effect in optical fibers, and laser diodes with intensity feedback, etc. . Using the non-degenerate four-wave mixing process in alkali metal atoms to generate a double-mode squeezed state light field, its frequency corresponds to the transition energy level of the atom, so it can be applied to quantum state storage and quantum communication b...

Claims

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Application Information

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IPC IPC(8): H01S3/0941H01S3/22H01S3/00
CPCH01S3/0014H01S3/0941H01S3/22
Inventor 秦忠忠马荣刘伟贾晓军郜江瑞
Owner SHANXI UNIV
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