Infrared single photon detection apparatus

A single-photon detection and single-photon technology, applied in the field of extremely weak light detection, can solve the problem of low practicality, and achieve the effect of improving practicality, high conversion efficiency and effective aggregation

Inactive Publication Date: 2017-06-13
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0007] The purpose of the embodiments of the present invention is to provide an infrared single-photon detection device to perform infrared single-photon detection through a device with a smaller volume, thereby solving the problem of low practicability in the prior art

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Embodiment Construction

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] In order to solve the problem of low practicability in the prior art, an embodiment of the present invention provides an infrared single-photon detection device, which will be described in detail below.

[0024] Such as figure 2 As shown, an infrared single photon detection device provided by an embodiment of the present invention includes: a nonlinear photonic crystal waveguide 1 , a filter 2 and a visible light single photon counting module 3 . Amon...

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Abstract

The embodiment of the invention provides an infrared single photon detection apparatus comprising a nonlinear photonic crystal waveguide, a filter, and a visible light single photon counting module, wherein the nonlinear photonic crystal waveguide and the filter are integrated into a single chip; the nonlinear photonic crystal waveguide is used to up-convert an infrared single photon signal into a visible light single photon signal. The filter is used for filtering the noise in the visible light single photon signal. The visible single photon counting module is used for detecting the visible light single photons of the filtered visible light single photon signal. The low practicability in the prior art can be solved by carrying out infrared single photon detection by means of the infrared single photon detection apparatus having a smaller volume.

Description

technical field [0001] The invention relates to the technical field of extremely weak light detection, in particular to an infrared single photon detection device. Background technique [0002] Photon has become the most suitable carrier of quantum information because of its fast flight speed and small coupling effect with the environment. Therefore, in the field of quantum optical quantum information, it is urgent to realize the sensitive detection and manipulation of single photon. And single-photon detection is an extremely weak light detection method, the current intensity of the light it detects is higher than the thermal noise level of the photodetector itself at room temperature (10 -14 W) is even lower, and the signal buried in the noise cannot be extracted by the usual DC detection method. [0003] Among them, infrared single-photon detection technology has both the universality of civil technology and the particularity of national defense technology. It has many p...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J11/00
CPCG01J11/00
Inventor 余建国李依桐李嘉恒祝托
Owner BEIJING UNIV OF POSTS & TELECOMM
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