CN215341045U

CN215341045U - Quantum random number generator

Info

Publication number: CN215341045U
Application number: CN202122870200.0U
Authority: CN
Inventors: 王其兵; 王林松; 陈柳平; 王雅琦
Original assignee: Guangdong Qike Quantum Information Technology Research Institute Co ltd; Guokaike Quantum Technology Beijing Co Ltd
Current assignee: Guangdong Qike Quantum Information Technology Research Institute Co ltd; Guokaike Quantum Technology Beijing Co Ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2021-12-28
Anticipated expiration: 2031-11-23

Abstract

The present invention provides a quantum random number generator comprising: a substrate; a light source disposed on the substrate; a photodetection pixel array including a plurality of photodetection elements disposed on a circumference on the substrate centered on a center of the light source; a diffuse reflector disposed above the light source and the plurality of photodetecting elements to reflect photons emitted by the light source to the plurality of photodetecting elements; and a processor electrically connected to the plurality of photodetecting elements to generate a quantum random number sequence from photons received by the plurality of photodetecting elements. The quantum random number generator provided by the utility model not only can reduce the complexity of light intensity adjustment of each photoelectric detection element in the photoelectric detection pixel array in the quantum random number generator, but also can reduce the number of light sources used for the photoelectric detection pixel array.

Description

Quantum random number generator

Technical Field

The utility model relates to the technical field of electric digital data processing, in particular to a quantum random number generator.

Background

At present, a quantum random number generator as shown in fig. 1 and 2 is generally employed to generate a random number sequence required by a system (such as, but not limited to, a quantum key distribution system), in which photodetection elements are generally arranged in a matrix array, and light sources are disposed all around a photodetection pixel array. Since the distances between the light source and each of the photodetecting elements in the photodetecting pixel array are different, it is difficult to ensure that the intensities of light received by each of the photodetecting elements in the photodetecting pixel array from the light source are uniform using the device arrangement as shown in fig. 1 and 2, which increases the complexity of light intensity adjustment for each of the photodetecting elements in the photodetecting pixel array.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to provide a quantum random number generator.

According to an aspect of the present invention, there is provided a quantum random number generator, the apparatus comprising: a substrate; a light source disposed on the substrate; a photodetection pixel array including a plurality of photodetection elements disposed on a circumference on the substrate centered on a center of the light source; a diffuse reflector disposed above the light source and the plurality of photodetecting elements to reflect photons emitted by the light source to the plurality of photodetecting elements; and a processor electrically connected to the plurality of photodetecting elements to generate a quantum random number sequence from photons received by the plurality of photodetecting elements.

Preferably, the photodetecting element includes: a photodetector for receiving the photons reflected by the diffuse reflector and converting the received photons into electrical pulse signals; an analog amplifier for amplifying the electrical pulse signal; and an analog-to-digital converter for converting the amplified electrical pulse signal into a digital signal.

Preferably, the processor generates a quantum random number sequence from the digital signal.

Preferably, the light source is an LED light emitting diode.

Preferably, the photodetector is a CMOS photodiode or a PD photodiode.

The quantum random number generator provided by the utility model not only can reduce the complexity of light intensity adjustment of each photoelectric detection element in the photoelectric detection pixel array in the quantum random number generator, but also can reduce the number of light sources used for the photoelectric detection pixel array, thereby reducing the cost of the quantum random number generator to a certain extent.

Drawings

The above objects and features of the present invention will become more apparent from the following description when taken in conjunction with the accompanying drawings.

Fig. 1 shows a schematic diagram of a top view of a quantum random number generator in the related art.

Fig. 2 is a schematic diagram showing a front view of a quantum random number generator in the related art.

Fig. 3 shows a schematic diagram of a top view of the quantum random number generator of the present invention.

Fig. 4 shows a schematic diagram of a front view of a quantum random number generator of the present invention.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 3 and 4, the quantum random number generator of the present invention may include at least a substrate 101, a light source 102 (such as, but not limited to, an LED light emitting diode, etc.), a photodetection pixel array 103, a diffuse reflector 104, and a processor (not shown).

In the quantum random number generator shown in fig. 3 and 4, the light source 102 may be disposed on the substrate 101; the photodetection pixel array 103 may include a plurality of photodetection elements, which may be disposed on a circumference on the substrate 101 centered on the center of the light source 102; a diffuse reflector 104 may be disposed over the light source 101 and the plurality of photo-detection elements to reflect photons emitted by the light source 102 to the plurality of photo-detection elements; the processor may be electrically connected to the plurality of photodetecting elements to generate a sequence of quantum random numbers from photons received by the plurality of photodetecting elements. With this arrangement of components, the distance between the light source in the quantum random number generator and each of the photodetecting elements in the photodetecting pixel array can be kept consistent as a whole, thereby ensuring that the light intensity received by each of the photodetecting elements in the photodetecting pixel array from the light source is kept consistent as a whole. This may reduce the complexity of the light intensity adjustment for each photodetector element in the photodetector pixel array in the quantum random number generator to some extent. In addition, with this component arrangement, the number of light sources used for the photodetection pixel array can also be reduced, and therefore, the cost of the quantum random number generator can be further reduced.

In the quantum random number generator shown in fig. 3 and 4, the photo-detection elements may include a photo-detector (such as, but not limited to, a CMOS photodiode or a PD photodiode), an analog amplifier, and an analog-to-digital converter (not shown), wherein the photo-detector may receive photons reflected by the diffuse reflector 104 and convert the received photons into electrical pulse signals; the analog amplifier can amplify the electric pulse signal; the analog-to-digital converter may convert the amplified electrical pulse signal to a digital signal. Accordingly, the processor may generate a quantum random number sequence from the digital signal.

The quantum random number generator provided by the utility model not only can reduce the complexity of light intensity adjustment of each photoelectric detection element in the photoelectric detection pixel array in the quantum random number generator to a certain extent, but also can reduce the number of light sources used for the photoelectric detection pixel array, thereby further reducing the cost of the quantum random number generator.

While the present application has been shown and described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made to these embodiments without departing from the spirit and scope of the present application as defined by the following claims.

Claims

1. A quantum random number generator, comprising:

a substrate;

a light source disposed on the substrate;

a photodetection pixel array including a plurality of photodetection elements disposed on a circumference on the substrate centered on a center of the light source;

a diffuse reflector disposed above the light source and the plurality of photodetecting elements to reflect photons emitted by the light source to the plurality of photodetecting elements; and

a processor electrically connected to the plurality of photodetecting elements to generate a sequence of quantum random numbers from photons received by the plurality of photodetecting elements.

2. The quantum random number generator of claim 1, wherein the photodetecting element comprises:

a photodetector for receiving the photons reflected by the diffuse reflector and converting the received photons into electrical pulse signals;

an analog amplifier for amplifying the electrical pulse signal; and

and the analog-to-digital converter is used for converting the amplified electric pulse signals into digital signals.

3. The quantum random number generator of claim 2, wherein the processor generates a quantum random number sequence from the digital signal.

4. The quantum random number generator of claim 1, wherein the light source is an LED light emitting diode.

5. The quantum random number generator of claim 2, wherein the photodetector is a CMOS photodiode or a PD photodiode.