Single photon counting device and method

Abstract

The invention discloses a single photon counting device and method, wherein the device comprises a photon detection unit, a data processing unit and a parallel counting module; the photon detection unit is used for receiving laser and generating an electric pulse signal; the data processing unit is used for receiving the electric pulse signal and outputting a counting signal, wherein the data processing unit comprises a serial-parallel conversion module and a parallel counting module, under the condition that the data processing unit receives the electric pulse signal, and the serial-parallel conversion module converts the electric pulse signal into parallel data; and the parallel counting module collects the number of pulses contained in the parallel data and performs statistical counting to generate the counting signal. By introducing the serial-parallel conversion module, the time test precision is multiplied according to the serial-parallel conversion proportion, the counting precision is effectively improved, the circuit used by the data processing unit is completely digitalized, and the reliability of the counting device is ensured.

Description

technical field [0001] The invention relates to the technical field of communication testing, in particular to a single photon counting device and a method thereof. Background technique [0002] In traditional test systems and sensing systems, some random variables are usually converted into electrical signal pulses, and then the operation law or distribution form of physical quantities is reproduced through detection, positioning, and statistical pulse signals. Therefore, the pulse counters used in the above systems Positioning accuracy and counting accuracy determine the test system accuracy. Traditional pulse counters usually use a frequency-stabilized crystal oscillator as a reference clock. Since the oscillator frequency and logic circuit response frequency are in the hundreds of MHz, the time accuracy of this type of counter is on the order of several ns, and the positioning accuracy is limited, which cannot meet High-precision testing requirements. [0003] Therefor...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a single photon counting device. By introducing a high-speed serial-to-parallel converter, the time test accuracy is doubled according to the serial-to-parallel conversion ratio, effectively improving the counting accuracy, and making the circuit used by the data processing unit completely Digitalization ensures the reliability of the counting device and solves the problems of low counting accuracy and poor reliability of the traditional pulse counting device

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