Device and method for continuously measuring arrival time of photon sequence

Abstract

The invention relates to a device and a method for continuously measuring the arrival time of a photon sequence. The device comprises a single photon detector, a preamplifier, a constant ratio discriminator, an atomic clock, a counter, a time-to-digital converter, a controller, a memory unit and a computer, wherein the output end of the constant ratio discriminator is connected with the controller; a square-wave pulse output by the atomic clock is used as a counting object of the counter and is transmitted into the time-to-digital converter; the rising edge of the square-wave pulse is used as a start signal of the time-to-digital converter, and the rising edge of a digital pulse signal is used as a stop signal of the time-to-digital converter; and the control end of the controller is respectively connected with the counter, a digit converter and the memory unit and used for controlling the synchronous storage of rough measuring time and fine measuring time into the memory unit. The invention solves the technical problems of continuous measurement incapability, narrow measurement range and limited application range of a traditional photon sequence arrival time measuring device, and the device has a wide measurement range and high accuracy in measuring the photon arrival time.

Description

technical field [0001] The invention proposes a method for measuring the arrival time of a photon sequence, which relates to the fields of single photon detection technology, time-correlated single photon counting technology, time measurement technology and the like. Background technique [0002] The measurement of photon sequence arrival time not only has important applications in basic research fields such as quantum optics, quantum imaging, pulsar navigation, and high-energy physics, but also has extremely wide applications in application fields such as deep space exploration, laser ranging, and fluorescence lifetime measurement. [0003] The currently reported technique for measuring the arrival time of multiple photons is time-correlated single photon counting (TCSPC). The principle is that when recording low-intensity, periodic light pulse signals, when the detected When a photon is detected, the arrival time of the photon in the optical pulse signal period is recorded...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems that the existing photon sequence arrival time measurement device cannot continuously measure, the measurement range is narrow, and the application range is limited, the present invention proposes a photon sequence arrival time continuous measurement device and method for the existing technical problems, specifically The solution is as follows:

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