An atomic sensor system for measuring electric field strength and a method for measuring electric field strength

Abstract

The present invention relates to an atom sensor system for measuring electric field intensity and an electric field intensity measurement method. The method mainly comprises the following steps: a red detection laser and a blue coupling laser passes through a laser filter to enter a laser expanding device to perform expansion of the wave beam shape; the expanded red detection laser enters an atom steam chamber to perform irradiation stimulation of the atoms, and the expanded blue coupling laser enters the atom steam chamber perform irradiation of the atoms under the red detection laser simulation; a spectrum detector measures the intensity of the red detection laser signals penetrating the atom steam chamber and obtains the transmitted spectrum according to the red detection laser sweep frequency; and a lock-in amplifier amplifies the transmitted spectrum electric signals outputted by the spectrum detector and outputs the transmitted spectrum electric signals to a terminal, and the terminal displays the red detection laser transmitted spectrum graph and calculates the electric field intensity through the transmitted spectrum graph. The atom sensor system for measuring electric field intensity and the electric field intensity measurement method add the laser filtering and beam expanding links to allow the flexibility of the atom sensor system measuring the electric field intensity to be higher.

Description

Technical field [0001] The invention relates to the field of electric field intensity measurement, in particular to an atomic sensor system for measuring electric field intensity and a method for measuring electric field intensity. Background technique [0002] The core of the existing atom sensor system for measuring the electric field intensity is the atoms in the overlapping part of the red detection laser and the blue coupling laser in the atomic vapor cavity. The atoms in the overlapping part are excited by the red detection laser and the blue coupling laser and are sensitive to electric field radiation. It is used for the measurement of electric field intensity; the other part of the atomic vapor in the atomic vapor cavity is not excited by the red detection laser and blue coupling laser, so it is not sensitive to electric field radiation and does not participate in the electric field intensity measurement. [0003] Since the detection laser is red light and the coupling lase...

AI Technical Summary

Problems solved by technology

[0003] Since the detection laser is red light and the coupling laser is blue light, and the beam diameter of blue light is generally smaller than that of red light, the diameter of the overlapping part of the red light detection laser and the blue light coupling laser is the diameter of the blue light coupling laser, and the red light detection laser and the blue light coupling laser The non-overlapping part does not participate in the electromagnetic induction transparency, which leads to the decrease of the electromagnetic induction transmission peak value of the red detection laser, so that the ratio of the electromagnetic induction transmission peak value of the red detection laser to the transmission spectrum after the red detection laser directly penetrates the atomic vapor decreases, that is, the signal-to-noise Ratio decreases, leading to a decrease in the sensitivity of existing electric field atomic sensor systems

Images