Atomic gas concentration detection device and method based on optical coherent backscattering effect

Abstract

The invention discloses an atom gas concentration detecting apparatus and a method based on optical coherent backscattering effect. The atom gas concentration detecting apparatus comprises a laser aligner (1), a Glan-Taylor prism (2), a reflector (3), a depolarizing splitting prism (4), a sample beach (5), a Fourier lens (6), a polarization analyzer (7), a detector (8) and a computer (9); the laser aligner (1), the Glan-Taylor prism (2) and the reflector (3) are successively arranged on one same straight line along the transverse direction; the reflector (3) and depolarizing splitting prism (4) are arranged on one same straight line along the vertical direction; the sample beach (5) is arranged at one side of the depolarizing splitting prism (4), and the other side of the depolarizing splitting prism (4) is provided with the Fourier lens (6), the polarization analyzer (7) and the detector (8); the detector (8) is electrically connected with the computer (9) via data lines; and the detector (8) is arranged on the focal plane of the Fourier lens (6). The atom gas concentration detecting apparatus and the method help to realize nondestructive test on atom concentration of the atom gas in an enclosed gas room.

Description

technical field

[0001] The invention relates to the technical field of atomic gas detection, in particular to an atomic gas concentration detection device and method based on optical coherent backscattering effect. Background technique

[0002] Atomic gas is the most basic and important type of basic substance in today's scientific research and industrial production. It plays an irreplaceable role in many fields such as condensed matter physics, optoelectronic technology, and time-frequency measurement. One of the most important applications of atomic gases is as a working substance for the physics part of atomic frequency standards.

[0003] The atomic frequency standard is a time-frequency measurement technology based on atomic energy level transitions, and is currently the most accurate time-frequency measurement benchmark. Nowadays, the most widely used working substances in the physics part of atomic frequency standards are based on atomic gases such as hydrogen, rubid...

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