Cold atom number detecting device

Abstract

The invention discloses a cold atom number detecting device. The cold atom number detecting device comprises a first detector, a second planoconvex lens, a first planoconvex lens, a third planoconvex lens, a fourth planoconvex lens, a second detector, a reflector, an adapting light barrel, an optical slit, a beam-expanding light barrel, a beam expanding lens, a quarter wave plate, a first polarization beam splitter, a half wave plate, a second polarization beam splitter and a detecting chamber; the cold atom number detecting device is simple in structure and convenient to operate and can realize three-dimensional adjustment of the position of the detector, and therefore, the cold atom number detecting device facilitates detection of cold atomic fluorescence signals; the cold atom number detecting device is designed modularly, can be conveniently used for the cold atom number detection of different detection systems, the cold atom number detecting device adopts heavy-caliber and short-focal-length lens combination for bi-directional detection, the fluorescence collecting efficiency is high and the signal to noise ratio is increased.

Description

technical field [0001] The invention relates to a cold atomic number detection device, which belongs to the technical field of atomic optical detection. Background technique [0002] In the past 30 years, with the development of laser cooling and trapping atom technology, based on three-dimensional magneto-optical trap technology, cold atomic groups can be captured and trapped directly from neutral atom vapor, and then low-speed and high-flux cold atom beams. Compared with the hot atomic beam, the cold atomic beam has a smaller speed, and its corresponding De Broglie wavelength is larger, and can obtain greater sensitivity in atomic interference. Therefore, the cold atomic beam can be used in atomic frequency standard, precision measurement, inertial Navigation and Bose-Einstein condensation and other fields have been widely used. [0003] When a beam of laser light with a frequency resonant with the atomic transition is irradiated in the vertical direction of the propagat...

AI Technical Summary

Problems solved by technology

Due to the large number of lenses, the entire optical path structure is more complicated and difficult to adjust, and a part of the fluorescence will be lost after passing through multiple lenses, which will reduce the signal-to-noise ratio of the signal collected by the detector.

In addition, the position of the detector is usually fixed or cannot be adjusted in multiple dimensions, making it difficult to find the position with the strongest fluorescence, which reduces the detection accuracy

Images