High resolution imaging device used for cold atom system

Abstract

The invention discloses a high resolution imaging device used for a cold atom system. The device comprises a disordered optical lattice generation path and an imaging light path, and is characterized in that the disordered optical lattice generation path comprises a laser beam and is composed of a first lens, a second lens, a diffusion barrier, a reflection mirror and a dichroic mirror along the laser beam direction in sequence; the first lens and the second lens form a beam expanding system; the reflection mirror and the dichroic mirror are in 45 degrees with the beam direction; the imaging light path comprises an imaging lighting beam and is composed of a vacuum pool, a third lens, a dichroic mirror, a fourth lens and a CCD (Charge Coupled Device) along the imaging lighting direction in sequence. According to the device, a laser speckle generation light path and an imaging light path are combined together, the purpose of loading disordered optical lattices to cold atom groups is realized by using an aberration elimination lens, the high resolution imaging of the atom groups is also realized, and the high resolution imaging device has the advantages of simple structure, high light path integration degree, less occupied space, adjustment convenience and the like.

Description

technical field [0001] The invention relates to a cold atom system, in particular to a high-resolution imaging device for the cold atom system. Background technique [0002] At present, with the development of ultracold atom preparation technology and optical lattice technology, the use of ultracold atom and optical lattice technology for quantum simulation to study complex quantum problems in condensed matter physics has become a hot topic in international research, such as using it to study Superfluidity, superconductivity, localization, etc. In order to study these problems, it is necessary to load a disordered optical lattice, that is, laser speckle, on the ultracold atomic group. At the same time, a high-resolution imaging system is required to take pictures of the atoms in the disordered optical lattice, so as to observe the behavior of the atoms. [0003] The imaging optical path and speckle optical path of the usual ultracold atomic disorder system are independent, ...

AI Technical Summary

Problems solved by technology

The shape of the usual vacuum pool is usually a cuboid, and there are only four light-transmitting surfaces. Therefore, if two light-transmitting surfaces are occupied, it will become more difficult to add other lasers to operate the atoms in the vacuum pool, which will affect subsequent expansion of the system

In addition, due to the use of two lenses with large numerical apertures, the relative positional relationship between the two lenses and the atomic groups needs to be adjusted separately, and the adjustment process is relatively complicated.

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