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A kind of preparation method of AC magneto-optical trap

A technology of magneto-optical traps and acousto-optical modulators, which is applied to lasers, laser parts, circuits, etc., to achieve the effects of strong operability, simple and effective preparation methods, and simple and effective methods.

Inactive Publication Date: 2019-05-31
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, no one has been found to apply it to the preparation of AC magneto-optical traps

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  • A kind of preparation method of AC magneto-optical trap
  • A kind of preparation method of AC magneto-optical trap
  • A kind of preparation method of AC magneto-optical trap

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Embodiment Construction

[0020] combined preparation 39 The embodiment of K AC magneto-optical trap, and the present invention will be further described in detail in conjunction with the accompanying drawings. The process, conditions, experimental methods, etc. for implementing the present invention, except for the content specifically mentioned below, are common knowledge and common knowledge in this field, and the present invention has no special limitation content. The operation steps are as follows:

[0021] (1) Amplification of the laser light source

[0022] as attached figure 2 As shown, two kinds of light are needed to prepare the magneto-optical trap, cooling light and pumping light. Their detuning amounts are -32MHz and -38 MHz, respectively. as attached image 3 As shown, the two laser beams with a frequency higher than the required frequency of 110 MHz are combined and injected into the tapered amplifier (1) for amplification. After passing through the first and second isolators (2,...

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Abstract

The present invention belongs to the atom and molecule optics technology field, and concretely discloses a preparation method of an alternating current magneto-optical trap. Sinusoidal signals are employed to modulate the inverted Helmholtz coil current to generate an alternating magnetic field. Two acoustic optical modulators disposed back to back, a half-wave plate and a polarization beam splitter are employed to realize the rapid conversion of the laser trapping polarization configuration. The raid switching laser features of the acoustic optical modulators are employed to realize the laser beam polarization configuration switching of more than 10MHz and coordinate with a direct current and radio-frequency circuit to realize the magneto-optical trap from a quasi state (DC) to 10MHz polarization / magnetic field switching frequency. The preparation method of the alternating current magneto-optical trap is simple and efficient and wide in work frequency, can satisfy the technical requirement of each aspect such as the ultracold ion preparation and molecule cooling, and can be widely applied to the quantum optics field in the cold molecule and the nonmagnetic condition.

Description

technical field [0001] The invention belongs to the field of atomic and molecular optics, and specifically discloses a preparation method of an AC magneto-optical trap. Background technique [0002] Conventional magneto-optical traps have become the basic experimental technique for laser cooling and trapping atoms. It is composed of three pairs of perpendicular laser beams with specific polarization configuration and red-detuned laser beams forming optical sticky clusters and gradient magnetic fields generated by reverse Helmholtz coils. During the preparation process, the polarization configuration of the laser beam and the gradient magnetic field do not change with time. Due to the existence of the eddy current generated by the coil, it is difficult for us to turn off the magnetic field cleanly within 1 ms (less than 10 -7 T). [0003] In 2008, the experimental group of the University of Manchester successfully prepared an AC magneto-optical trap. Unlike traditional m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21K1/00G21K1/093H01S3/13
CPCG21K1/00G21K1/093H01S3/13
Inventor 方亚毜裘李阳吴赛骏
Owner FUDAN UNIV