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Rapid continuous adjustment method for diffraction-free two-dimensional optical crystal lattice period

An adjustment method and non-diffraction technology, applied in optics, optical components, installation, etc., can solve problems such as low efficiency and difficulty in realizing continuous adjustment of two-dimensional optical lattice periods, and achieve improved adjustment efficiency, simple structure, and easy installation Effect

Active Publication Date: 2019-09-20
TIANJIN UNIV
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Problems solved by technology

This method is inefficient, and the optical path structure must be changed every time the period of the non-diffractive two-dimensional optical lattice is changed, and the non-continuous change of the parameters of the optical path elements will make it difficult to realize the continuous adjustment of the two-dimensional optical lattice period

Method used

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  • Rapid continuous adjustment method for diffraction-free two-dimensional optical crystal lattice period
  • Rapid continuous adjustment method for diffraction-free two-dimensional optical crystal lattice period
  • Rapid continuous adjustment method for diffraction-free two-dimensional optical crystal lattice period

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Embodiment Construction

[0019] The period adjustment system with zoom lens can realize the rapid and continuous adjustment of the period of the non-diffraction two-dimensional optical lattice. The pattern will not appear to diverge or shrink. Although a non-diffracting beam is not parallel light, it has similar properties to parallel light in certain circumstances. For example, the commonly used parallel light beam expander system (a lens group composed of two lenses with unequal focal lengths) can produce a beam expansion effect on parallel light, and the present invention has found that it can also realize the overall enlargement of the non-diffraction two-dimensional optical lattice and also complete the pairing. Tuning of the period of a diffraction-free two-dimensional optical lattice. The period of a non-diffractive two-dimensional optical lattice is determined by the wave vector direction of its interference plane wave. The parallel beam expander system can adjust the wave vector direction of...

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Abstract

The invention relates to a rapid continuous adjustment method for a diffraction-free two-dimensional optical crystal lattice period. A zoom lens and a lens are sequentially added along an optical axis on an optical path for generating a two-dimensional optical crystal lattice. The position of a back focal plane of the zoom lens is kept unchanged during focusing, and the distance between the zoom lens and the lens is the sum of the back focal length of the zoom lens and the front focal length of the lens; by adjusting the focal length of the zoom lens, the continuous change of the amplification factor of the beam expanding system is achieved, so that the rapid continuous adjustment of the diffraction-free two-dimensional optical lattice period can be achieved.

Description

technical field [0001] The invention relates to a method for rapidly and continuously adjusting the period of a non-diffraction two-dimensional optical lattice, especially for assisting the light field regulation method based on a spatial light modulator, multi-core optical fiber interference method, etc. to generate a non-diffraction two-dimensional optical lattice system. Background technique [0002] The optical lattice is a periodic potential well pattern generated by the intersection and interference of multiple laser beams. As early as 1989, Bell Laboratories Steven Zhu and others used two laser beams to propagate in opposite directions to generate an interference standing wave field, and realized a one-dimensional optical lattice for the first time in the experiment. Subsequently, Grynberg et al. laid out the interference of multiple laser beams according to certain rules, successfully obtained two-dimensional optical lattices and three-dimensional optical lattices, ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/09G02B7/04
CPCG02B27/0933G02B27/0955G02B27/0927G02B7/04
Inventor 胡春光曲正胡小唐胡晓东
Owner TIANJIN UNIV
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