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Non-diffractive two-dimensional optical lattice period adjustment system based on zoom lens

A zoom lens and period adjustment technology, applied in optics, optical components, instruments, etc., can solve the problems of difficulty in realizing continuous adjustment of two-dimensional optical lattice period, low efficiency, etc., and achieve a simple structure, improve adjustment efficiency, and easy installation. Effect

Active Publication Date: 2020-06-12
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

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  • Non-diffractive two-dimensional optical lattice period adjustment system based on zoom lens
  • Non-diffractive two-dimensional optical lattice period adjustment system based on zoom lens
  • Non-diffractive two-dimensional optical lattice period adjustment system based on zoom lens

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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 non-diffraction two-dimensional optical lattice period adjusting system based on a zoom lens. The system comprises a laser, a first half-wave plate, a lens group for expanding beams, a beam splitting prism, a second half-wave plate, a spatial light modulator, a first lens, a mask plate, a reflector, a second lens, a zoom lens, a third lens and a detector. After the light beam retaining the base level information is reflected by the reflector, the light beam is interfered behind the reflector through the second lens to form a non-diffraction two-dimensional optical lattice, then sequentially passes through the zoom lens and the third lens and is imaged on the detector, wherein the position of the back focal plane of the zoom lens is kept unchanged during focusing, and the distance between the zoom lens and the third lens is the sum of the back focal length of the zoom lens and the front focal length of the third 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 rapid continuous adjustment system for the non-diffraction two-dimensional optical lattice period, especially for assisting the light field regulation method based on the spatial light modulator, the multi-core optical fiber interference method, etc. to generate the 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, and...

Claims

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Application Information

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