A waveguide high-order mode converter

A high-order mode, converter technology, applied in instruments, sound-producing instruments, etc., can solve problems such as cell damage, and achieve the effects of easy acquisition, easy preparation, and simple structure

Active Publication Date: 2019-09-27
HARBIN ENG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the application of optical tweezers also has some limitations. High-energy lasers will cause certain damage to cells. Due to the wavelength of light, the size of particles that can be captured is less than 10um, so optical tweezers are often used in light-colored areas of transparent or non-transparent substances.

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  • A waveguide high-order mode converter
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Embodiment Construction

[0023] The specific implementation cases of the present invention will be described in detail below according to the accompanying drawings.

[0024] figure 1 Assembly drawing (solidworks drawing) for the waveguide. The fundamental mode is incident from the Bragg waveguide, producing a radially distributed higher-order mode field during the first non-Bragg waveguide period. Both the Bragg waveguide (A) and the non-Bragg waveguide (B) have five periods, and the two are connected by a flange ring (C). Arrows indicate the direction of sound wave incidence.

[0025] A is a Bragg waveguide

[0026] B is a non-Bragg waveguide

[0027] C is flange ring

[0028] figure 2 is a schematic diagram of the periodic unit of the Bragg waveguide;

[0029] Λ1 is the period length of the Bragg waveguide

[0030] R1 is the average inner diameter of the Bragg waveguide

[0031] ε is the periodic fluctuation parameter, take ε=0.1R

[0032] image 3 is a schematic diagram of a non-Bragg w...

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Abstract

The invention relates to the technical field of acoustic higher-order mode field excitation and regulation and control, and particularly relates to a waveguide higher-order mode converter which excites a higher-order mode field through a fundamental mode and can adjust the frequency of the mode field. The waveguide higher-order mode converter comprises a cylindrical metal acoustic waveguide, a Bragg waveguide A based on Bragg resonance and a non-Bragg waveguide B based on non-Bragg resonance. The two waveguides are connected through a flange ring. A transmission peak appears in forbidden bands through the mutual effect between the forbidden bands so that the higher-order mode field distributed along the radius is generated, and conversion of acoustic waves from the fundamental mode to the higher-order mode is completed. Most of resistive acoustic applications are conveniently compatible, and the converter can work in all the audible bands. The materials are easy to obtain, the structure is simple and preparation is easy.

Description

technical field [0001] The invention relates to the technical field of acoustic high-order mode field excitation and regulation. Specifically, it relates to a waveguide high-order mode converter in which a fundamental mode excites a high-order mode field and can adjust the frequency of the mode field. Background technique [0002] Non-contact particle trapping has important applications in the fields of biology, physical chemistry, biochemistry and optics. Optical tweezers is a relatively mature technology among them. It can use Bessel beams to capture particles and cells and separate them to achieve particle sorting and classification. However, the application of optical tweezers also has some limitations. High-energy lasers will cause certain damage to cells. Due to the wavelength of light, the size of particles that can be captured is less than 10um, so optical tweezers are often used in light-colored areas of transparent or non-transparent substances. . [0003] Acous...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10K11/26
Inventor 樊亚仙桑汤庆徐丹徐兰兰陶智勇
Owner HARBIN ENG UNIV
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