Generating device of auto-acceleration type Bessel light beam

A technology for Bessel beams and generating devices, applied in optics, optical components, instruments, etc., can solve problems such as the difference between theory and reality, and achieve the effect of good application prospects

Active Publication Date: 2015-09-09
HARBIN ENG UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

However, this work has not attracted attention due to the discrepancy between theory and reality

Method used

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  • Generating device of auto-acceleration type Bessel light beam
  • Generating device of auto-acceleration type Bessel light beam
  • Generating device of auto-acceleration type Bessel light beam

Examples

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Embodiment example

[0051] Implementation case: Fabrication of a new self-accelerating Bessel-like beam generating device. Proceed as follows:

[0052] 1. First, take a section of ring-core optical fiber. The cladding refractive index is 1.4446, the core refractive index is 1.4517, the core layer thickness is 5um, the core centerline radius is 42.5um, and the fiber outer diameter is 125um.

[0053] 2. Strip one end of the ring-core optical fiber with a fiber stripper to strip the fiber coating, and clean the fiber coating with alcohol. Cut the end face of the optical fiber flat with an optical fiber cutter and put it into the optical fiber welding machine.

[0054] 3. Take a section of capillary optical fiber with a refractive index of 1.4446, an outer diameter of 125um and an inner diameter of 50um. One end of it is put into the optical fiber welding machine after the coating layer is stripped, cleaned and cut, and connected with the ring-core optical fiber.

[0055] 4. Take a section of grad...

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Abstract

Disclosed in the invention is a generating device of an auto-acceleration type Bessel light beam. The generating device comprises a light source, a receiving fiber, a field type transformation fiber and a phase modulation fiber. Light emitted by the light source is received by the receiving fiber; the field type transformation fiber converts a light field transmitted by the receiving fiber into a high-order Bessel light beam; and the phase modulation fiber carried out phase adjustment on the high-order Bessel light beam to obtain an auto-acceleration type Bessel light beam. According to the invention, the novel auto-acceleration type Bessel light beam has the characteristic of transverse acceleration, so that operation like particle capturing and transport along a bending track and the like can be carried out. With the control mechanism, a specific particle can be transported to a target position around an obstacle. The provided generating device has the great application prospects in the biological, chemical, and medical fields.

Description

technical field [0001] The invention belongs to the field of self-accelerating beams, in particular to a device for generating self-accelerating Bessel-like beams. Background technique [0002] Bessel beams are a special set of solutions to the free-space scalar wave equation propagating along the z-axis. [0003] In 1987, Durnin (Physical Review Letters, 1499-1501, 1987) proposed the mathematical model of Bessel beams for the first time, and proved that the Whitaker solution of the Helmholtz equation has a special solution in Bessel form, which has nothing to do with the direction of transmission. Researchers can experimentally obtain Bessel beams with limited energy, that is, Bessel-like beams, which have non-diffraction and self-healing properties within a certain transmission distance. After that, the researchers found that another solution of the wave equation in elliptic cylindrical coordinates——Mathieu beams (Mathieu beams) is also non-diffractive. [0004] As early...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/09
CPCG02B27/0994
Inventor 刘志海刘春兰张羽张亚勋赵恩铭苑立波
Owner HARBIN ENG UNIV
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