Small core diameter ultra-high numerical aperture cone optical fiber optical tweezers and manufacturing method thereof

A technology of numerical aperture and optical fiber optical tweezers, applied in the field of optical fiber, can solve problems such as difficulty in maintaining the consistency of optical and mechanical properties, and insufficient structural strength, and achieve the effects of ensuring standardization and consistency, simple structure, and flexible operation

Inactive Publication Date: 2008-02-06
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in terms of structure, this kind of parabolic microstructure single-fiber needlepoint optical tweezers has the problem of insufficient structural strength due to the thin tip.
On t

Method used

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  • Small core diameter ultra-high numerical aperture cone optical fiber optical tweezers and manufacturing method thereof
  • Small core diameter ultra-high numerical aperture cone optical fiber optical tweezers and manufacturing method thereof

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Embodiment

[0040] Embodiment: Use small core diameter ultrahigh numerical aperture cone fiber optical tweezers to realize the transportation of tiny objects.

[0041] The preparation method of the small core diameter super high numerical aperture cone optical fiber optical tweezers of this embodiment is as follows:

[0042]1. Preparation or selection of optical fiber: The numerical aperture of ordinary standard single-mode silica optical fiber for optical fiber communication is generally about 0.11, and the maximum divergence angle corresponding to the optical fiber exit light field in air is about 6.32°, and in water, it is about 4.74°. Therefore, the gradient force potential well of the formed divergent light field is relatively shallow, which is not enough to overcome the gravity of the particles. When the present invention is making optical fiber optical tweezers, on the one hand, an optical fiber with small core diameter and ultra-high numerical aperture will be prepared or selected...

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Abstract

The present invention discloses a pair of small core and ultra-large numerical aperture taper fiber tweezers and a fabricating method thereof. The present invention is a pair of small core and ultra-large numerical aperture taper fiber tweezers, using the small core and ultra-large numerical aperture fiber to be processed, with the end of the fiber polished into a cone shape and the angle of the cone tip formed between 30 degrees and 120 degrees, and connected by means of the thermal thawing diffusion numerical aperture matching technology. Due to the large numerical aperture at the fiber tip, a divergent optical field is formed to cause a larger gradient force potential well of the optical field, thereby overcoming the deadweight of particles, realizing the single fiber three-dimensional trap of minute particles and such operations like fixing, moving, and transporting the trapped particles and so on. The small core and ultra-large numerical aperture taper fiber tweezers in the present invention can be used for trapping living biological cells or moving and assembling minute particles.

Description

(1) Technical field [0001] The invention belongs to the field of optical fiber technology, and in particular relates to a small core diameter superhigh numerical aperture cone optical fiber optical tweezers technology. (2) Background technology [0002] In 1986, Askin (Optics Letters, 11, 288-290, 1986) introduced a single laser beam into a high numerical aperture objective lens to form a three-dimensional optical potential well, realizing the three-dimensional space control of tiny particles. A strong focused laser is used to simultaneously form a gradient force potential well in the x-y plane and along the z-axis direction, thereby stably trapping particles. Since the optical trap is formed using only one laser beam, it is called a single-beam gradient force optical trap, which is commonly referred to as optical tweezers. [0003] At present, people can use optical tweezers to capture, sort, manipulate and bend the cytoskeleton of cells, organelles and chromosomes, overco...

Claims

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Application Information

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IPC IPC(8): G02B6/00G02B6/255G02B6/25G21K1/00G01N15/00G01N37/00
Inventor 苑立波杨军刘志海
Owner HARBIN ENG UNIV
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