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Double core single optical fiber optical tweezers for capturing minute particle and its manufacture method

A micro-particle, dual-core fiber technology, applied in multi-layer core/clad fibers, clad fibers, radiation/particle processing, etc. Effect of particle trapping characteristics, small size, and easy integration of multi-fiber optical tweezers

Inactive Publication Date: 2008-03-26
HARBIN ENG UNIV
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Problems solved by technology

However, further studies have shown that for single-fiber optical tweezers with this structure, since the fiber only contains one core, after the transmitted light exits from the fiber tip of the parabolic structure, the beam waist radius of the beam waist light field formed at the tip of the fiber needle is restricted
Therefore, its trapping force cannot be further increased, and only three-dimensional trapping of smaller-scale particles can be achieved

Method used

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  • Double core single optical fiber optical tweezers for capturing minute particle and its manufacture method
  • Double core single optical fiber optical tweezers for capturing minute particle and its manufacture method

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Embodiment Construction

[0035] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0036] In conjunction with the figure, the composition of the dual-core single-fiber optical tweezers used to capture tiny particles of the present invention includes a dual-core optical fiber 2 containing two independent optical fiber cores 1 in the common cladding of the optical fiber, and one end of the optical fiber is formed by fusion tapering and sintering A tapered fiber optic tip 3 is formed, and a microlens 4 is provided at the end of the tapered fiber optic tip. Among them, 5 is the gradient light field formed by single-fiber optical tweezers for trapping tiny particles.

[0037] Fig. 2 is a schematic diagram of capturing tiny particles by the dual-core single-fiber optical tweezers of the present invention. Figure 6 is a tiny particle captured by a single fiber optical tweezers.

[0038] Fig. 3 is a schematic diagram of the fusion tapered coupling met...

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Abstract

This invention provides a kind of twin-core single fiber light probe which is used to seize minute particle and its preparation method. It includes the fiber, the said fiber is win-core fiber which includes two individual fiber cores in fiber public cladding, one end of the fiber is fused probe and the sintered cone fiber tip, and one end of the cone fiber tip has lenticule. The twin-core fiber light probe in this invention has two optical conversion section, one is twin-beam across lange-angle derivation collection section, changes the transmit direction of light wave in each fiber core of the twin-core fiber by the cone fiber whose cone angle change quickly, to lead the two beam to the tip end of the cone fiber; the other is light field compression section which forms large grads light field, realizes the light field compression of two beam by the lenticule in fiber tip end. The twin-core fiber light probe provided in this invention can be used for seizing the live biologic cell or the fixation, transpor and assembly of minute particles.

Description

(1) Technical field [0001] The invention relates to an optical tweezers, specifically a double-core optical fiber optical tweezers, and also relates to a method for making the optical tweezers. It belongs to the field of optical fiber technology. (2) Background technology [0002] Since Ashkin (1970, Phys.Rev.Lett., 24: 156-159; 1987, Nature, 330: 769-771) first discovered that the optical field gradient force can capture tiny particles and proposed the concept of optical tweezers, optical tweezers technology It has been widely used in various fields. Optical tweezers can be used to capture and manipulate particles ranging from small nanoparticles to hundreds of microns, from living cells to DNA biomacromolecular chains. With the deepening of research and the advancement of technology, optical tweezers have also developed from the initial single-beam optical tweezers to holographic optical tweezers, time-sharing scanning optical tweezers, and special beam optical tweezers....

Claims

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Application Information

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IPC IPC(8): G02B6/036G02B6/255G02B6/32G21K1/00G01N15/00G01N37/00
Inventor 苑立波刘志海杨军
Owner HARBIN ENG UNIV
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