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

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....

AI Technical Summary

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

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