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Satellite-type helical multi-core fiber optical micro-tweezers capable of achieving rotation of small particles and preparation method thereof

A technology of multi-core optical fiber and tiny particles, which is applied in the field of optical fiber technology research to achieve the effects of saving physical space, reducing input optical power, and improving practicability

Inactive Publication Date: 2012-07-11
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since then, the optical tweezers based on circular multi-core optical fiber proposed by Yuan Libo et al., the publication number is CN101236275; It can realize the functions of capturing particles, positioning them in space, and rotating them in space, but there has never been a report on optical tweezers that can emit captured particles

Method used

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  • Satellite-type helical multi-core fiber optical micro-tweezers capable of achieving rotation of small particles and preparation method thereof
  • Satellite-type helical multi-core fiber optical micro-tweezers capable of achieving rotation of small particles and preparation method thereof
  • Satellite-type helical multi-core fiber optical micro-tweezers capable of achieving rotation of small particles and preparation method thereof

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Embodiment Construction

[0025] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0026] figure 1 Among them, 1 is the satellite spiral multi-core optical fiber, 1-1 is the core at the axis of the optical fiber, 1-2 is the satellite core of the optical fiber, and 1-3 is the cone prepared by the end of the satellite spiral multi-core optical fiber structure, the semi-cone angle α is controlled at π / 2-arcsin(n liquid / n core )<α<π / 2, 2 is the standard single-mode fiber, 3 is the laser light source, 4 is the optical path changing device, 5 is the direct coupling connection position between the standard single-mode fiber and the satellite spiral multi-core fiber, 6 is the satellite The position of the spiral multi-core optical fiber is thermally melted to pull the cone, so that a Mach-Zehnder interferometer is formed between 5 and 6, and the optical path difference between different fiber cores is changed by adjusting the optical path changing d...

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Abstract

The invention provides satellite-type helical multi-core fiber optical micro-tweezers capable of achieving the rotation of small particles and a preparation method thereof. A laser source is connected with one end of a standard single-mode fiber, and the other end of the standard single-mode fiber is coupled with the satellite-type helical multi-core fiber by thermal-fused bi-conical taper to form a first thermal-fused bi-conical taper position; the satellite-type helical multi-core fiber is attached to an optical-path changing device, and the satellite-type helical multi-core fiber passing through the optical-path changing device is further subjected to the thermal-fused bi-conical taper operation to form a second thermal-fused bi-conical taper position; and the other end of the satellite-type helical multi-core fiber is prepared into a pyramidal shape in a processing manner of finely grinding. Therefore, the invention can save the physical space and greatly reduce the optical input power of the system, so as to reduce the damage on the particles to be trapped; the particles can be trapped in a more flexible, more accurate and adjustable manner; and the vortex-shaped optical trapcan be naturally formed at the fiber end, thus achieving the rotation of the particles and the motor function of the operated particles.

Description

technical field [0001] The invention belongs to the field of optical fiber technology research. The invention relates to a multi-core optical fiber low-light hand, in particular to a multi-core optical fiber low-light hand which can realize the rotation of tiny particles. Background technique [0002] Optical tweezers are tools for trapping and manipulating tiny particles using the gradient force and scattering force of light intensity distribution. In 1986, Askin proposed a three-dimensional optical potential well based on a single-beam laser in the article "Observation of a single-beam gradient force optical trap for dielectric particles", which is used to realize the three-dimensional space control of particles, because this beam can achieve spatial The clamping of tiny particles, hence the name "optical tweezers", this article was published in Opt.Lett.11, 288-290. Since then, the optical tweezers technology has developed rapidly and has become an important research te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/255G02B6/02G21K1/00
Inventor 苑立波张羽杨军
Owner HARBIN ENG UNIV
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