Microstructure optical fiber

A technology of micro-structured optical fiber and optical fiber, which is applied in the direction of material analysis, measuring devices, and instruments through optical means, which can solve the problems of low sensitivity of optical fiber sensor, many air holes in optical fiber, and difficulty in realization, etc. It is easy to achieve drawing parameters Simple control and crafting, wide range of effects

Pending Publication Date: 2018-05-29
YANSHAN UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the designed micro-structure optical fiber air hole is relatively more, and the structure is relatively complex, which is relatively difficult to realize in the actual drawing work.
At the same time, the sensitivity of the fiber optic sensor is not very high

Method used

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Effect test

Embodiment 2

[0035] Embodiment 2 of the present invention is basically the same as Embodiment 1, the difference is that when the thickness of the gold film coated on the polished surface of the microstructured optical fiber is 30nm, the limiting loss of the microstructured optical fiber varies with the wavelength as follows: Figure 6 As shown, the refractive index range of different analytes to be measured here is 1.32-1.36. With the gradual increase of the refractive index of the analyte to be measured, the resonance peak in the y-polarized core conduction mode gradually red-shifted and the loss peak intensity gradually decreased, indicating that the surface plasmon resonance intensity gradually weakened. The range of resonance wavelength is 1660-1930nm (near infrared band). allowable Figure 6 It is obtained that when the refractive index changes from 1.35 to 1.36, the maximum resonance peak shift is 90nm, and the corresponding sensitivity is as high as 9000nm / RIU.

[0036] exist Fi...

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Abstract

The invention discloses a microstructure optical fiber. The microstructure optical fiber is mainly prepared from a fiber core, a background material, a cladding layer air hole and a nano-gold film, wherein the background material is attached on the fiber core; the optical fiber is of a spherical crown shaped structure; the optical fiber with the spherical crown shaped structure is obtained by uniformly arraying inner and outer layers of air holes to form a cylindrical optical fiber with a regular hexagonal lattice structure and polishing a side face of the cylindrical optical fiber, wherein two holes in the air holes of the outer layer are located at a plane section of the spherical crown shaped optical fiber and form two semicircular groove body openings; a fluid channel is formed by thesemicircular groove body openings; the nano-gold film is deposited on the plane section of the spherical crown shaped optical fiber located between the two semicircular groove body openings; the two semicircular groove body opening, the air holes of the inner layer and the gold film are used for surrounding a fiber core region. The microstructure optical fiber disclosed by the invention has the advantages of simple structure, high sensing flexibility and the like.

Description

technical field [0001] The invention relates to the field of optical fiber biosensing, in particular to a microstructured optical fiber with two micro-openings deposited on the side and a gold film deposited therebetween. Background technique [0002] With the increasing perfection and continuous development of microstructured optical fiber drawing technology, microstructured optical fiber has been widely used in the optical field due to its flexible structural design and unique and novel transmission characteristics, especially the sensing technology based on microstructured optical fiber. It has become a research hotspot in the field of new sensors. Among them, the microstructure optical fiber sensing technology with the help of the surface plasmon resonance effect has been favored by people. [0003] The microstructure optical fiber sensor based on surface plasmon resonance uses methods such as vacuum evaporation and chemical deposition to selectively deposit coating or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/01G01N21/41
CPCG01N21/01G01N21/4133
Inventor 李建设张树桓李曙光
Owner YANSHAN UNIV
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