Unlock instant, AI-driven research and patent intelligence for your innovation.

Optical fiber with higher numerical aperture and preparation method thereof

A numerical aperture and optical fiber technology, applied in the field of optical fiber lighting, can solve the problems of high numerical aperture and inaccessibility, and achieve the effect of improving toughness

Active Publication Date: 2021-12-10
武汉光谷长盈通计量有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

None of the above structures can obtain a higher numerical aperture

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optical fiber with higher numerical aperture and preparation method thereof
  • Optical fiber with higher numerical aperture and preparation method thereof
  • Optical fiber with higher numerical aperture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as Figure 1~4 Among them, an optical fiber with a higher numerical aperture, it includes a plurality of cores 1 and a plurality of air capillaries 2, the plurality of cores 1 and a plurality of air capillaries 2 are arranged in a staggered manner, so that the core 1 can obtain a higher High optical coupling performance. Therefore, the structure utilizes the relative refractive index difference between the core 1 and the air capillary 2 to increase the numerical aperture of the optical fiber, so that light can be more easily coupled into the optical fiber.

[0042] The preferred solution is as figure 1 Among them, the fiber cores 1 are closely arranged in a ribbon shape, and air capillaries 2 arranged in ribbon shape are arranged on both sides of the ribbon structure of the fiber core 1 . With this structure, the upper and lower layers of the ribbon-shaped core are separated by the ribbon-shaped air capillary, so that each layer of the core forms a good waveguid...

Embodiment 2

[0055] A method for preparing the above-mentioned optical fiber with a relatively high numerical aperture, comprising the following steps: fixedly installing the optical fiber preform and the glass tube preform in a staggered array on an optical fiber drawing tower, heating to 1800-2000°C, Arrayed optical fibers of 5 microns to 35 microns are drawn, and after the arrayed optical fibers are bundled, a cladding 3 is prepared on the bundled surface. The specific steps are: the bundled core 1 and the air capillary 2 are penetrated into the glass tube of the cladding 3, wherein the glass tube of the cladding 3 is processed to have a tapered mouth, and its minimum opening diameter is slightly larger than the outer connection of the arrayed optical fiber bundle. Round diameter, heat the cladding 3 glass tube to 1800~2000°C, pull out the fiber bundle and the cladding 3 glass tube at the same time, that is, the cladding 3, the core 1 and the air capillary 2 fiber bundles are processed t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
radiusaaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The present invention provides an optical fiber with relatively high numerical aperture and a preparation method, which comprises a plurality of fiber cores and a plurality of air capillaries, wherein the plurality of fiber cores and the plurality of air capillaries are staggered, so that the fiber core can obtain higher optical coupling performance. The preparation method includes the following steps: fixing and installing the optical fiber preform and the glass tube preform on the optical fiber drawing tower in a staggered array manner, heating to 1800-2000 DEG C, pulling out an array optical fiber of 5 microns to 35 microns, After the array fibers are bundled, a coating is prepared on the bundled surface. The present invention can improve and flexibly control the numerical aperture. After testing, the optical fiber of the present invention has a numerical aperture of 0.69. Larger area illumination can be achieved through the structure of ribbon core or multi-core.

Description

technical field [0001] The invention relates to the technical field of optical fiber lighting, in particular to an optical fiber with a relatively high numerical aperture and a preparation method. Background technique [0002] Biological endoscopes are widely used in clinical medicine. They have functions such as image sensors, optical lenses, light source lighting, and mechanical devices. They can enter the stomach or enter the human body through other channels. Lesions that cannot be seen by X-rays can be seen with an endoscope, so it is very beneficial for diagnosis or treatment. For example, with the help of an endoscope, doctors can observe ulcers or tumors in the stomach and formulate the best treatment plan accordingly. The overall length of the endoscope is 2-3 meters, and the diameter is about 800 microns. Figure 8a Demonstrate the lighting function of the endoscope, Figure 8b It is a photograph of the end face of an endoscope, in which the fibers used for illum...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/02
CPCG02B6/02042G02B6/02314G02B6/02338
Inventor 廉正刚王力东丁凡徐江河余倩卿李长松余妍
Owner 武汉光谷长盈通计量有限公司