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

A kind of capillary optical fiber inner wall grating and its preparation method

A technology of capillary and grating, which is applied in cladding optical fiber, optical waveguide, optical fiber, etc., can solve the problems of easy fiber breakage at the welding point of the optical fiber, poor reliability of the optical fiber system, and damage to the tensile strength of the optical fiber. The effect of low strength, easy connection, and low cost

Active Publication Date: 2021-04-20
HARBIN ENG UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nevertheless, the physical damage to the outer surface of the optical fiber will still greatly damage the tensile strength of the optical fiber, and the fiber is also prone to fiber breakage at the welding point, resulting in poor reliability, low mechanical strength, and low service life of the optical fiber system.

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
  • A kind of capillary optical fiber inner wall grating and its preparation method
  • A kind of capillary optical fiber inner wall grating and its preparation method
  • A kind of capillary optical fiber inner wall grating and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] As shown in Figure 1 (a) and Figure 1 (b), it is the implementation of the inner wall grating of a single-core capillary fiber; it includes a four-layer structure: an annular cladding 1, a fiber core 2, an inner wall grating 3, and a large-sized air hole 4, wherein The fiber core 2 is located in the annular cladding 1, the grating 3 is located in the inner wall of the annular cladding 1, and the air hole 4 is located in the center. The specific preparation method is as follows:

[0036] Step 1.1, fixing a section of single-core capillary optical fiber to be written into the grating;

[0037] Step 1.2, inject the hydrofluoric acid solution into the central air hole 4 and seal it;

[0038] Step 1.3, paste the ultrasonic source 5 on the surface of the optical fiber, the ultrasonic wave generated by the ultrasonic source 5 forms an ultrasonic standing wave along the length direction of the optical fiber in the closed space of the air hole 4 filled with hydrofluoric acid, s...

Embodiment 2

[0043] Figure 2(a) and Figure 2(b) show the grating on the inner wall of the double-hole capillary fiber. The fiber core is located at the center, the grating 3 is located on the inner wall of the air hole in the cladding, and the double air holes are placed on both sides of the fiber core and have a symmetrical structure, which is convenient for introducing functional materials into the holes to realize real-time tunable grating. In this embodiment, not limited to double holes, it may be multiple holes, the number of air holes determines the number of grating arrays, and each air hole accommodates and is responsible for tuning one grating array. The specific preparation method is as follows:

[0044] Step 2.1, fixing a section of double-hole capillary optical fiber to be written into the grating;

[0045] Step 2.2, inject hydrofluoric acid solution into two symmetrical air holes 4 and seal them;

[0046] Step 2.3, paste the ultrasonic source 5 on the surface of the optical ...

Embodiment 3

[0049] As shown in Figure 3(a) and Figure 3(b), the inner wall grating of capillary fiber with ring waveguide layer includes four layers: ring cladding layer 1, ring waveguide layer 6, inner wall grating 3, and central air hole 4. The ring waveguide layer consists of ring waveguide cores. The annular waveguide layer 6 is located in the wall of the annular cladding 1, the grating 3 is located on the inner wall of the annular cladding 1, and the air hole 4 is located in the center. The specific preparation method is as follows:

[0050] Step 3.1, fixing a section of capillary fiber to be written into the ring waveguide layer of the grating;

[0051] Step 3.2, inject the hydrofluoric acid solution into the central air hole 4 and seal it;

[0052] Step 3.3, paste the ultrasonic source 5 on the surface of the optical fiber, the ultrasonic wave generated by the ultrasonic source 5 forms an ultrasonic standing wave along the length direction of the optical fiber in the closed space...

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

No PUM Login to View More

Abstract

The invention belongs to the technical field of optical fiber gratings, and in particular relates to a capillary optical fiber inner wall grating and a preparation method thereof. The fiber grating has an inner wall grating structure, no physical damage on the outer surface, and high mechanical strength; the size of the grating period can be changed by adjusting the ultrasonic wavelength, and the etching depth of the grating can be changed by adjusting the concentration of hydrofluoric acid solution and the etching time; the optical fiber The air hole in the center of the grating provides a closed space, which facilitates the introduction of functional materials to realize the real-time tuning function of the fiber grating; the invention has the advantages of free packaging, tunable, simple preparation method, low cost, etc. The problem of low mechanical strength and low service life has broad development prospects.

Description

technical field [0001] The invention belongs to the technical field of optical fiber gratings, and in particular relates to a capillary optical fiber inner wall grating and a preparation method thereof. Background technique [0002] Fiber Bragg Grating is a fiber photonic device made by using the photosensitive effect of doped fiber to cause periodic changes in the refractive index along the length of the fiber core. Due to the advantages of small insertion loss, small size, and high extinction ratio of fiber gratings, its resonant wavelength is sensitive to changes in the external environment such as temperature, strain, and concentration, so it has been widely used in the fields of optical fiber communication and sensing. In recent years, fiber gratings have also achieved rapid development in writing technology, theoretical research and applications. [0003] At present, the methods of making fiber gratings are mainly divided into two categories: one is to use etching tec...

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
CPCG02B6/02123G02B6/02304
Inventor 田凤军白若兰王宝库李立张建中
Owner HARBIN ENG UNIV