CN206161892U - Optic fibre bragg grating based on coreless optical fiber - Google Patents
Optic fibre bragg grating based on coreless optical fiber Download PDFInfo
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- CN206161892U CN206161892U CN201621192086.3U CN201621192086U CN206161892U CN 206161892 U CN206161892 U CN 206161892U CN 201621192086 U CN201621192086 U CN 201621192086U CN 206161892 U CN206161892 U CN 206161892U
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- microns
- bragg grating
- optical fiber
- fiber
- grating
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- 239000000835 fiber Substances 0.000 title claims abstract description 41
- 239000013307 optical fiber Substances 0.000 title abstract description 9
- 239000012080 ambient air Substances 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229940085805 fiberall Drugs 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000000985 reflectance spectrum Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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- Light Guides In General And Applications Therefor (AREA)
Abstract
The utility model discloses an optic fibre bragg grating based on coreless optical fiber. The utility model discloses regard as the fibre core with the coreless optical fiber body, surrounding air acts as the covering and constitutes the waveguide, if the reflection center wavelength of this optic fibre bragg grating is lambda 0, grating period lambda = lambda 02neff, wherein neff is the effective refractive index of coreless optical fiber bragg grating, then in every grating period, the length of inscribing is 5 microns to 50 microns, the width is 1 micron to 5 microns, the degree of depth of inscribing is 1 micron to 10 microns, fiber grating cycle number is 100 to 5000. The utility model discloses use the air as the covering, convenient, succinct, easy operation, have do not receive electromagnetic interference, can realize range sensing far away, advantages such as low price, compact structure, big measuring range.
Description
Technical field
The utility model belongs to the technical field of fiber grating making, is related to a kind of optical fiber Bragg based on coreless fiber
Grating.
Background technology
The features such as fiber grating is according to its small volume, electromagnetism interference, light weight, low cost, by people's concern and green grass or young crops
Look at, while fiber grating can simultaneously measure multiple physical quantitys (temperature, stress, pressure etc.) and answer using wavelength-division on optical fiber all the way
With advantages such as technologies.Fiber Bragg Grating FBG is mainly used in intelligent well and pipeline, intelligence structure monitoring, intelligent civil engineering
Building, and navigation sensing, intelligent aviation；
The Fiber Bragg Grating FBG for obtaining large-scale application at present is mostly to inscribe on general single mode fiber.It is general
Logical single-mode fiber cladding radius are 62.5 μm, and fiber core radius are 4.5 μm, and made Fiber Bragg Grating FBG is located at fibre core, and
Without directly contact, to external world medium such as liquid refractivity sensing sensitivity is not high in the external world.Coreless fiber is a kind of being different from commonly
The quartz fibre of the uniform material of single-mode fiber, in use, coreless fiber itself acts as fibre core, and ambient air serves as bag
Layer constitutes waveguide, and such femto-second laser polishing grid in coreless fiber are just easy to directly to be inscribed, made
Fiber Bragg Grating FBG can be with directly contact sensor information, with huge application prospect.
The content of the invention
The utility model is aiming at the deficiencies in the prior art, it is proposed that a kind of optical fiber Bragg light based on coreless fiber
Grid.
The utility model solves the technical scheme that technical problem is taken：
The utility model using coreless fiber body as fibre core, serve as covering and constitute waveguide, if the optical fiber cloth by ambient air
The reflection kernel wavelength of glug grating be λ 0, grating period A=λ 0/2neff, wherein neffFor coreless fiber Bragg grating
Effective refractive index, then in each screen periods, the length of inscription is 5 microns to 50 microns, and width is 1 micron to 5 microns, is carved
The depth write is 1 micron to 10 microns, and fiber grating number of cycles is 100 to 5000.
The utility model is convenient, succinct, easy to operate with air as covering；With not receive electromagnetic interference, long distance can be realized
From sensing, cheap, compact conformation, wide-measuring range the advantages of.
Description of the drawings
Fig. 1 a are structural representation of the present utility model；
Fig. 1 b are the structural representation of coreless fiber Bragg grating；
Fig. 2 is coreless fiber Bragg grating reflection spectrum analog figure.
Specific embodiment
As shown in Figure 1a, make device of the present utility model include a wavelength for 800nm femto-second laser 1, a set of
Computer 6, one section of coreless fiber 3, a pair of optical fiber of 2, control femto-second laser 1 of focusing system and three-D displacement platform 5
4, three-D displacement platform 5 of fixture.
A wavelength is selected for 1, one section of coreless fiber 3 of femto-second laser, a pair of fiber clamps, 4, three-dimensional of 800nm
The computer 6 of 5, control femto-second laser 1 of displacement platform and three-D displacement platform 5；Using femto-second laser 1 directly in nothing
Bragg grating is inscribed on core fibre 3, its making step is as follows：Coreless fiber 3 is tried one's best and smooth is placed on a pair of fiber clamps 4
On, a pair of fiber clamps 4 are fixed on three-D displacement platform 5, adjust focusing system 2 and cause the output laser of femto-second laser 1
Focus on the surface of coreless fiber 2；Grating period A is according to λ=2neffΛ calculates the inscribed structures cycle, is flown by the control of computer 6
Second laser instrument 1 and three-D displacement platform 5 carry out inscription periodic structure to coreless fiber 2, so as to form one section with Prague light
Grid.
As shown in Figure 1 b, according to the Fiber Bragg Grating FBG obtained by above-mentioned making and mode, in each of which screen periods
Depth h is 1 to 10 micron, and width d is 1 to 5 micron, and it is 5 to 50 microns to inscribe length L, number N, centre wavelength 1550nm.
As shown in Fig. 2 embodying reflectance spectrum simulation drawing of the present utility model.
Claims (1)
1. the Fiber Bragg Grating FBG of coreless fiber is based on, it is characterised in that：Using coreless fiber body as fibre core, ambient air
Serve as covering and constitute waveguide, if the reflection kernel wavelength of the Fiber Bragg Grating FBG is λ 0, grating period A=λ 0/2neff, its
Middle neffFor the effective refractive index of coreless fiber Bragg grating, then in each screen periods, the length of inscription be 5 microns extremely
50 microns, width is 1 micron to 5 microns, and the depth of inscription is 1 micron to 10 microns, fiber grating number of cycles be 100 to
5000。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621192086.3U CN206161892U (en) | 2016-11-06 | 2016-11-06 | Optic fibre bragg grating based on coreless optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621192086.3U CN206161892U (en) | 2016-11-06 | 2016-11-06 | Optic fibre bragg grating based on coreless optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206161892U true CN206161892U (en) | 2017-05-10 |
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ID=58657751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621192086.3U Expired - Fee Related CN206161892U (en) | 2016-11-06 | 2016-11-06 | Optic fibre bragg grating based on coreless optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206161892U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107687907A (en) * | 2017-07-17 | 2018-02-13 | 东北大学 | A kind of temperature sensing method based on liquid filling hollow annular fiber grating |
-
2016
- 2016-11-06 CN CN201621192086.3U patent/CN206161892U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107687907A (en) * | 2017-07-17 | 2018-02-13 | 东北大学 | A kind of temperature sensing method based on liquid filling hollow annular fiber grating |
| CN107687907B (en) * | 2017-07-17 | 2020-03-24 | 东北大学 | Temperature sensing method based on liquid-filled hollow annular fiber bragg grating |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170510 Termination date: 20191106 |
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| CF01 | Termination of patent right due to non-payment of annual fee |