CN105372753B - A kind of less fundamental mode optical fibre of three toroidal cores - Google Patents
A kind of less fundamental mode optical fibre of three toroidal cores Download PDFInfo
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- CN105372753B CN105372753B CN201510742422.0A CN201510742422A CN105372753B CN 105372753 B CN105372753 B CN 105372753B CN 201510742422 A CN201510742422 A CN 201510742422A CN 105372753 B CN105372753 B CN 105372753B
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- fundamental mode
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02004—Optical fibres with cladding with or without a coating characterised by the core effective area or mode field radius
- G02B6/02009—Large effective area or mode field radius, e.g. to reduce nonlinear effects in single mode fibres
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02042—Multicore optical fibres
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Abstract
The present invention relates to a kind of less fundamental mode optical fibres of three toroidal cores；Its cross section includes the slightly larger cylindrical core of pure silicon dioxide matrix and three refractive index；The sizes of three cylindrical cores is identical, index distribution is identical, and adjacent spaces very little；There is close coupling in fiber mode in three toroidal cores, forms the super model of more large effective area, so as to reduce the nonlinear effect in optical fiber transmission；The Characteristics of modes of electromagnetic field is transmitted in optical fiber to be changed by changing these toroid sizes, position and index distribution.
Description
Technical field
The present invention relates to a kind of less fundamental mode optical fibre of three toroidal cores, optical fiber optics can be applied to, fiber optic communication, optical-fiber wireless connect
Enter and the fields such as optical Information Processing.
Background technology
The various businesses flow explosive growth that cloud computing, big data and Streaming Media etc. are caused, world's every country phase
After having formulated national broadband strategy, fiber optic communication tolerance faces the limitation of approach Shannon limit, and development has welcome unprecedented
Opportunities and challenges.In recent years, fiber optic communication industry is around space division multiplexing (including core type multiplexing and mode multiplexing and its combination)
This physical dimension realizes breakthrough to communication network transmission capacity；Multi-core optical fiber in space division multiplexing and less fundamental mode optical fibre research into
For forward position research hotspot；For single mode optical fiber, less fundamental mode optical fibre can reduce Transmission system by increasing effective area
In nonlinear effect；Particularly, toroidal cores less fundamental mode optical fibre can further improve optical fiber transmission property [Motoki
Kasahara, Kunimasa Saitoh, Taiji Sakamoto, et al., Design of Three-Spatial-Mode
Ring-Core Fiber, Journal of Lightwave Technology, Vol.32, No.7, April 1,2014,
1337；Alexander R.May and Michalis N.Zervas, Few-Mode Fibers with Improved Mode
Spacing, ECOC 2015,0501].A kind of super model optical fiber of multicore close coupling has also obtained everybody concern；Multicore super model light
Fibre has the big effective area of bigger, high-order density of modes, low mode dependence loss, low mode coupling and low difference modes group delay
[Cen Xia, Neng Bai, Ibrahim Ozdur, et al., Supermodes for optical transmission,
Optics Express, 2011,19 (17)：16653-16664；Cen Xia, Neng Bai, Rodrigo Amezcua-
Correa, et al., Supermodes in strongly-coupled multi-core fibers, OFC 2013,
OTh3K.5]；As it can be seen that large effective area fiber research has important learning value and application value, have a extensive future, meaning weight
Greatly.
Invention content
In state natural sciences fund key project (number 61431009), Shandong Province's Natural Science Fund In The Light
(ZR2011FM015), it is comprehensive under " Mount Taishan scholar " construction project specific project expenditure, the Government of Shandong Province foreign study or education abroad funded by the state project support
The advantages of considering toroidal cores less fundamental mode optical fibre and multicore super model optical fiber is closed, the present invention proposes a kind of less fundamental mode optical fibre of three toroidal cores,
Can increase effective area, reduce the nonlinear effect in optical fiber transmission, be optical fiber optics, fiber optic communication, optical-fiber wireless access and
The further investigation in the fields such as optical Information Processing provides important support.
The technical solution adopted by the present invention to solve the technical problems is：
The present invention proposes a kind of less fundamental mode optical fibre of three toroidal cores；Its cross section includes pure silicon dioxide matrix and three foldings
Penetrate the slightly larger cylindrical core of rate；Three cylindrical core sizes are identical, index distribution is identical, and adjacent spaces very little；Three annulus
In-core radius of circle is R1=R3=R5=5.25E-6m, exradius R2=R4=R6=1.05E-5m；In the cylindrical core of left side
Heart coordinate be (- 9.31E-6m, 0), upper right side cylindrical core centre coordinate be (9.31E-6m, 1.075E-5m), lower right side cylindrical core
Centre coordinate is (9.31E-6m, -1.075E-5m)；Outermost cladding diameter is 1.25E-4m；The refractive index of three cylindrical cores is
1.4517, the refractive index of pure silicon dioxide is 1.45；There is close coupling in fiber mode in three toroidal cores, and it is effective to form bigger
The super model of area, so as to reduce the nonlinear effect in optical fiber transmission；The Characteristics of modes of electromagnetic field is transmitted in optical fiber to be passed through
Change these toroid sizes, position and index distribution to change.
The beneficial effects of the invention are as follows：
There is close coupling in fiber mode in three toroidal cores, the super model of more large effective area is formed, so as to reduce optical fiber
Nonlinear effect in transmission；Make it in fields tools such as optical fiber optics, fiber optic communication, optical-fiber wireless access and optical Information Processings
There is broad prospect of application.
Description of the drawings
Fig. 1 is a kind of less fundamental mode optical fibre cross-sectional view of three toroidal cores of the present invention；The optical fiber is by pure dioxy on the whole
SiClx matrix and three refractive index it is slightly larger cylindrical core composition；Three cylindrical core sizes are identical, adjacent spaces very little；Three annulus
In-core radius of circle is R1=R3=R5=5.25E-6m, exradius R2=R4=R6=1.05E-5m；In the cylindrical core of left side
Heart coordinate be (- 9.31E-6m, 0), upper right side cylindrical core centre coordinate be (9.31E-6m, 1.075E-5m), lower right side cylindrical core
Centre coordinate is (9.31E-6m, -1.075E-5m)；Outermost cladding diameter is 1.25E-4m；The refractive index of three cylindrical cores is
1.4517, the refractive index of pure silicon dioxide is 1.45.
Fig. 2 (a) is the electric field distribution of less fundamental mode optical fibre linear polarization pattern LP01 super models a, and Fig. 2 (b) is less fundamental mode optical fibre linear polarization
The electric field distribution of pattern LP01 super models b；The two is degenerate mode, effective refractive index 1.45096.
Fig. 3 (a) is the electric field distribution of less fundamental mode optical fibre linear polarization pattern LP11 super models a, and Fig. 3 (b) is less fundamental mode optical fibre linear polarization
The electric field distribution of pattern LP11 super models b, the electric field that Fig. 3 (c) is less fundamental mode optical fibre linear polarization pattern LP11 super models c are distributed, Fig. 3 (d)
It is the electric field distribution of less fundamental mode optical fibre linear polarization pattern LP11 super models d；Above-mentioned four be degenerate mode, and effective refractive index is
1.45061；The a length of 1545nm of incident light wave in Fig. 2 and Fig. 3, the power of the incident optical electric field of equipotential line characterization, density is bigger, electric field
It is stronger；Arrow is direction of an electric field.
Specific embodiment
The present invention is further described with implementation below in conjunction with the accompanying drawings.
Fig. 1 is a kind of less fundamental mode optical fibre cross-sectional view of three toroidal cores of the present invention.The optical fiber is by pure dioxy on the whole
SiClx matrix and three refractive index it is slightly larger cylindrical core composition.Three cylindrical core sizes are identical, inner circle radius R1=R3=R5
=5.25E-6m, exradius R2=R4=R6=1.05E-5m；Left side cylindrical core centre coordinate is (- 9.31E-6m, 0),
Upper right side cylindrical core centre coordinate be (9.31E-6m, 1.075E-5m), lower right side cylindrical core centre coordinate for (9.31E-6m ,-
1.075E-5m)；Outermost cladding diameter is 1.25E-4m；The refractive index of three cylindrical cores is 1.4517, the refraction of pure silicon dioxide
Rate is 1.45；The Characteristics of modes that electromagnetic field is transmitted in optical fiber can be by changing these toroid sizes, position and index distribution
To change.
Fig. 2 (a) is the electric field distribution of less fundamental mode optical fibre linear polarization pattern LP01 super models a, and Fig. 2 (b) is less fundamental mode optical fibre linear polarization
The electric field distribution of pattern LP01 super models b；The two is degenerate mode, effective refractive index 1.45096.
Fig. 3 (a) is the electric field distribution of less fundamental mode optical fibre linear polarization pattern LP11 super models a, and Fig. 3 (b) is less fundamental mode optical fibre linear polarization
The electric field distribution of pattern LP11 super models b, the electric field that Fig. 3 (c) is less fundamental mode optical fibre linear polarization pattern LP11 super models c are distributed, Fig. 3 (d)
It is the electric field distribution of less fundamental mode optical fibre linear polarization pattern LP11 super models d；Above-mentioned four be degenerate mode, and effective refractive index is
1.45061；The a length of 1545nm of incident light wave in Fig. 2 and Fig. 3, the power of the incident optical electric field of equipotential line characterization, density is bigger, electric field
It is stronger；Arrow is direction of an electric field.From figures 2 and 3, it will be seen that three toroidal cores less fundamental mode optical fibres form the effective area ratio list of super model
The bigger of core less fundamental mode optical fibre can preferably reduce the nonlinear effect in optical fiber transmission, be optical fiber optics, fiber optic communication, optical fiber
The fields such as wireless access and optical Information Processing provide important support, have broad prospect of application.
Claims (1)
1. a kind of less fundamental mode optical fibre of three toroidal cores；Its cross section includes pure silicon dioxide matrix and three cylindrical cores；Three annulus
The size of core is identical, index distribution is identical；The inner circle radius of three cylindrical cores of the less fundamental mode optical fibre is R1=R3=R5=
5.25E-6m, exradius R2=R4=R6=1.05E-5m；Left side cylindrical core centre coordinate is (- 9.31E-6m, 0), right
Upside cylindrical core centre coordinate be (9.31E-6m, 1.075E-5m), lower right side cylindrical core centre coordinate for (9.31E-6m ,-
1.075E-5m)；Outermost cladding diameter is 1.25E-4m；The refractive index of three cylindrical cores is 1.4517, the refraction of pure silicon dioxide
Rate is 1.45.
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| CN201510742422.0A CN105372753B (en) | 2015-10-30 | 2015-10-30 | A kind of less fundamental mode optical fibre of three toroidal cores |
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| CN105372753A CN105372753A (en) | 2016-03-02 |
| CN105372753B true CN105372753B (en) | 2018-07-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106291803B (en) * | 2016-09-30 | 2019-06-18 | 华中科技大学 | A kind of microstructure cladding optical fiber of grade doping multicore and preparation method thereof |
| CN107621669B (en) * | 2017-09-08 | 2020-09-25 | 聊城大学 | Low-nonlinearity-coefficient few-mode optical fiber with depressed refractive index cladding |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698843A (en) * | 2013-12-18 | 2014-04-02 | 江苏大学 | Low-degeneracy few-mode fiber |
| CN103827708A (en) * | 2011-02-24 | 2014-05-28 | Ofs飞泰尔公司 | Graded-index few-mode fiber designs for spatial multiplexing |
| CN104345380A (en) * | 2014-08-07 | 2015-02-11 | 江苏大学 | Two-mode optical fiber |
| CN104714273A (en) * | 2015-03-31 | 2015-06-17 | 长飞光纤光缆股份有限公司 | Low-attenuation and few-mode fiber |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8693834B2 (en) * | 2011-08-15 | 2014-04-08 | Corning Incorporated | Few mode optical fibers for mode division multiplexing |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103827708A (en) * | 2011-02-24 | 2014-05-28 | Ofs飞泰尔公司 | Graded-index few-mode fiber designs for spatial multiplexing |
| CN103698843A (en) * | 2013-12-18 | 2014-04-02 | 江苏大学 | Low-degeneracy few-mode fiber |
| CN104345380A (en) * | 2014-08-07 | 2015-02-11 | 江苏大学 | Two-mode optical fiber |
| CN104714273A (en) * | 2015-03-31 | 2015-06-17 | 长飞光纤光缆股份有限公司 | Low-attenuation and few-mode fiber |
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