CN1564029A - Wide band-gap air counducting photon band-gap optical fiber - Google Patents
Wide band-gap air counducting photon band-gap optical fiber Download PDFInfo
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- CN1564029A CN1564029A CN 200410017013 CN200410017013A CN1564029A CN 1564029 A CN1564029 A CN 1564029A CN 200410017013 CN200410017013 CN 200410017013 CN 200410017013 A CN200410017013 A CN 200410017013A CN 1564029 A CN1564029 A CN 1564029A
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Abstract
The fiber consists of core and clad. Fiber core is a large circular air hole. Clad is composed of small air holes in multiple layers arranged in hexagon periodically. Number of the said layers is 2-10 diameter of the hole is 12.50-19.00 micro. Backgroud material is sulfide-based glass. Since light frequency is in range of forbidden band, incident light beam cannot be traveled in transverse lateral, and has to travel in longitudinal direction so as to realize transferring purpose. New structure and background material are adopted in the invention to transfer light through air, possessing features of low dissipation, low nonlinear coefficient and wide photon band gap, and being able to transfer high signal power and larger information capacity.
Description
Technical field
The present invention relates to a kind of broad-band gap air leaded light photon band-gap optical fiber, can transmit higher signal power and bigger information capacity, be applicable to fiber optic communication field.
Background technology
At present, the used Transmission Fibers of fiber optic communication field is based on the total internal reflection principle leaded light, and optical fiber is made of refractive index higher fibre core and the lower covering of refractive index.Because light is propagated in fibre core, the matrix of forming fibre core has factors such as intrinsic absorption, optical non-linear effect, material dispersion and Rayleigh scattering to cause the transmission system performance to descend to light.Wherein intrinsic absorption and Rayleigh scattering have increased loss, need a level chain image intensifer to extend transmission distance, so system cost and cost rising; And material dispersion causes the signal pulse broadening, makes between the signal bit overlappingly, interferes between generated code, has also limited transmission range.Optical non-linear effect such as stimulated Raman scattering, Brillouin scattering, four-wave mixing, from phase modulation (PM) and cross-phase modulation the different frequency interchannel is produced to crosstalk, error rate of system is risen, system performance descends; Interchannel keeps a determining deviation, and bit rate is high more, and spacing is big more, therefore, has restricted further developing of fiber-optic communications traffic distance and power system capacity based on the intrinsic property of the traditional fiber of total internal reflection.
In recent years, photon band-gap optical fiber is subjected to experts and scholars' great attention with its unique advantage.As everyone knows, when electronics was propagated in the cycle potential field, the Bragg diffraction that can be subjected to the cycle potential field owing to electron waves formed band structure, may have band gap between band and the band.If the energy of electron waves drops in the band gap, propagation is forbidden.In fact, no matter any ripple as long as be subjected to periodic modulation, all has band structure, also all band gap might appear.The ripple that energy drops in the band gap can not be propagated, and electromagnetic wave or light wave are no exception, and the photonic crystal fiber with bandgap structure is called photon band-gap optical fiber.Photon band-gap optical fiber characteristics different with traditional fiber are exactly that it utilizes the air leaded light.Its xsect is made of fibre core and covering, its fibre core is made up of big airport, and covering is that the little airport of the multilayer of periodic arrangement is formed, owing to have bandgap structure, the light signal horizontal transmission that is positioned at band gap is forbidden, can only propagate along defect state (intermediate air hole).Because photon band-gap optical fiber utilizes the air leaded light, has the unexistent characteristic of traditional fiber, as low-loss and low nonlinearity coefficient and low chromatic dispersion, can transmit very high signal power.The shape, size, arrangement mode of the shape in optical fiber intermediate air hole and size, covering airport and determined bandgap structure with the difference of the refractive index of background material.Therefore band gap wide more (or big more), the spectral range that can axially propagate along the intermediate air hole is big more, and is can the channel transmitted number many more.
At present based on the structure of the photon band-gap optical fiber of silicon dioxide and characteristic just in broad research, this has all been done a lot of researchs as Bath university and Corning Incorporated, the fibre core airport of its use is shaped as hexangle type, covering airport being arranged as around the fibre core is hexagonal, and result of study shows that its band gap is narrower.Along with the day by day demand of user to bandwidth, optical fiber communication develops towards the direction of two-forty high bandwidth.For this reason, scientists is seeking a kind of high-index material and new optical fiber structure is constructed the photon band-gap optical fiber of broad-band gap, and the broad-band gap photon band-gap optical fiber becomes the theme of photonic crystal fiber research.
Summary of the invention
The objective of the invention is at above-mentioned to propose a kind of more photon band-gap optical fiber of broad-band gap that has, can transmit bigger information capacity, satisfy actual needs based on the narrower deficiency of the photon band-gap optical fiber band gap of silicon dioxide.
In order to realize such purpose, the photon band-gap optical fiber of the present invention's design is made of fibre core and covering, its fibre core is that circular big airport is formed by the cross section, covering is that periodic arrangement becomes the little airport of hexagonal multilayer to form, the number of plies of its airport is between the 2-10 layer, the filling rate of covering airport is 70%, and the intermediate air aperture is between 12.50 to 19.00 μ m.The background material of air leaded light photon band-gap optical fiber of the present invention adopts the sulfide base glass with high index of refraction.
When light after fiber end face incident can not horizontal transmission because light frequency is positioned at the forbidden band scope that is made of the covering airport, and can only be along the airport longitudinal propagation of centre, thus realize the purpose of transmission.
Photon band-gap optical fiber of the present invention has adopted new structure and background material, utilize the air leaded light, have low-loss and low nonlinearity coefficient and wide photonic band-gap, its photonic band-gap is three times of silicon dioxide photon band-gap optical fiber, can transmit very high signal power and bigger information capacity, overcome the shortcoming of conventional transmission fiber core absorption coefficient height and nonlinear effect, overcome the shortcoming that silicon dioxide photon band-gap optical fiber band gap is narrower, transmission capacity is little simultaneously again.
Description of drawings
Fig. 1 is a broad-band gap air leaded light photon band-gap optical fiber cross-sectional structure synoptic diagram of the present invention.
Among Fig. 1,1 is the fibre core airport, and 2 is the covering airport, and 3 is background material.
Fig. 2 is a photon band-gap optical fiber size synoptic diagram of the present invention.
Fig. 3 is the band gap diagram of photon band-gap optical fiber.
Among Fig. 3, being the band gap diagram of the As-Se photon band-gap optical fiber of 12.690 μ m for intermediate air of the present invention aperture (a), (b) is the band gap diagram based on the photon band-gap optical fiber of silicon dioxide.
Fig. 4 for the band gap of As-Se photon band-gap optical fiber of the present invention with intermediate air varying aperture figure.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is further described.
The broad-band gap air leaded light photon band-gap optical fiber structure of the present invention's design as shown in Figure 1, constitute by fibre core and covering, its fibre core is made up of the big airport of circle, covering outside fibre core airport 1 becomes the little airport of hexagonal multilayer to form by periodic arrangement, the number of plies of covering airport 2 is between the 2-10 layer, the filling rate of covering airport 2 is 70%, the air aperture of middle fibre core airport 1 is between 12.50 to 19.00 μ m, and the background material 3 of photon band-gap optical fiber adopts the sulfide base glass with high index of refraction.
When light after fiber end face incident can not horizontal transmission because light frequency is positioned at the forbidden band scope that is made of covering airport 2, and can only be along fibre core airport 1 longitudinal propagation of centre, thus realize the purpose of transmission.
In an embodiment of the present invention, the background material of photon band-gap optical fiber is the As-Se chalcogenide glass, and refractive index is 2.8, air refraction is 1.0 in the airport, the filling rate of airport in covering is fixed on 70%, and the covering number of plies is 5 layers, and free space wavelength is 1.55 μ m.Pore size with fibre core airport 1 in the experiment increases from 4.23 μ m to 21.17 μ m with 2% size, carries out different calculating.
Embodiment uses full vector plane-wave development method to calculate the band gap properties of photon band-gap optical fiber of the present invention.Result of calculation as shown in Figure 3 and Figure 4.Fig. 3 shows that when fibre core airport 1 was 12.75 μ m, band gap was about 6.0, and the band gap of silicon dioxide is about 2.0, so the band gap of optical fiber of the present invention is 3 times of the silicon dioxide photon band-gap optical fiber.Fig. 4 further shows, when fibre core airport 1 when changing between 12.50 to the 19.00 μ m, band gap variation is very little.Therefore, when the intermediate air aperture of photon band-gap optical fiber of the present invention during at 12.50 to 19.00 mu m ranges, its band gap is about 3 times of silicon-dioxide-substrate photon band-gap optical fiber band gap.
Therefore, photon band-gap optical fiber of the present invention has wideer photonic band-gap than silicon-dioxide-substrate photon band-gap optical fiber, can transmit bigger information capacity.
Claims (1)
1, a kind of broad-band gap air leaded light photon band-gap optical fiber, it is characterized in that constituting by fibre core and covering, its fibre core is made up of the big airport of circle, covering outside fibre core airport (1) becomes the little airport of hexagonal multilayer to form by periodic arrangement, the number of plies of covering airport (2) is 2～10 layers, the filling rate of covering airport (2) is 70%, the air aperture of middle fibre core airport (1) is 12.50 μ m～19.00 μ m, and the background material of photon band-gap optical fiber (3) adopts sulfide base glass.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200410017013 CN1232843C (en) | 2004-03-18 | 2004-03-18 | Wide band-gap air counducting photon band-gap optical fiber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200410017013 CN1232843C (en) | 2004-03-18 | 2004-03-18 | Wide band-gap air counducting photon band-gap optical fiber |
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| CN1564029A true CN1564029A (en) | 2005-01-12 |
| CN1232843C CN1232843C (en) | 2005-12-21 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100456061C (en) * | 2005-04-22 | 2009-01-28 | 南开大学 | Air conducting double-core photon band gap optical fiber |
| CN104730620A (en) * | 2015-02-06 | 2015-06-24 | 烽火通信科技股份有限公司 | Low-loss hollow band gap pohotonic crystal fiber |
| CN108459370A (en) * | 2018-03-09 | 2018-08-28 | 华南理工大学 | It is a kind of using quartz glass as matrix photon band gap in dirac point photonic crystal fiber |
| CN104730620B (en) * | 2015-02-06 | 2018-08-31 | 烽火通信科技股份有限公司 | A kind of hollow band gap photonic crystal fiber of low-loss |
| CN109343171A (en) * | 2018-11-29 | 2019-02-15 | 中国地质大学（武汉） | A kind of ZBLAN fluoride ultraflattened dispersion compensation photonic crystal fiber |
| CN109445020A (en) * | 2018-12-13 | 2019-03-08 | 云南电网有限责任公司电力科学研究院 | One kind being used for SF6Gas and its optical fiber and preparation method of decomposition components detection |
| CN110244403A (en) * | 2019-05-17 | 2019-09-17 | 清华大学 | Photonic crystal chirp bragg grating pulse stretcher |
| CN112859235A (en) * | 2021-01-14 | 2021-05-28 | 南开大学 | Hollow-core micro-structure optical fiber with angular mode selectivity |
| CN115291319A (en) * | 2022-08-12 | 2022-11-04 | 西安邮电大学 | Photonic crystal fiber |
-
2004
- 2004-03-18 CN CN 200410017013 patent/CN1232843C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100456061C (en) * | 2005-04-22 | 2009-01-28 | 南开大学 | Air conducting double-core photon band gap optical fiber |
| CN104730620A (en) * | 2015-02-06 | 2015-06-24 | 烽火通信科技股份有限公司 | Low-loss hollow band gap pohotonic crystal fiber |
| CN104730620B (en) * | 2015-02-06 | 2018-08-31 | 烽火通信科技股份有限公司 | A kind of hollow band gap photonic crystal fiber of low-loss |
| CN108459370A (en) * | 2018-03-09 | 2018-08-28 | 华南理工大学 | It is a kind of using quartz glass as matrix photon band gap in dirac point photonic crystal fiber |
| CN109343171A (en) * | 2018-11-29 | 2019-02-15 | 中国地质大学（武汉） | A kind of ZBLAN fluoride ultraflattened dispersion compensation photonic crystal fiber |
| CN109343171B (en) * | 2018-11-29 | 2024-06-04 | 中国地质大学（武汉） | ZBLAN fluoride ultra-flat dispersion compensation photonic crystal fiber |
| CN109445020A (en) * | 2018-12-13 | 2019-03-08 | 云南电网有限责任公司电力科学研究院 | One kind being used for SF6Gas and its optical fiber and preparation method of decomposition components detection |
| CN109445020B (en) * | 2018-12-13 | 2020-05-05 | 云南电网有限责任公司电力科学研究院 | For SF6Optical fiber for detecting gas and its decomposition component and its preparation method |
| CN110244403A (en) * | 2019-05-17 | 2019-09-17 | 清华大学 | Photonic crystal chirp bragg grating pulse stretcher |
| CN112859235A (en) * | 2021-01-14 | 2021-05-28 | 南开大学 | Hollow-core micro-structure optical fiber with angular mode selectivity |
| CN115291319A (en) * | 2022-08-12 | 2022-11-04 | 西安邮电大学 | Photonic crystal fiber |
| CN115291319B (en) * | 2022-08-12 | 2024-03-26 | 西安邮电大学 | Photonic crystal fiber |
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| Publication number | Publication date |
|---|---|
| CN1232843C (en) | 2005-12-21 |
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