CN104730620B - A kind of hollow band gap photonic crystal fiber of low-loss - Google Patents
A kind of hollow band gap photonic crystal fiber of low-loss Download PDFInfo
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- CN104730620B CN104730620B CN201510063231.1A CN201510063231A CN104730620B CN 104730620 B CN104730620 B CN 104730620B CN 201510063231 A CN201510063231 A CN 201510063231A CN 104730620 B CN104730620 B CN 104730620B
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- band gap
- centre bore
- photonic crystal
- loss
- crystal fiber
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- 239000004038 photonic crystal Substances 0.000 title claims abstract description 37
- 239000000835 fiber Substances 0.000 title claims abstract description 34
- 239000003365 glass fiber Substances 0.000 claims abstract description 26
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000000758 substrate Substances 0.000 claims abstract description 15
- 239000011261 inert gas Substances 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims description 16
- 230000000875 corresponding Effects 0.000 claims description 11
- 229910052904 quartz Inorganic materials 0.000 claims description 9
- 239000010453 quartz Substances 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000001307 helium Substances 0.000 claims description 3
- 229910052734 helium Inorganic materials 0.000 claims description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium(0) Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims 1
- 238000004891 communication Methods 0.000 abstract description 3
- 210000001736 Capillaries Anatomy 0.000 description 9
- 239000011148 porous material Substances 0.000 description 6
- 230000023298 conjugation with cellular fusion Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000013011 mating Effects 0.000 description 4
- 230000003287 optical Effects 0.000 description 4
- 230000021037 unidirectional conjugation Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- 241000208340 Araliaceae Species 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 235000005035 ginseng Nutrition 0.000 description 2
- 235000008434 ginseng Nutrition 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 230000000051 modifying Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000000411 transmission spectrum Methods 0.000 description 2
- 230000003044 adaptive Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000002708 enhancing Effects 0.000 description 1
- 230000035485 pulse pressure Effects 0.000 description 1
- 102220076495 rs200649587 Human genes 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
Abstract
A kind of hollow band gap photonic crystal fiber of low-loss, it is related to optic communication and related transducer device technical field, it includes quartz glass substrate and the airport group for being set in quartz glass substrate and be distributed and run through along optical fiber axial direction whole optical fiber, the airport group includes a centre bore being located at the quartz glass substrate lower shaft heart, and be surrounded on around the centre bore and in the multilayer ring of regular hexagon setting, each layer of ring is rearranged by several edge holes respectively；The radius of the centre bore is more than the radius of edge hole；Inert gas is filled in centre bore, and air pressure is more than air pressure in edge hole in centre bore, the two air pressure ratio is 1.05~1.5.The present invention can effectively reduce the decaying of hollow band gap photonic crystal fiber, and decaying is less than 5dB/km, within optimal value is up to 1dB/km.
Description
Technical field
The present invention relates to optic communication and related transducer device technical fields, are specifically a kind of hollow band gap light of low-loss
Photonic crystal fiber.
Background technology
Photonic crystal fiber (PCF) has many unique and novel physical characteristics, these characteristics are conventional quartz single modes
Optical fiber is difficult or cannot achieve.Current photonic crystal fiber itself and Characteristics of Photonic Crystal Fiber are in optical communication, optical-fiber network
The problem in science such as application be all significant problem that countries in the world scientist pays close attention to, the research in this field in the world is just opened
Begin.In nonlinear optics research field, photonic crystal fiber can be utilized to generate supercontinum, soliton pulses, pulse pressure
Contracting, Self-phase modulation and Cross-phase Modulation, parametric oscillation and four-wave mixing etc..
Conventional quartz optical fiber is refractive-index-guiding type leaded light mechanism, and light is transmitted in silica core, when luminous power improves, meeting
Face the problems such as such as nonlinear effect enhancing, luminous power improve the quartz material damage brought and transmission loss caused to increase.
Hollow band gap photonic crystal fiber using air or vacuum due to, as transmission medium, avoiding the larger suction of quartz glass optical fiber
It receives and Rayleigh scattering loss passes through simultaneously because light transmits in the hollow of hollow band gap photonic crystal fiber when transmitting
Medium is air, and for the quartz medium passed through compared to conventional quartz optical fiber, the transmission of this optical signal can avoid dielectric material
Influence, such as material dispersion, external environment interference shadow etc..Therefore, the photonic crystal fiber of hollow band gap has optical transport
It is small to distort, is even undistorted；To extraneous temperature-insensitive；It is insensitive to external world's irradiation to wait plurality of properties, it is passed in high power laser
It is defeated, optical signal is undistorted transmission and space flight with the fields such as optical fibre gyro have very huge application value.
But due to hollow band gap photonic crystal fiber there is also design and development technology many problems,
The Reduction Level of 1550nm wavelength is also in several dB/km magnitudes even level above, big, band gap transmission wave band reality that there are fibre losses
The problems such as existing difficult, therefore slowly fail the optical fibre device achievement in research based on its preparation for having practical.
Invention content
In view of the deficiencies in the prior art, the purpose of the present invention is to provide a kind of hollow bandgap photonic of low-loss is brilliant
Body optical fiber, the present invention can effectively reduce the decaying of hollow band gap photonic crystal fiber, and decaying is less than 5dB/km, and optimal value can
Up within 1dB/km.
To achieve the above objectives, the technical solution adopted by the present invention is that：A kind of hollow band gap photonic crystal fiber of low-loss,
Including quartz glass substrate and it is set in quartz glass substrate and is distributed along optical fiber axial direction and through the air of whole optical fiber
Hole group, the airport group include a centre bore being located at the quartz glass substrate lower shaft heart, and are surrounded on centre bore week
The multilayer ring of regular hexagon setting is enclosed and is in, each layer of ring is rearranged by several edge holes respectively；The centre bore
Radius is more than the radius of edge hole；It is filled with inert gas in centre bore, and air pressure is more than air pressure in edge hole in centre bore, two
Person's air pressure ratio is 1.05~1.5.
Based on the above technical solution, the inert gas is helium or nitrogen.
Based on the above technical solution, the quantity of edge hole is to be multiplied by 6 after the ring number of plies adds 1 in each layer of ring.
Based on the above technical solution, the number of plies of the ring is 5 to 11 layers, and corresponding band gap transmission wavelength band is
1200nm~1600nm.
Based on the above technical solution, corresponding band gap transmission wavelength band is 1500nm~1560nm.
Based on the above technical solution, the value range of the center pore radius is 4 μm~8 μm；Edge pore radius
Value range be 1.3 μm~2.6 μm.
Based on the above technical solution, the radius of the centre bore is 3 times of edge pore radius.
Based on the above technical solution, the duty ratio of the centre bore is 90%~98%；The duty ratio of edge hole
It is 85%~95%.
Based on the above technical solution, further include the covering and coating being coated on successively on the outside of quartz glass substrate,
Wherein a diameter of 80 μm~135 μm of covering, a diameter of 165 μm~250 μm of coating.
The beneficial effects of the present invention are：
1, the present invention passes through tune by the way that the structure of 5 to 11 layers of ring is arranged in conjunction with the centre bore and edge hole of special ratios
Center hole size and edge hole size and mutual spacing are saved, the low damage of centre bore leaded light transmitted can be optimized
Wave-length coverage is depleted, transmits wavelength band to form suitable low-loss band gap, therefore can effectively reduce hollow band gap light
The decaying of photonic crystal fiber, decaying is less than 5dB/km, within optimal value is up to 1dB/km.
2, inert gas and different pressure control of the present invention by relatively small molecular weight, thus by the expansion phase ratio of centre bore
The bigger of edge hole, not only has compressed the thickness of centre bore surrounding quartz wall, and reduces the inner wall roughness of centre bore, because
This can effectively reduce the decaying of hollow band gap photonic crystal fiber.
Description of the drawings
Fig. 1 is the structural schematic diagram of the hollow band gap photonic crystal fiber of low-loss in the present invention；
Fig. 2 is the arrangement schematic diagram for the airport group for having the ring that is of five storeys in the embodiment of the present invention；
Fig. 3 is the intrinsic spacing schematic diagram of centre bore in the present invention；
Fig. 4 is the molding control schematic diagram of the hollow band gap photonic crystal fiber of low-loss in the present invention；
Fig. 5 is the typical bandgap transmission loss collection of illustrative plates of the hollow band gap photonic crystal fiber of low-loss in the present invention.
Reference numeral：
1- centre bores；2- edge holes；3- coverings；4- coatings.
Specific implementation mode
Name definition：
Intrinsic spacing：Refer to two with size airport and it is mating around quartz layer mutually get together when, air
Spacing between hole.As long as the spacing is the intrinsic spacing described when two airports and mating quartz layer are got together, thus it is fixed
Justice is intrinsic spacing.
Invention is further described in detail with reference to the accompanying drawings and embodiments.
It is shown in Figure 1, a kind of hollow band gap photonic crystal fiber of low-loss, including quartz glass substrate, coat successively
Covering 3 and coating 4 on the outside of quartz glass substrate are set in quartz glass substrate and are distributed along optical fiber axial direction and through whole
The airport group of root optical fiber.Wherein a diameter of 80 μm~135 μm of covering 3, a diameter of 165 μm~250 μm of coating 4.
Shown in Figure 2, the airport group includes a centre bore 1 being located at the quartz glass substrate lower shaft heart, and
It is surrounded on around the centre bore 1 and in the multilayer ring of regular hexagon setting, it is preferred that the number of plies of the ring is 5 to 11 layers.
Each layer of ring is rearranged by several edge holes 2 respectively；The radius of the centre bore 1 is more than the radius of edge hole 2.Centre bore
Inert gas is filled in 1, and air pressure is more than air pressure in edge hole 2 in centre bore 1, the two air pressure ratio is 1.05~1.5.Often
The quantity of edge hole 2 is to be multiplied by 6 after the ring number of plies adds 1 in one layer of ring.
Specifically, closely the 1st layer of ring of centre bore is defined as n1, so successively outward, gradually there are n2, n3, n4, n5.
Quantity N1=(1+1) * 6=12 of 1st layer of ring airport, that is, have the edge hole 2 of 12 reduced sizes；2nd layer of ring air
Quantity N2=(2+1) the * 6=18 in hole；Quantity N3=(3+1) the * 6=24 of 3rd layer of ring airport；4th layer of ring airport
Quantity N4=(4+1) * 6=30；Quantity N5=(5+1) the * 6=36 of 5th layer of ring airport.The number of turns of ring is generally 5
Layer ring or 11 layers of ring, corresponding band gap transmission wavelength band is 1200nm~1600nm, it is preferred that corresponding band gap transmits wave band
Range includes at least 1500nm~1560nm；When ring number is between 5~11, it is possibility to have corresponding wave band bandgap structure, but
Transmission wavelength band has difference, and the decaying of optical fiber is less than 5dB/km, within optimal value is up to 1dB/km.
Shown in Figure 3, if 1 radius of centre bore is r1,2 radius of edge hole is r2, the spacing of each adjacent two edge hole 2
For D20, therefore the wall thickness w2=D20-2*r2 of edge hole 2 to each other；The duty ratio △ 2=2*r2/D20 of edge hole 2；If the 1st
The spacing of two edge holes 2 symmetrical centered on centre bore is D11 in layer ring, obtains the intrinsic spacing of centre bore 1
D10=D11-D20；The duty ratio △ 1=2*r1/D10 of centre bore 1；Wall thickness w1=between centre bore 1 and adjacent edge marginal pore 2
(D10-2*r1+w2)/2；The value range of 1 radius of the centre bore is 4 μm~8 μm；The value range of 2 radius of edge hole is
1.3 μm~2.6 μm.Preferably, the radius of the centre bore 1 is 3 times of 2 radius of edge hole.The duty ratio of the centre bore 1 is
90%~98%；The duty ratio of edge hole 2 is 85%~95%.
The preparation method of the hollow band gap photonic crystal fiber of low-loss of the present invention is：
Certain amount is polymerize bunchy by step S1. with the small capillary of size；
Small capillary is enclosed at the big capillary substitution center two that step S2. selections and the small capillary of the size match；
Step S3. fixes small bundle of capillary tubes one end after excessive capillary replaces with mating quartzy tail pipe, another
End seal is closed, and capillary intermediate is formed；
Step S4. fills in the capillary intermediate in mating casing, and the quartzy tail pipe connects pressure control
System forms photon crystal optical fiber preformed rod；It is shown in Figure 4, in practical forming process, to region T1 residing for centre bore 1
It is controlled respectively with the residing region T2 of 1~N layers of ring.T1 uses air pressure for P1, and T2 uses air pressure for P2, and P1 is more than
P2, ratio range are 1.05~1.5.To make the swollen of the centre bore formed by large-size airport in optical fiber forming process
Swollen ratio is more than the expansion rate for the outer layer ring being made of reduced size airport.
Photon crystal optical fiber preformed rod is placed on wire-drawer-tower by step S5., in conjunction with pneumatic control system, is drawn into hollow
Bandgap photonic crystal optical fiber, small capillary form the small airport of hollow band gap photonic crystal fiber, and big capillary forms hollow
The big airport of bandgap photonic crystal optical fiber.Wherein, it is passed through in center air hole in high-temperature fusion with this molding optical fiber
The inactive gas of relatively small molecular weight material, such as inert gas helium, nitrogen reduce center air by its small molecule characteristic
Inside roughness of the hole when high-temperature fusion is molded.
The hollow band gap photonic crystal fiber of low-loss of the present invention can realize that the broadband band gap near 1550nm is transmitted, together
When, it, can be by the photonic crystal of the hollow band gap of the structure in conjunction with the different adaptive barometric pressure controls of centre bore 1 and edge hole 2
The 1550nm adjustable attenuations of optical fiber are to 5dB/km hereinafter, optimal value can reach within 1dB/km.
Below by specific example, the invention will be further described.
Embodiment when 1 airport ring number of table is 5 layers of ring
Ginseng is shown in Table 1, and when airport ring number is 5 layers of ring, has carried out the implementation of 5 kinds of optical fiber.It can from embodiment
To see, when being 5 layers to the ring number of plies, universal band gap transmission attenuation is respectively less than 5dB/km, bandgap range include 1500nm~
1560nm, optimized attenuation can reach within 1dB/km, and corresponding most broad-band gap transmission range is in 1200nm~1600m.
Embodiment when 2 airport ring number of table is 11 layers of ring
Ginseng is shown in Table 2, and when airport ring number is 11 layers of ring, has carried out the implementation of 5 kinds of optical fiber.It can from embodiment
To see, when being 11 layers to the ring number of plies, universal band gap transmission attenuation is near 1dB/km or is less than the value, and bandgap range is equal
Including 1500nm~1560nm, and while being 5 compared with ring number, wants wide；Optimized attenuation can reach within 1dB/km, corresponding most broadband
Gap transmission range is in 1200nm~1600m.Its typical bandgap transmission spectrum is shown in Figure 5, it is illustrated that abscissa is wavelength, ordinate
For the corresponding transmission light transmittance of transmission spectrum of the different wave length after hollow band gap photonic crystal fiber, the figure 1200~
1600nm wave bands have preferable light transmittance, wherein 1350~1400nm in by airport steam influenced, light transmittance is relatively low.
When airport ring number is 7 layers of ring, the big air pore radius r1 in center is 7.0 μm, and smaller air pore radius is
2.31 μm, △ 1 is that 98%, △ 2 is 95%, and cladding diameter D11 is 130 microns, and coating diameter D12 is 250 microns, using P1/
P2 is 1.3, and for corresponding bandgap range in 1420nm~1560nm, minimum attenuation can reach 1.8dB/km.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as the protection of the present invention
Within the scope of.The content not being described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (9)
1. a kind of hollow band gap photonic crystal fiber of low-loss, including quartz glass substrate and it is set in quartz glass substrate
And the airport group of whole optical fiber is distributed and run through along optical fiber axial direction, it is characterised in that：The airport group includes being located at quartz
A centre bore (1) at substrate of glass axle center, and be surrounded on around the centre bore (1) and in the multilayer of regular hexagon setting
Ring, each layer of ring are rearranged by several edge holes (2) respectively；The radius of the centre bore (1) is more than edge hole (2)
Radius；Inert gas is filled in centre bore (1), and centre bore (1) interior air pressure is more than edge hole (2) interior air pressure, the two air pressure
Ratio is 1.05~1.5.
2. the hollow band gap photonic crystal fiber of low-loss as described in claim 1, it is characterised in that：The inert gas is helium
Gas or nitrogen.
3. the hollow band gap photonic crystal fiber of low-loss as described in claim 1, it is characterised in that：Edge in each layer of ring
The quantity in hole (2) is to be multiplied by 6 after the ring number of plies adds 1.
4. the hollow band gap photonic crystal fiber of low-loss as described in claim 1, it is characterised in that：The number of plies of the ring is
5 to 11 layers, corresponding band gap transmission wavelength band is 1200nm~1600nm.
5. the hollow band gap photonic crystal fiber of low-loss as claimed in claim 4, it is characterised in that：Corresponding band gap transmits wave band
Ranging from 1500nm~1560nm.
6. the hollow band gap photonic crystal fiber of low-loss as described in claim 1, it is characterised in that：The centre bore (1) half
The value range of diameter is 4 μm~8 μm；The value range of edge hole (2) radius is 1.3 μm~2.6 μm.
7. the hollow band gap photonic crystal fiber of low-loss as described in claim 1, it is characterised in that：The centre bore (1)
Radius is 3 times of edge hole (2) radius.
8. the hollow band gap photonic crystal fiber of low-loss as described in claim 1, it is characterised in that：The centre bore (1)
Duty ratio is 90%~98%；The duty ratio of edge hole (2) is 85%~95%.
9. the hollow band gap photonic crystal fiber of low-loss as described in claim 1, it is characterised in that：Further include being coated on successively
Covering (3) on the outside of quartz glass substrate and coating (4), wherein a diameter of 80 μm~135 μm of covering (3), coating (4) it is straight
Diameter is 165 μm~250 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510063231.1A CN104730620B (en) | 2015-02-06 | A kind of hollow band gap photonic crystal fiber of low-loss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510063231.1A CN104730620B (en) | 2015-02-06 | A kind of hollow band gap photonic crystal fiber of low-loss |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104730620A CN104730620A (en) | 2015-06-24 |
| CN104730620B true CN104730620B (en) | 2018-08-31 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1564029A (en) * | 2004-03-18 | 2005-01-12 | 上海交通大学 | Wide band-gap air counducting photon band-gap optical fiber |
| CN1673138A (en) * | 2005-03-25 | 2005-09-28 | 中国科学院上海光学精密机械研究所 | Preparation method of photonic crystal optical fiber preform |
| CN1769229A (en) * | 2004-09-24 | 2006-05-10 | 三星电子株式会社 | Apparatus and method for fabricating photonic crystral optical fiber preform |
| CN102320733A (en) * | 2011-06-13 | 2012-01-18 | 南京春辉科技实业有限公司 | Photonic crystal fiber prefabricated bar and method for manufacturing photonic crystal fiber |
| CN104035205A (en) * | 2014-06-17 | 2014-09-10 | 天津理工大学 | High power pulse compression device based on helium-filled kagome optical fiber |
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1564029A (en) * | 2004-03-18 | 2005-01-12 | 上海交通大学 | Wide band-gap air counducting photon band-gap optical fiber |
| CN1769229A (en) * | 2004-09-24 | 2006-05-10 | 三星电子株式会社 | Apparatus and method for fabricating photonic crystral optical fiber preform |
| CN1673138A (en) * | 2005-03-25 | 2005-09-28 | 中国科学院上海光学精密机械研究所 | Preparation method of photonic crystal optical fiber preform |
| CN102320733A (en) * | 2011-06-13 | 2012-01-18 | 南京春辉科技实业有限公司 | Photonic crystal fiber prefabricated bar and method for manufacturing photonic crystal fiber |
| CN104035205A (en) * | 2014-06-17 | 2014-09-10 | 天津理工大学 | High power pulse compression device based on helium-filled kagome optical fiber |
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Inventor after: Luo Wenyong Inventor after: Zhao Zisen Inventor after: Li Shiyu Inventor after: Liu Zhijian Inventor after: Li Wei Inventor after: Zhao Lei Inventor after: Hu Fuming Inventor before: Luo Wenyong Inventor before: Li Shiyu Inventor before: Liu Zhijian Inventor before: Li Wei Inventor before: Zhao Lei Inventor before: Hu Fuming |
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