CN105842779A - Erbium-doped photonic crystal fiber - Google Patents
Erbium-doped photonic crystal fiber Download PDFInfo
- Publication number
- CN105842779A CN105842779A CN201610392053.1A CN201610392053A CN105842779A CN 105842779 A CN105842779 A CN 105842779A CN 201610392053 A CN201610392053 A CN 201610392053A CN 105842779 A CN105842779 A CN 105842779A
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- Prior art keywords
- photonic crystal
- doped
- layer
- crystal fiber
- ring
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Classifications
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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
- G02B6/02295—Microstructured optical fibre
- G02B6/023—Microstructured optical fibre having different index layers arranged around the core for guiding light by reflection, i.e. 1D crystal, e.g. omniguide
-
- 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
-
- 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
- G02B6/036—Optical fibres with cladding with or without a coating core or cladding comprising multiple layers
Abstract
The invention discloses an erbium-doped photonic crystal fiber and belongs to the photonic crystal fiber field. The erbium-doped photonic crystal fiber includes a quartz fiber core, an air hole layer, a quartz cladding layer and a coating which are sequentially distributed from inside to outside; a plurality of air holes are formed in the air hole layer; the air holes are all distributed along the axial direction of the fiber and are arranged throughout the entire fiber; the air holes are arranged to form a plurality of rings; at least five rings are formed; the size of air holes in each ring is identical; the air holes in each ring are hexagonally arranged with the quartz fiber core adopted as a center; the number of air holes in each ring is equal to the product of the serial number of the corresponding ring and 6; the quartz fiber core includes a doped core layer; and the doped core layer is doped with erbium ions and praseodymium ions. The erbium-doped photonic crystal fiber has excellent radiation resistance and can meet application requirements of the fluorescent light source of an aerospace optical fiber gyroscope and an erbium-doped fiber amplifier (EDFA) for complex environment under special environments.
Description
Technical field
The present invention relates to photonic crystal fiber field, be specifically related to a kind of er-doped photonic crystal light
Fine.
Background technology
Under severe nuclear radiation environment, the transmission of optical fiber information is had the biggest by the irradiation damage of optical fiber
Impact, particularly in high power pulse radiation field, the transient state induced loss of optical fiber may be up to thousands of
dB；Long-term irradiation accumulation under low dose rate environment, also can produce bigger permanent damage.
For optical fiber, when wherein containing the coloring ion such as germanium ion, aluminium ion, at gamma-rays
Irradiation under, in optical fiber, the own electrons of part is captured by these coloring ions, thus at light
Fibre is formed colour center, forms new absorption band, cause the wave band at visible ray that bigger damage occurs
Consumption, not even printing opacity.For Er-doped fiber, due to the internal doping of the fibre core of Er-doped fiber
There is coloring ion, be will be apparent from by fibre loss after irradiation, it is therefore desirable to carry out targetedly
The techniques such as doping process, new irradiation resistant fiber structure design, drawing process, predispersed fiber irradiation
Research in terms of means.
Photonic crystal fiber has structure design characteristics flexibly, by entering photonic crystal fiber
The structure design that row is certain, it is possible to achieve good radiation-resisting performance.People study various one after another
The radiation-resisting performance of photonic crystal fiber and the characteristic of Er-doped fiber are combined by method, are formed
There is the er-doped photonic crystal fiber of radiation-resisting performance.But, existing er-doped photonic crystal light
Fine anti-radiation performance is poor, it is impossible to meet the space flight fluorescence light source of optical fibre gyro, complicated ring
Application demand under the special environments such as the erbium-doped optical fiber amplifier EDFA in border.
Summary of the invention
The invention aims to overcome the deficiency of above-mentioned background technology, it is provided that a kind of er-doped
Photonic crystal fiber, this er-doped photonic crystal fiber has excellent anti-radiation performance, it is possible to
Meet the space flight fluorescence light source of optical fibre gyro, the erbium-doped optical fiber amplifier EDFA of complex environment
Deng the application demand under special environment.
The present invention provides a kind of er-doped photonic crystal fiber, including be arranged in order from the inside to the outside
Silica core, have several airports air aperture layer, quartz surrounding layer, coating, institute
Stating airport all along optical fiber axial distribution and through whole optical fiber, the arrangement of described airport is formed
Multilamellar ring, the number of plies of described ring is at least 5 layers, and the airport size in every layer of ring is equal
Identical, the airport in every layer of ring, all centered by silica core, arranges in regular hexagon,
The quantity of the airport in every layer of ring=ring number of plies * 6；Described silica core includes the core that adulterates
Layer, described doping sandwich layer is mixed with erbium ion, praseodymium ion.
On the basis of technique scheme, described silica core also includes fluorine doped covering, institute
State fluorine doped covering and be coated on the outside of described doping sandwich layer.
On the basis of technique scheme, also mixed with a certain amount of boron in described doping sandwich layer
Ion.
On the basis of technique scheme, the dutycycle of described air aperture layer hollow pore is
25%～40%.
On the basis of technique scheme, described fluorine doped covering is relative with quartz surrounding layer
Refractivity is-0.0%～-1.0%.
On the basis of technique scheme, the ring number of plies in described air aperture layer is 5～9
Layer.
On the basis of technique scheme, the ring number of plies in described air aperture layer is 7
Layer.
On the basis of technique scheme, the spacing of two adjacent described airports is
3.0 μm～6.0 μm.
On the basis of technique scheme, the internal diameter of described airport is
1.0 μm～4.0 μm.
On the basis of technique scheme, described doping sandwich layer a diameter of
3.0 μm～8.0 μm.
Compared with prior art, advantages of the present invention is as follows:
(1) present invention makes full use of the feature of structure flexible design of er-doped photonic crystal fiber,
The structure of reasonably optimizing air aperture layer, controls the ring number of plies of airport, effectively realizes photon brilliant
The radiation-resisting performance of body optical fiber；Introduce praseodymium ion at the fine layer of doping to be co-doped with erbium ion simultaneously, enter
One step improves the radiation-resisting performance of optical fiber.This er-doped photonic crystal fiber has excellent Flouride-resistani acid phesphatase
Characteristic, under conditions of irradiation accumulated dose is 100Krad, this er-doped photonic crystal fiber exists
Radiation induced loss value added under 1200nm wavelength is less than 0.5dB/m, it is possible to meet space flight
With the fluorescence light source of optical fibre gyro, the Special Ring such as erbium-doped optical fiber amplifier EDFA of complex environment
Application demand under border.
(2) the fine layer of doping is coated with fluorine doped covering, and the fluorion in fluorine doped covering is on the one hand
Reduce the refractive index of covering, be conducive to the logical light of total reflection, be on the other hand also beneficial to the anti-of optical fiber
Radiation Characteristics.
(3) fibre core of this er-doped photonic crystal fiber can also mix boron ion simultaneously, it is possible to
Resist owing to introducing praseodymium ion and the effects such as darkening in the case of the reunion that brings and power ascension,
Thus improve the service behaviour of erbium doped fiber laser based on er-doped photonic crystal fiber.
(4) present invention can reach 5.5dB/m～12dB/m at the absorptance of 980nm,
The absorptance of 1550nm can reach 12dB/m～21dB/m, it is possible to meets Erbium-doped fiber amplifier
Device EDFA is to the different application demand of er-doped fluorescence light source.This er-doped photonic crystal fiber exists
980nm pump light and 1550nm output light are single mode transport, it is possible to ensure good pumping
Efficiency and the beam quality going out light.1550nm mode field diameter can be controlled in 3.0 microns～8.0 micro-
Rice, it is possible to meet the use demand of different components design.
(5) present invention is designed with the special airport number of plies and airport dutycycle, makes er-doped
Photonic crystal fiber has background loss and the color of optimum at wavelength 1310nm～1550nm wave band
Dissipate characteristic, and good gain can be realized, improve light conversion efficiency.By micropore and fibre core
The cutoff wavelength of photonic crystal fiber is optimized by optimum organization flexibly such that it is able to control light flexibly
Fine zero-dispersion wavelength, is adjusted flexibly between 1310nm and 1550nm according to actual needs.
(6) present invention uses multipole method to design, the structure of reasonably optimizing air aperture layer, controls
The ring number of plies of airport, makes er-doped photonic crystal fiber in wavelength 980nm～1550nm scope
Interior holding single mode transport.Airport in the present invention is designed as regular hexagon distribution, also helps
Compare accurate drawing.
(7) present invention has excellent bending resistance, the minimum under 5mm bending radius
Bending added losses are less than 0.2dB.
Accompanying drawing explanation
Fig. 1: the end face structure of the actual er-doped photonic crystal fiber developed in the embodiment of the present invention
Figure；
Fig. 2: the toroidal ring structure design drawing of er-doped photonic crystal fiber in the embodiment of the present invention；
The absorption collection of illustrative plates of er-doped photonic crystal fiber in Fig. 3: the embodiment of the present invention 3；
The mode field diameter test figure of er-doped photonic crystal fiber in Fig. 4: the embodiment of the present invention 10.
Reference: 1 silica core, 1a adulterates sandwich layer, 1b fluorine doped covering, and 2 is empty
Pore, 3 quartz surrounding layers, 4 coatings.
Detailed description of the invention
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in further detail.
Seeing shown in Fig. 1, Fig. 2, the embodiment of the present invention provides a kind of er-doped photonic crystal fiber,
This optical fiber includes the silica core 1 being arranged in order from the inside to the outside, has several airports 2
Air aperture layer, quartz surrounding layer 3, coating 4, air aperture layer is coated on outside silica core 1
Side, quartz surrounding layer 3 uses pure silicon dioxide to make, and is coated on the outside of air aperture layer,
Coating 4 is coated in the outside of quartz surrounding layer 3；Airport 2 is all along optical fiber axial distribution and pass through
Being through at whole optical fiber, airport 2 arrangement forms multilamellar ring, and the number of plies of ring is at least 5
Layer, airport 2 size in every layer of ring is the most identical, the airport 2 in every layer of ring all with
Centered by silica core 1, arrange in regular hexagon, the quantity of the airport 2 in every layer of ring
=ring number of plies * 6；Silica core 1 includes adulterate sandwich layer 1a, fluorine doped covering 1b, and adulterate sandwich layer
1a is mixed with erbium ion, praseodymium ion, and a small amount of aluminium ion and germanium ion, fluorine doped covering 1b
It is coated on the outside of doping sandwich layer 1a.
The present invention reduces germanium, aluminum etc. in doping sandwich layer 1a can increase the ion doping of colour center, with
Time introduce praseodymium ion be co-doped with, it is achieved radiation-resisting performance.Also mixed with a certain amount of in doping sandwich layer 1a
Boron ion, for opposing due to introduce praseodymium ion and in the case of the reunion that brings and power ascension
The effect such as darkening.
Preferably, the ring number of plies in air aperture layer is 5～9 layers, typical value include 6 layers,
7 layers, 8 layers, 9 layers etc.；In actual application, the ring number of plies most preferably 7 in air aperture layer
Layer.In 1st layer of ring, the quantity of airport 2 is N1=1*6=6, in the 2nd layer of ring
The quantity of airport 2 is N2=2*6=12, the like, air in xth layer ring
Quantity Nx=x*6 in hole 2.
The dutycycle of air aperture layer hollow pore 2 is 25%～40%, two adjacent airports
The spacing of 2 is 3.0 μm～6.0 μm, and the internal diameter of airport 2 is 1.0 μm～4.0 μm.
A diameter of 3.0 μm of doping sandwich layer 1a～8.0 μm, fluorine doped covering 1b's is a diameter of
4.0 μm～10.0 μm.Fluorine doped covering 1b is-0.0% with the refractive index contrast of quartz surrounding layer 3
～-1.0%, the fluorine doped concentration of fluorine doped covering 1b is with fluorine doped covering 1b and quartz surrounding layer 3
Refractive index contrast determines.A diameter of 80.0 μm of quartz surrounding layer 3～125.0 μm, be coated with
A diameter of 135.0 μm of layer 4～245.0 μm.
The coating 4 of the outer coating of quartz surrounding layer 3, for protecting optical fiber.Coating 4 is adopted
Material be polyacrylic resin or polyimides, when external environment is severe, operating temperature
Time higher, by using resistant to elevated temperatures polyacrylic resin or polyimides, optical fiber can be made to exist
Good working order is kept under the conditions of more than 100 degree.The material that coating 4 uses is polypropylene
During acid resin, the highest temperature that works long hours of optical fiber can reach 150 degree；Coating 4 uses
When material is polyimides, the highest temperature that works long hours of optical fiber is up to 300 degree.Coating 4
Can be single coating, it is also possible to for double coatings.When coating 4 is single coating, the material of employing
Material can be polyacrylic resin, it is also possible to for polyimide resin.When coating 4 is double painting
During layer, the material of employing can be the polyacrylic resin of two-layer, it is possible to for the polyamides of two-layer
Imide resin, or internal layer employing polyacrylic resin, outer layer uses polyimide resin.
Below by 15 specific embodiments, the present invention is described in further detail:
Embodiment 1～15 provides quartz surrounding layer 3 diameter from 80 microns～125 microns not
Er-doped photonic crystal fiber with dimensions.
In embodiment 1～5, the ring number of plies of er-doped photonic crystal fiber is 5 layers, and coating material is i.e.
Can use polyacrylic resin, it is possible to use polyimide resin, coating 4 can be single painting
Layer, it is possible to for double coatings.In embodiment 1～5, the structural parameters of er-doped photonic crystal fiber are such as
Shown in table 1:
Table 1, tool are of five storeys the structural parameters of er-doped photonic crystal fiber of ring
As it can be seen from table 1 total at 100Krad of the er-doped photonic crystal fiber of 5 layers of ring
Under radiation dose, 1200nm Radiation induced loss value added is 0.2～0.4dB/m, has excellent
Anti-radiation performance.The 980nm absorptance of the er-doped photonic crystal fiber of 5 layers of ring is
5.5～5.9dB/m, 1550nm absorptance is 12～13dB/m, uses embodiment 3 to try
When testing, the typical absorption of this er-doped photonic crystal fiber is composed as shown in Figure 3.
In embodiment 6～10, the ring number of plies of er-doped photonic crystal fiber is 7 layers, coating material
Can use polyacrylic resin, it is possible to use polyimide resin, coating 4 can be single painting
Layer, it is possible to for double coatings.When coating material uses resistant to elevated temperatures polyacrylic resin, the highest
The temperature that works long hours is up to 150 degree.The knot of er-doped photonic crystal fiber in embodiment 6～10
Structure parameter is as shown in table 2:
Table 2, there are the structural parameters of the er-doped photonic crystal fiber of 7 layers of ring
From table 2 it can be seen that total at 100Krad of the er-doped photonic crystal fiber of 7 layers of ring
Under radiation dose, 1200nm Radiation induced loss value added is 0.15～0.4dB/m, has excellent
Good anti-radiation performance.The 1550nm mode field diameter of the er-doped photonic crystal fiber of 7 layers of ring
It is 3～5 μm, when using embodiment 10 to test, the typical case of this er-doped photonic crystal fiber
Mould field test figure is as shown in Figure 4.
In embodiment 11～15, the ring number of plies of er-doped photonic crystal fiber is 9 layers, coating material
Can use polyacrylic resin, it is possible to use polyimide resin, coating 4 can be single painting
Layer, it is possible to for double coatings.The structural parameters of er-doped photonic crystal fiber in embodiment 11～15
As shown in table 3:
Table 3, there are the structural parameters of the er-doped photonic crystal fiber of 9 layers of ring
From table 3 it can be seen that total at 100Krad of the er-doped photonic crystal fiber of 9 layers of ring
Under radiation dose, 1200nm Radiation induced loss value added is 0.1～0.2dB/m, has excellent
Anti-radiation performance.
Those skilled in the art can carry out various modifications and variations to the embodiment of the present invention, if
If these amendment and modification within the scope of the claims in the present invention and equivalent technologies thereof, then this
A little amendments and modification are also within protection scope of the present invention.
The prior art that the content not described in detail in description is known to the skilled person.
Claims (10)
1. an er-doped photonic crystal fiber, this optical fiber includes the stone being arranged in order from the inside to the outside
English fibre core (1), have several airports (2) air aperture layer, quartz surrounding layer (3),
Coating (4), described airport (2) all along optical fiber axial distribution and through whole optical fiber,
It is characterized in that: described airport (2) arrangement forms multilamellar ring, the number of plies of described ring
At least 5 layers, airport (2) size in every layer of ring is the most identical, in every layer of ring
Airport (2), all centered by silica core (1), arranges in regular hexagon, every layer of ring
In quantity=ring number of plies * 6 of airport (2)；Described silica core (1) includes doping
Sandwich layer (1a), described doping sandwich layer (1a) is mixed with erbium ion, praseodymium ion.
2. er-doped photonic crystal fiber as claimed in claim 1, it is characterised in that: described
Silica core (1) also includes that fluorine doped covering (1b), described fluorine doped covering (1b) are coated on institute
State the outside of doping sandwich layer (1a).
3. er-doped photonic crystal fiber as claimed in claim 1, it is characterised in that: described
Also mixed with a certain amount of boron ion in doping sandwich layer (1a).
4. er-doped photonic crystal fiber as claimed in claim 1, it is characterised in that: described
The dutycycle of air aperture layer hollow pore (2) is 25%～40%.
5. er-doped photonic crystal fiber as claimed in claim 2, it is characterised in that: described
Fluorine doped covering (1b) is-0.0%～-1.0% with the refractive index contrast of quartz surrounding layer (3).
6. er-doped photonic crystal fiber as claimed in claim 1, it is characterised in that: described
The ring number of plies in air aperture layer is 5～9 layers.
7. er-doped photonic crystal fiber as claimed in claim 6, it is characterised in that: described
The ring number of plies in air aperture layer is 7 layers.
8. er-doped photonic crystal fiber as claimed in claim 1, it is characterised in that: adjacent
The spacing of two described airports (2) be 3.0 μm～6.0 μm.
9. er-doped photonic crystal fiber as claimed in claim 1, it is characterised in that: described
The internal diameter of airport (2) is 1.0 μm～4.0 μm.
10. er-doped photonic crystal fiber as claimed in claim 1, it is characterised in that: institute
State a diameter of 3.0 μm～8.0 μm of doping sandwich layer (1a).
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| CN201610392053.1A CN105842779A (en) | 2016-06-03 | 2016-06-03 | Erbium-doped photonic crystal fiber |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114702239A (en) * | 2022-02-18 | 2022-07-05 | 中国科学院西安光学精密机械研究所 | Fluorine-doped cladding-based irradiation-resistant erbium-doped optical fiber preform and preparation method thereof |
| CN115521079A (en) * | 2022-09-29 | 2022-12-27 | 长飞光纤光缆股份有限公司 | Post-processing method of radiation-resistant optical fiber |
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Cited By (3)
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| CN114702239A (en) * | 2022-02-18 | 2022-07-05 | 中国科学院西安光学精密机械研究所 | Fluorine-doped cladding-based irradiation-resistant erbium-doped optical fiber preform and preparation method thereof |
| CN115521079A (en) * | 2022-09-29 | 2022-12-27 | 长飞光纤光缆股份有限公司 | Post-processing method of radiation-resistant optical fiber |
| CN115521079B (en) * | 2022-09-29 | 2024-04-19 | 长飞光纤光缆股份有限公司 | Post-treatment method of radiation-resistant optical fiber |
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Effective date of registration: 20161229 Address after: 430074 East Lake Development Zone, Hubei, Optics Valley Venture Street, No. 67, No. Applicant after: Fenghuo Communication Science and Technology Co., Ltd. Applicant after: Rui Light Communication Technology Co Ltd Address before: 430074 East Lake Development Zone, Hubei, Optics Valley Venture Street, No. 67, No. Applicant before: Fenghuo Communication Science and Technology Co., Ltd. |
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