CN1634784A - Erbium ytterbium codoped multi-component oxide glass single-mode optical fiber core glass and method for preparing single-mode optical fiber - Google Patents

Erbium ytterbium codoped multi-component oxide glass single-mode optical fiber core glass and method for preparing single-mode optical fiber Download PDF

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CN1634784A
CN1634784A CN 200310124755 CN200310124755A CN1634784A CN 1634784 A CN1634784 A CN 1634784A CN 200310124755 CN200310124755 CN 200310124755 CN 200310124755 A CN200310124755 A CN 200310124755A CN 1634784 A CN1634784 A CN 1634784A
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glass
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component oxide
erbium
ytterbium codoped
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CN1315746C (en
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邹快盛
陆敏
李玮楠
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XiAn Institute of Optics and Precision Mechanics of CAS
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XiAn Institute of Optics and Precision Mechanics of CAS
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    • C03C13/00—Fibre or filament compositions
    • C03C13/04—Fibre optics, e.g. core and clad fibre compositions
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    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
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    • C03B37/01—Manufacture of glass fibres or filaments
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    • C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
    • C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
    • C03B37/01228—Removal of preform material
    • C03B37/01231—Removal of preform material to form a longitudinal hole, e.g. by drilling
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    • C03B37/01—Manufacture of glass fibres or filaments
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    • C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
    • C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
    • C03B37/0124—Means for reducing the diameter of rods or tubes by drawing, e.g. for preform draw-down
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    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
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    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
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    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
    • C03C3/068—Glass compositions containing silica with less than 40% silica by weight containing boron containing rare earths
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    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
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    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2201/00—Type of glass produced
    • C03B2201/06—Doped silica-based glasses
    • C03B2201/08—Doped silica-based glasses doped with boron or fluorine or other refractive index decreasing dopant
    • C03B2201/10—Doped silica-based glasses doped with boron or fluorine or other refractive index decreasing dopant doped with boron
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    • C03B2201/34—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi doped with rare earth metals, i.e. with Sc, Y or lanthanides, e.g. for laser-amplifiers
    • C03B2201/36—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi doped with rare earth metals, i.e. with Sc, Y or lanthanides, e.g. for laser-amplifiers doped with rare earth metals and aluminium, e.g. Er-Al co-doped
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Abstract

Erbium ytterbium codoped multi-component oxide glass single-mode optical fiber core glass and a method for preparing single-mode optical fiber. The core glass composition comprises SiO2、Al2O3、Li2O、Yb2O3、Er2O3、B2O3And the like. The method for preparing the single-mode optical fiber comprises the following steps: taking an erbium-doped glass blank, making the erbium-doped glass blank into a round rod, and drawing the round rod into a thin round rod to form core glass; taking a non-erbium-doped glass blank, making the non-erbium-doped glass blank into a round bar, and perforating by using laser to form cladding glass; placing the thin round rod into the hole of the cladding glass to form an erbium-doped optical fiber preform; putting the prefabricated rod into a wire drawing furnace for drawingTo form a single mode optical fiber. The invention solves the problems of uneven gain spectrum, narrow gain bandwidth, complex preparation process and the like in the prior art. The erbium ytterbium codoped multi-component oxide optical glass fiber can provide transmission bandwidth of 60nm and flatter gain spectrum, has higher glass transition temperature and better chemical and thermal stability, and can completely meet the increasing demand of the current optical communication transmission network.

Description

Erbium ytterbium codoped multi-component oxide glass single-mode fiber core glass and prepare the method for single-mode fiber
Technical field
The present invention relates to a kind of light amplification with erbium ytterbium codoped multi-component oxide glass single-mode fiber and preparation method thereof, and the invention still further relates to Er-doped fiber that the 3rd optical communication window light fiber amplifier or optical fiber laser use and preparation method thereof.
Background technology
Erbium-doped fiber amplifier (EDFA) is widely used in the amplification of optical communication field 1550nm wave band optical signal, and wherein optical amplification medium is the optical fiber that is doped with erbium ion.Yet, increase along with the Communications service demand of continuous development, increasing sharply of internet information transmission capacity, the information transmission capacity of fiber backbone network and light Metropolitan Area Network (MAN) sharply expands, current wavelength-division multiplex (WDM) communication system is difficult to adapt to this demand, dense wave division multipurpose (DWDM) communication system arises at the historic moment, the EDFA owing to employing mostly is the quartz substrate erbium-doped fiber amplifier in the real system at present, its gain spectral shape is very sharp-pointed, and (1530～1565nm) are too narrow to and have only about 35nm obtainable net gain bandwidth, have seriously restricted the number of channel of dense wave division multipurpose (DWDM) communication system transmission system.
If erbium-doped fiber amplifier EDFA can realize more smooth gain in wideer wavelength region, then can widen the available signal wavelength, be expected to increase transmission capacity.For reaching this purpose, people cascade up the image intensifer of different gains wavelength region, and still, this structure is very complicated, and can't realize the amplification of optical signal at the edge of each gain centre wavelength.Therefore, people are devoted to study broadband flat gain image intensifer fiber optic materials always, and the best image intensifer material of current use is by ZBLAN (ZrF 3-BaF 2-LaF 3-AlF 3-NaF) the optical fiber made of glass, but it costs an arm and a leg and complicated process of preparation, and its glass transformation temperature is also lower than tellurate glass, bismuthate glass, poor heat stability.
Summary of the invention
It is smooth inadequately to the invention solves in the background technology gain spectral, and gain bandwidth is narrow, can't satisfy the demand that current optical communication transmission network increases, and glass transformation temperature is low, poor heat stability, the technical problem of complicated process of preparation.
Technical solution of the present invention is:
A kind of erbium ytterbium codoped multi-component oxide glass single-mode fiber core glass, its special character is: the molar percentage of this erbium ytterbium codoped multi-component oxide glass single-mode fiber core glass consists of
??SiO 2 ?20～80
??B 2O 3 ?0～40
??Al 2O 3 ?3～20
??Li 2O ????1～20
??Na 2O ????0～20
??K 2O ????0～20
??CaO ????0～10
??BaO ????0～10
??ZnO ????0～10
??MgO ????0～10
??Er 2O 3 ????0.01～10
??Yb 2O 3 ????0.1～25
??ZrO 2 ????0～5
??Bi 2O 3 ????0～10
??La 2O 3 ????0～10
??Y 2O 3 ????0～10
Above-mentioned SiO 2And B 2O 3Total content be good with 20～85mol%.
Above-mentioned Li 2O, Na 2O and K 2The total content of O is good with 5～25mol%.
Above-mentioned Bi 2O 3, La 2O 3And Y 2O 3Total content be good with 0～20%.
The preferable composition of above-mentioned erbium ytterbium codoped multi-component oxide glass single-mode fiber core glass can be
?SiO 2(mol％) 65.00
?B 2O 3(mol％) 10.00
?Al 2O 3(mol％) 5.00
?Li 2O(mol％) 2.00
?Na 2O(mol％) 9.00
?Er 2O 3(mol％) 0.50
?Yb 2O 3(mol％) 5.30
Other (mol%) 3.20
Described other component can comprise Ta 2O 3, GeO 2Deng.
The preferable composition of above-mentioned erbium ytterbium codoped multi-component oxide glass single-mode fiber core glass can be
?SiO 2(mol％) 62.00
?B 2O 3(mol％) 9.00
?Al 2O 3(mol％) 4.00
?Li 2O(mol％) 6.70
?K 2O(mol％) 9.00
?Er 2O 3(mol％) 0.40
?Yb 2O 3(mol％) 4.20
Other (mol%) 4.70
Described other component can comprise Ta 2O 3, GeO 2Deng.
A kind ofly prepare the method for single-mode fiber according to above-mentioned erbium ytterbium codoped multi-component oxide glass single-mode fiber core glass, its special character is: this preparation method comprises
1). get raw material by erbium ytterbium codoped multi-component oxide compound composition,, get glass blank through melting, founding; The glass blank plastic polishing is become pole 4;
2). pole 4 is drawn into the thin pole 6 that diameter is 0.1～3mm, forms the core glass of the Er-doped fiber prefabricated rods 8 of erbium ytterbium codoped multi-component oxide glass single-mode fiber 10;
3). get non-many components of er-doped oxide glass blank, it is the pole 5 of 2～60mm that plastic polishing becomes diameter;
4). punch with laser in the center at pole 5, the internal diameter in hole is complementary, can makes thin pole 6 to insert with the diameter of thin pole 6, forms the cladding glass 7 of Er-doped fiber prefabricated rods 8;
5). thin pole 6 is inserted in the centre hole of cladding glass 7, form Er-doped fiber prefabricated rods 8;
6). Er-doped fiber prefabricated rods 8 is put into fiber drawing furnace 9, in 650～830 ℃ temperature range, be drawn into erbium ytterbium codoped multi-component oxide glass single-mode fiber 10.
Above-mentioned pole 4 is drawn into thin pole 6, its diameter is good with 1mm.
The pole 5 that many components of the non-er-doped of above-mentioned usefulness oxide glass blank plastic polishing becomes, diameter is advisable with 20mm.
The present invention has the following advantages:
Erbium ytterbium codoped multi-component oxide optical glass optical fiber among the present invention can provide up to the transmission bandwidth of 60nm and more smooth gain spectral, has higher glass transformation temperature, and have good chemical stability and thermostability, preparation technology is simple, can satisfy the demand of current optical communication development fully.
Description of drawings
The a portion of Fig. 1 is Er-doped fiber cross-sectional structure figure of the present invention; B portion is an optical fiber of the present invention refractive index profile radially;
Fig. 2 is the abosrption spectrogram of core material glass of the present invention;
Fig. 3 has the emission spectrum synoptic diagram of wide and flat gain for Er-doped fiber of the present invention;
Fig. 4 is fibre-optical drawing synoptic diagram among the present invention.
Drawing reference numeral explanation: 1-core material, 2-cladding, 3-plastics covering, n 1The specific refractory power of-fibre core, n 2The specific refractory power of-cladding; 4,5-pole, the thin pole of 6-, 7-cladding glass, 8-Er-doped fiber prefabricated rods, 9-fiber drawing furnace, 10-single-mode fiber.
Embodiment
The present invention is from glass ingredient and glass fibre-forming condition, and according to the single-mode fiber condition of broadband and flat gain, its optical fiber core material and cladding glass component are expressed as follows with molecular fraction:
??SiO 2 ?20～80
??B 2O 3 ?0～40(SiO 2+B 2O 3＝20～85％)
??Al 2O 3 ?3～20
??Li 2O ?1～20
??Na 2O ?0～20
??K 2O ?0～20(Li 2O+Na 2O+K 2O＝5～25％)
??CaO ?0～10
??BaO ?0～10
??ZnO ?0～10
??MgO ?0～10
??Er 2O 3 ?0.01～10
??Yb 2O 3 ?0.1～25
??ZrO 2 ?0～5
??Bi 2O 3 ?0～10
??La 2O 3 ?0～10
??Y 2O 3 ?0～10(Bi 2O 3+La 2O 3+Y 2O 3＝0～20％)
Can also add other in the above-mentioned prescription, as Ta 2O 3, GeO 2Etc. component, but the total content of said components is advisable to be no less than 98mol%.
SiO 2And B 2O 3Generate body as glass network, its total content is 20～85mol%.SiO 2And B 2O 3Content be lower than 20mol%, can make devitrification of glass, reduce the chemical stability of glass, surpass the high temperature melting viscosity that 85mol% can improve glass, make the difficulty of founding of glass, also can influence other component simultaneously and join in the glass.B 2O 3Content surpass 15mol%, can reduce the chemical stability of glass.
Li 2The adding of O can improve Er 3+Dissolution rate, it is very short to make optical signal reach the required medium length of certain gain, this is very favourable for the miniaturization that realizes image intensifer.But Li 2The content of O can not surpass 20mol%, otherwise can make glass be easy to devitrification, dwindles the formation scope of glass.
Na 2O and K 2The adding of O helps enlarging the formation district of glass, is convenient to glass and founds under lower temperature.
Li 2O, Na 2O and K 2The total content of O is 5～25mol%, is lower than 5mol% and can makes the glass melting temperature of glass higher, increases the difficulty of glass smelting, surpasses the chemical stability that 25mol% can reduce glass.
The adding of bivalent metal oxide CaO, BaO, ZnO and MgO is used to adjust the specific refractory power and the thermal properties of glass, improves the chemical stability and the machining property of glass.
Add Al 2O 3Can change Er 3+Ligand field structure on every side makes Er 3+Width at 1.5 μ m emission spectrums increases.Therefore must contain enough high-load Al in this glass 2O 3, but content can not surpass 20mol%, otherwise can increase the viscosity of glass, make glass smelting and difficult forming.
Yb 2O 3As sensitizing agent, strengthen Er 3+Absorption at the 980nm wave band makes Er 3+Fully the energy of absorptive pumping light improves Er 3+In the luminous efficiency of 1.55 mu m wavebands, but Yb 2O 3Content can not surpass 25mol%, otherwise can make glass be easy to devitrification.
Suitably add ZrO 2Can improve the chemical stability of glass effectively, enlarge the formation scope of glass, but can not surpass 5mol%, otherwise can make glass be easy to crystallization, unfavorable to towing.
Suitably add La 2O 3, Y 2O 3And/or Bi 2O 3Work can improve the performance of founding of glass, enlarges the formation scope of glass, but can not surpass 20mol%, otherwise can make glass be easy to crystallization; Help increasing bandwidth simultaneously.
The molar percentage composition embodiment and the effect parameter of glass of the present invention are as follows:
Example one Example two Example three Example four Example five
Form (mol%) Core glass Cladding glass Core glass Cladding glass Core glass Cladding glass Core glass Cladding glass Core glass Cladding glass
??SiO 2 ??65.00 ??65.00 ????62.00 ????62.00 ????55.00 ????55.00 ????60.00 ????60.00 ????70.00 ????70.00
??B 2O 3 ??10.00 ??10.00 ????9.00 ????9.00 ????8.00 ????8.00 ????7.00 ????7.00 ????7.00 ????7.00
??Al 2O 3 ??5.00 ??5.00 ????4.00 ????4.00 ????5.00 ????5.00 ????4.00 ????4.00 ????4.00 ????4.00
??Li 2O ??2 ??4.00 ????6.70 ????4.70 ????14.00 ????6.00 ????8.00 ????6.00 ????8.00 ????6.00
??Na 2O ??9.00 ??4.00 ????0.00 ????6.00 ????2.00 ????6.00 ????3.00 ????4.00 ????6.00 ????5.00
??K 2O ??0.00 ??2.00 ????9.00 ????5.00 ????0.00 ????4.00 ????6.00 ????7.00 ????0.00 ????3.00
Other ??3.20 ??4.00 ????4.70 ????5.60 ????9.20 ????10.60 ????2.70 ????4.50 ????1.60 ????2.70
??Er 2O 3 ??0.50 ??0.00 ????0.40 ????0.00 ????0.80 ????0.00 ????0.60 ????0.00 ????0.30 ????0.00
??Yb 2O 3 ??5.30 ??5.00 ????4.20 ????3.70 ????6.00 ????5.40 ????8.70 ????7.50 ????3.10 ????2.30
Specific refractory power ??1.5875 ??1.5773 ????1.5802 ????1.5656 ????1.6178 ????1.5989 ????1.6223 ????1.6053 ????1.5825 ????1.5575
Transition point (℃) ??528 ??530 ????520 ????524 ????510 ????512 ????530 ????533 ????570 ????572
Softening temperature (℃) ??603 ??605 ????595 ????601 ????570 ????575 ????590 ????596 ????650 ????655
Refractive indices n ??0.0102 ????0.0146 ????0.0189 ????0.0170 ????0.0250
Numerical aperture ??0.18 ????0.21 ????0.25 ????0.23 ????0.28
Core diameter (μ m) ??6.6 ????5.5 ????4.8 ????5 ????4.2
Cladding diameter (μ m) ??130 ????125 ????115 ????120 ????100
Normalized parameter v ??2.4035 ????2.3890 ????2.3988 ????2.3738 ????2.3851
Er-doped fiber comprises core material and cladding and cladding glass double-layer structure among the present invention, and a of Fig. 1 partly is Er-doped fiber cross-sectional structure figure, and wherein 1 is core material, and 2 is cladding, and 3 is the plastics covering; The b of Fig. 1 partly is this optical fiber refractive index profile radially, n 1Be the specific refractory power of fibre core, n 2Specific refractory power for cladding.
The preparation method of Er-doped fiber of the present invention adopts rod-in-tube technique to draw.The core glass material is the er doped silica glasses rod among the present invention, and the absorption spectrum of core material glass as shown in Figure 2.Cladding is the non-er doped silica glasses pipe that is complementary with the core material specific refractory power, and unstressed in order to guarantee in the optical fiber, the thermomechanical property of cladding glass material comprises transition temperature, softening temperature of the coefficient of expansion, glass etc., should be complementary with the core glass material, its difference is advisable to be no more than 3%.Fig. 4 is fibre-optical drawing synoptic diagram among the present invention, and its drawing method is as follows:
The first step: get raw material by erbium ytterbium codoped multi-component oxide compound composition,, obtain glass blank through melting, founding; The glass blank plastic polishing is become pole 4;
Second step: pole 4 is drawn into the thin pole 6 that diameter is 0.1～3mm, is good with 1mm, forms erbium ytterbium codoped multi-component oxide glass single-mode fiber 10, i.e. the core glass of Er-doped fiber prefabricated rods 8.
The 3rd step: get non-many components of er-doped oxide glass blank, it is the pole 5 of 2～60mm that plastic polishing becomes diameter, is good with 20mm;
The 4th step: punch with laser in the center at pole 5, and the diameter in hole is complementary with the diameter of thin pole 6, and thin pole 6 can just be inserted in this hole, forms the cladding glass 7 of Er-doped fiber prefabricated rods 8.Adopt laser boring can guarantee the homogeneity in aperture and the smooth finish of internal surface of hole.
The 5th step: thin pole 6 is inserted in the centre hole of cladding glass 7, form Er-doped fiber prefabricated rods 8;
The 6th step: Er-doped fiber prefabricated rods 8 is put into fiber drawing furnace 9, in 650～830 ℃ temperature range, be drawn into erbium ytterbium codoped multi-component oxide glass single-mode fiber 10.
Er-doped fiber among the present invention has the emission spectrum of quite wide and flat gain, as shown in Figure 3.
According to the single-mode fiber condition, as wavelength of optical signal λ 0When determining, normalized frequency V parameter must be less than 2.405, and the relation between the diameter a value of the refractive indices n value between normalized frequency V parameter, core material and the cladding, fibre core is as follows:
V = 2 π λ 0 a n 1 2 Δn

Claims (9)

1. erbium ytterbium codoped multi-component oxide glass single-mode fiber core glass, it is characterized in that: the molar percentage of this erbium ytterbium codoped multi-component oxide glass single-mode fiber core glass consists of ??SiO 2 ?20～80 ??B 2O 3 ?0～40 ??Al 2O 3 ?3～20 ??Li 2O ?1～20 ??Na 2O ?0～20 ??K 2O ?0～20 ??CaO ?0～10 ??BaO ?0～10 ??ZnO ?0～10 ??MgO ?0～10 ??Er 2O 3 ?0.01～10 ??Yb 2O 3 ?0.1～25 ??ZrO 2 ?0～5 ??Bi 2O 3 ?0～10 ??La 2O 3 ?0～10 ??Y 2O 3 ?0～10
2. erbium ytterbium codoped multi-component oxide glass single-mode fiber core glass according to claim 1 is characterized in that: described SiO 2And B 2O 3Total content be 20～85mol%.
3. erbium ytterbium codoped multi-component oxide glass single-mode fiber core glass according to claim 1 and 2 is characterized in that: described Li 2O, Na 2O and K 2The total content of O is 5～25mol%.
4. erbium ytterbium codoped multi-component oxide glass single-mode fiber core glass according to claim 3 is characterized in that: described Bi 2O 3, La 2O 3And Y 2O 3Total content be 0～20%.
5. erbium ytterbium codoped multi-component oxide glass single-mode fiber core glass according to claim 4, it is characterized in that: the composition of described erbium ytterbium codoped multi-component oxide glass comprises ?SiO 2(mol％) 65.00 ?B 2O 3(mol％) 10.00 ?Al 2O 3(mol％) 5.00 ?Li 2O(mol％) 2.00 ?Na 2O(mol％) 9.00 ?Er 2O 3(mol％) 0.50 ?Yb 2O 3(mol％) 5.30 Other (mol%) 3.20
Described other component comprises Ta 2O 3, GeO 2Described.
6. erbium ytterbium codoped multi-component oxide glass single-mode fiber core glass according to claim 4, it is characterized in that: the composition of described erbium ytterbium codoped multi-component oxide glass comprises ?SiO 2(mol％) 62.00 ?B 2O 3(mol％) 9.00 ?Al 2O 3(mol％) 4.00 ?Li 2O(mol％) 6.70 ?K 2O(mol％) 9.00 ?Er 2O 3(mol％) 0.40 ?Yb 2O 3(mol％) 4.20 Other (mol%) 4.70
Described other component comprises Ta 2O 3, GeO 2
7. an erbium ytterbium codoped multi-component oxide glass single-mode fiber core glass according to claim 1 prepares the method for single-mode fiber, and it is characterized in that: this preparation method comprises
1). get raw material by erbium ytterbium codoped multi-component oxide compound composition,, get glass blank through melting, founding; The glass blank plastic polishing is become pole (4);
2). pole (4) is drawn into the thin pole (6) that diameter is 0.1～3mm, forms the core glass of the Er-doped fiber prefabricated rods (8) of erbium ytterbium codoped multi-component oxide glass single-mode fiber (10);
3). get non-many components of er-doped oxide glass blank, it is the pole (5) of 2～60mm that plastic polishing becomes diameter;
4). punch with laser in the center at pole (5), the internal diameter in hole is complementary, can makes thin pole (6) to insert with the diameter of thin pole (6), forms the cladding glass (7) of Er-doped fiber prefabricated rods (8);
5). thin pole (6) is inserted in the centre hole of cladding glass (7), form Er-doped fiber prefabricated rods (8);
6). Er-doped fiber prefabricated rods (8) is put into fiber drawing furnace (9), in 650～830 ℃ temperature range, be drawn into erbium ytterbium codoped multi-component oxide glass single-mode fiber (10).
8. the preparation method of erbium ytterbium codoped multi-component oxide glass single-mode fiber according to claim 7 is characterized in that: described pole (4) is drawn into thin pole (6), the diameter of this thin pole (6) is 1mm.
9. according to the preparation method of claim 7 or 8 described erbium ytterbium codoped multi-component oxide glass single-mode fibers, it is characterized in that: the pole (5) that many components of the non-er-doped of described usefulness oxide glass blank plastic polishing becomes, diameter is 20mm.
CNB2003101247554A 2003-12-31 2003-12-31 Erbium ytterbium codoped multi-component oxide glass single-mode optical fiber core glass and method for preparing single-mode optical fiber Expired - Fee Related CN1315746C (en)

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