CN117263512A - Erbium-doped glass fiber serving as gain medium and preparation method and application thereof - Google Patents
Erbium-doped glass fiber serving as gain medium and preparation method and application thereof Download PDFInfo
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- CN117263512A CN117263512A CN202311066379.1A CN202311066379A CN117263512A CN 117263512 A CN117263512 A CN 117263512A CN 202311066379 A CN202311066379 A CN 202311066379A CN 117263512 A CN117263512 A CN 117263512A
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- 239000003365 glass fiber Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000000835 fiber Substances 0.000 claims abstract description 63
- 239000011521 glass Substances 0.000 claims abstract description 55
- 239000013307 optical fiber Substances 0.000 claims abstract description 53
- 239000002994 raw material Substances 0.000 claims abstract description 26
- 238000005253 cladding Methods 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 21
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910004298 SiO 2 Inorganic materials 0.000 claims abstract description 13
- 238000002844 melting Methods 0.000 claims abstract description 7
- 230000008018 melting Effects 0.000 claims abstract description 7
- 238000005245 sintering Methods 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 12
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 238000012681 fiber drawing Methods 0.000 claims description 5
- 239000000156 glass melt Substances 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 239000010410 layer Substances 0.000 claims description 5
- 239000011247 coating layer Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 3
- 238000007500 overflow downdraw method Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 5
- 230000003321 amplification Effects 0.000 abstract description 3
- 239000012792 core layer Substances 0.000 abstract description 3
- 150000002500 ions Chemical class 0.000 abstract description 3
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 3
- 238000009396 hybridization Methods 0.000 abstract description 2
- 239000011162 core material Substances 0.000 description 28
- 229910052691 Erbium Inorganic materials 0.000 description 9
- 239000010453 quartz Substances 0.000 description 8
- 238000005086 pumping Methods 0.000 description 7
- 238000002189 fluorescence spectrum Methods 0.000 description 6
- 238000001000 micrograph Methods 0.000 description 6
- 238000001228 spectrum Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000004570 mortar (masonry) Substances 0.000 description 4
- 238000012512 characterization method Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 229910052769 Ytterbium Inorganic materials 0.000 description 2
- -1 erbium ions Chemical class 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000295 emission spectrum Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000007526 fusion splicing Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XHGGEBRKUWZHEK-UHFFFAOYSA-L tellurate Chemical compound [O-][Te]([O-])(=O)=O XHGGEBRKUWZHEK-UHFFFAOYSA-L 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01211—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments by inserting one or more rods or tubes into a tube
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
- C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
-
- C—CHEMISTRY; METALLURGY
- 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
- C03C13/00—Fibre or filament compositions
- C03C13/04—Fibre optics, e.g. core and clad fibre compositions
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Abstract
The invention belongs to the technical field of glass optical fibers, and discloses an erbium-doped glass optical fiber serving as a gain medium, and a preparation method and application thereof. The glass fiber consists of a fiber core and a cladding, wherein the fiber core is prepared from the following raw materials in percentage by mole: % SiO 2 ：77.5～98，Cs 2 CO 3 ：1～20，Er 2 O 3 :0.5 to 2.5, and the cladding is quartz glass. The invention also discloses a preparation method of the glass fiber, which is prepared by a fiber core melting method, solves the problem of limited doping concentration of the hybridization ions of the erbium-doped gain fiber prepared by an MCVD method, and effectively solves the limitation of the traditional hot-drawing method on the melting point and the material property of the core layer material of the preform. The glass optical fiber has the C-band ultra-narrow band emission and the obvious characteristics of small signal amplification and the like, and can be used as optical fiber laserGain medium in the device.
Description
Technical Field
The invention relates to the technical field of glass optical fibers, in particular to an erbium-doped glass optical fiber serving as a gain medium, and a preparation method and application thereof.
Background
Since the last century, various types of amplifiers and lasers have been developed successively with the continued development of information and communication technology. Wherein the optical fiber amplifier and the laser are active devices which take doped activated glass optical fiber as gain medium. In recent years, high-power narrow-linewidth fiber laser technology has been attracting attention based on demands in the fields of coherent detection, laser radar, and the like. Erbium-doped fiber amplifiers and lasers are among the most widely used amplifiers and lasers. The development process of the narrow linewidth erbium-doped fiber laser technology is long, the performance of hundreds of watts of output power and hundreds of hertz of linewidth is realized, but the development of the single-frequency fiber laser of ytterbium and the like is far less than that of the single-frequency fiber laser of ytterbium and the like due to low doping concentration of erbium ions and high pumping energy loss of the quartz-based erbium-doped fiber.
Although erbium ions realize high-concentration doping in some erbium-doped tellurate optical fibers, the optical fibers have high fusion splicing loss and poor physical and chemical stability, and bring great difficulty to practical application (such as patent publication number CN 114180835A). Meanwhile, because the heavy metal-based multi-component erbium-doped optical fiber has wide emission spectrum, the single-wavelength emission ratio is low, and the energy loss is high. Therefore, a new hybrid quartz-based erbium-doped fiber needs to be explored to meet the requirements of high fusion compatibility, high physicochemical stability and high pumping efficiency, however, the exploration of new fiber is often limited by the preparation technology.
For many years, the technology for preparing erbium-doped gain fibers has been advanced, and improved chemical vapor deposition (MCVD), hot-drawing methods (such as a tube-rod method and a fiber core fusion method) and the like are more mature. However, the MCVD preparation method is limited by the types of industrial raw materials and the limitation of solution doping, and the component regulation and control degree of freedom of the erbium-doped gain fiber is obviously limited in element types and doping concentrations (such as DOI: 10.1006/ofte.1999.0304); the hot-drawing method is limited by the preparation of the preform, and the core material which is easy to process, high in compactness, and matched with the quartz cladding in melting point (or softening temperature) is one of the limiting factors (such as patent publication numbers CN116253522A and CN 104609722A).
Disclosure of Invention
In order to solve the problems of limited degree of freedom of component regulation and high pumping energy loss of the existing erbium-doped gain fiber, the primary aim of the invention is to provide an erbium-doped glass fiber with high melting point, long material property and high hybridization ion doping concentration used as a gain medium. The glass optical fiber has the characteristics of good continuity, clear core-cladding interface, high doping concentration of hybridized ions, obvious amplification of C-band narrow-band small signals and the like.
It is still another object of the present invention to provide a method for preparing an erbium-doped glass fiber for use as a gain medium.
It is a further object of the present invention to provide the use of the erbium doped glass fiber of the gain medium described above.
The aim of the invention is achieved by the following technical scheme:
an erbium-doped glass fiber serving as a gain medium consists of a fiber core and a cladding, wherein the fiber core is prepared from the following raw materials in percentage by mole: percent (a),
SiO 2 ：77.5～98
Cs 2 CO 3 ：1～20
Er 2 O 3 ：0.5～2.5。
preferably, the fiber core is prepared from the following raw materials in mole percent: percent (a),
SiO 2 ：83.5～94
Cs 2 CO 3 ：5～15
Er 2 O 3 ：1～1.5。
preferably, the cladding is quartz glass;
the erbium-doped glass fiber used as the gain medium is prepared by a fiber core fusion method.
The preparation method of the erbium-doped glass fiber serving as the gain medium specifically comprises the following steps:
(1) Preparation of a core glass sintered body: uniformly mixing the raw materials, tabletting to obtain a block mixture, uniformly cutting into square slices, heating to obtain glass melt, cooling to room temperature to obtain erbium-doped glass, grinding into erbium-doped glass powder,the fiber core glass sintered body is obtained after high-temperature sintering through a mesh screen, a pressing strip; the raw material is SiO 2 、Cs 2 CO 3 Er and Er 2 O 3 ；
(2) Processing a preform rod: processing the fiber core glass sintered body into a rod shape, and placing the fiber core glass sintered rod into a tubular cladding material to obtain a prefabricated rod; the diameter of the fiber core glass sintering rod is smaller than the inner diameter of the tubular cladding material; the tubular cladding material is a quartz glass tube;
(3) And (3) drawing an optical fiber: and drawing the prefabricated rod into an optical fiber to obtain the erbium-doped glass optical fiber serving as the gain medium.
Preferably, in the step (1), the uniform mixing is uniform grinding, and the heating is carried out by placing CO in a gas suspension melting furnace cavity 2 Heating by laser at 1700-2000 ℃; the high-temperature sintering temperature is 1300-1450 ℃, and the temperature is kept for 4-6 hours.
Preferably, in the step (1), the block mixture is a cylindrical flake block mixture with a diameter of 15-20 mm, the square flake size is 3mm x 3 mm-5 mm x 5mm, the pressure of the tabletting is 2-20Mpa, and the pressure is maintained for 2-5 min;
the pressure of the pressing bar is 10-30Mpa, the pressure is maintained for 10-20 min, and a cuboid block with the size of 40-50 mm, 8-10 mm and 4-5 mm is obtained.
Preferably, the diameter of the core glass sintered rod in step (2) is 1-3mm, and the core glass sintered rod is polished and pickled before being placed in the tubular cladding material.
Preferably, in step (1), when Cs 2 CO 3 When the mole percentage is higher than 10%, the raw materials are uniformly mixed, the obtained mixture is directly placed in a die for layering, and the fiber core glass sintered body is obtained after high-temperature sintering.
Preferably, in the step (3), the preform is drawn in an optical fiber drawing tower, the drawing condition is that the preform is fixed on the drawing tower, argon is introduced for protection, the drawing temperature is 2000-2100 ℃, the drawing speed is 5-30 m/min, and the diameter of the drawn optical fiber is 125 μm;
the outer layer of the optical fiber is coated with ultraviolet light curing resin, and the diameter of the coating layer is 250 mu m.
The erbium-doped glass fiber serving as the gain medium is applied to a fiber laser and serves as the gain medium.
Compared with the prior art, the invention has the following advantages and effects:
(1) The method of the invention solves the problem that the doping concentration of the erbium-doped gain optical fiber prepared by MCVD is limited;
(2) The method effectively solves the limit of the traditional hot-drawing method on the melting point and the material property of the core layer material of the preform;
(3) By adopting the method, the erbium-doped glass fiber has narrow-band emission with high energy concentration and C-band small signal amplification, and high-efficiency gain is easier to obtain;
(4) The method of the invention can be used for gain medium in fiber laser.
Drawings
FIG. 1 is a fiber optic microscope image of the preparation of an erbium doped fiber of example 1;
FIG. 2 is a graph showing fluorescence spectra of the erbium-doped glass and the quartz erbium-doped glass of example 1;
FIG. 3 is a small signal gain spectrum of the erbium doped glass fiber prepared in example 1;
FIG. 4 is a fiber optic microscope image of the preparation of erbium doped fiber of example 2;
FIG. 5 is a graph showing fluorescence spectra of the erbium-doped glass and the quartz erbium-doped glass of example 2;
FIG. 6 is a small signal gain spectrum of the erbium doped glass fiber prepared in example 2;
fig. 7 is a fiber microscope image of the hollow core fiber prepared in comparative example 1.
Detailed Description
The present invention will be described in further detail with reference to examples, but embodiments of the present invention are not limited thereto, and the process parameters not specifically mentioned may be performed by referring to conventional techniques.
High purity SiO 2 、Cs 2 CO 3 、Er 2 O 3 : purchased from Alatine with a purity of 99.99%。
Example 1
The embodiment provides a preparation method of an erbium-doped gain glass fiber, which comprises the following steps:
(1) Selecting high-purity SiO 2 、Cs 2 CO 3 、Er 2 O 3 As a raw material, wherein SiO 2 :Cs 2 CO 3 :Er 2 O 3 The molar ratio of (2) is 94:5:1, the raw materials with the total weight of 15g are weighed, and the raw materials are ground for 30min in an agate mortar to obtain fully mixed raw materials;
(2) The obtained glass mixture is placed in a die for tabletting, the pressure is set to be 2-20Mpa, the pressure is maintained for 2-5 min, the cylindrical flake block mixture with the size of 15mm is obtained, and then a blade is used for evenly dividing the cylindrical flake block mixture into square flakes with the size of 3mm and 3 mm; using a pneumatic suspension smelting technique, the resulting mass is placed in a gas suspension furnace chamber using CO 2 Heating the glass melt to 1700-2000 ℃ by laser to obtain glass melt, and closing CO 2 The laser cools the resulting glass melt to room temperature to obtain the erbium-doped glass.
(3) Grinding the obtained erbium-doped glass into powder by using a mortar, passing the obtained erbium-doped glass powder through a 800-mesh screen, placing the obtained erbium-doped glass powder into a die for layering, setting the pressure to be 10-30Mpa, maintaining the pressure for 10-20 min to obtain cuboid blocks with the size of 40mm x 8mm x 4mm, sintering the cuboid blocks into a compact fiber core glass sintered body by using a high-temperature electric furnace, wherein the sintering temperature of the sintering process is 1400-1450 ℃, and preserving the heat for 4h.
(4) Processing the fiber core glass sintered body obtained in the step (3) into a rod shape with the diameter of 1-3mm, polishing and pickling the fiber core glass sintered rod, and then placing the polished fiber core glass sintered rod into a tubular cladding material to obtain a preform; the diameter of the fiber core glass sintering rod is smaller than the inner diameter of the tubular cladding material; the tubular cladding material is a quartz glass tube;
(5) Drawing the prefabricated rod prepared in the step (4) into an optical fiber, and drawing the optical fiber in an optical fiber drawing tower; the drawing conditions are that the preformed rod is fixed on a drawing tower, argon is introduced for protection, the drawing temperature is 2050 ℃, and the drawing speed is 5-30 m/min; the diameter of the drawn optical fiber is 125 μm; the outer layer of the optical fiber is coated with ultraviolet light curing resin, and the diameter of the coating layer is 250 mu m.
Characterization of the prepared optical fiber, fig. 1 is a fiber microscope image of the erbium-doped optical fiber prepared in example 1, and the prepared erbium-doped glass optical fiber has good light transmittance, complete core package structure and good optical fiber flexibility. FIG. 2 is a graph of fluorescence spectra of the erbium-doped glass prepared in example 1, in which the full width at half maximum of fluorescence of the erbium-doped glass prepared in example 1 is 30nm, which is reduced by 10nm compared with that of quartz erbium-doped glass. FIG. 3 shows the small signal gain spectrum of the erbium-doped glass fiber prepared in example 1 under 980nm laser pumping, the obtained erbium-doped glass fiber gain spectrum is similar to the erbium-doped glass fluorescence spectrum, the erbium-doped glass fiber has C-band narrow-band gain under 980nm pumping, the 3dB bandwidth is about 6nm, the energy concentration is high, the high-efficiency gain is easier to obtain at the center wavelength, and the erbium-doped glass fiber has the potential of being used as a gain medium in a narrow-linewidth fiber laser.
Example 2
The embodiment provides a preparation method of an erbium-doped gain glass fiber, which comprises the following steps:
(1) Selecting high-purity SiO 2 、Cs 2 CO 3 、Er 2 O 3 As a raw material, wherein SiO 2 :Cs 2 CO 3 :Er 2 O 3 The molar ratio of (2) is 83.5:15:1.5, the raw materials with the total weight of 15g are weighed, and the raw materials are ground for 30min in an agate mortar to obtain fully mixed raw materials;
(2) The obtained mixed raw materials pass through a 800-mesh screen, the obtained mixed raw material powder is placed in a die for layering, the pressure is set to be 10-30Mpa, the pressure is maintained for 10-20 min, a cuboid block with the size of 40mm x 8mm x 4mm is obtained, a compact fiber core sintered body is sintered by using a high-temperature electric furnace, the sintering temperature of the sintering process is 1300 ℃, and the temperature is kept for 4h.
(4) Processing the fiber core sintered body obtained in the step (3) into a rod shape with the diameter of 1-3mm, polishing and pickling the fiber core sintered rod, and then placing the polished fiber core sintered rod into a tubular cladding material to obtain a prefabricated rod; the diameter of the fiber core sintering rod is smaller than the inner diameter of the tubular cladding material; the tubular cladding material is a quartz glass tube;
(5) Drawing the prefabricated rod prepared in the step (4) into an optical fiber. Drawing an optical fiber in an optical fiber drawing tower; the drawing conditions are that the preformed rod is fixed on a drawing tower, argon is introduced for protection, the drawing temperature is 2030 ℃, and the drawing speed is 5-30 m/min; the diameter of the drawn optical fiber is 125 μm; the outer layer of the optical fiber is coated with ultraviolet light curing resin, and the diameter of the coating layer is 250 mu m.
Characterization of the prepared optical fiber, fig. 4 is a fiber microscope image of the erbium-doped optical fiber prepared in example 2, and the prepared erbium-doped glass optical fiber has good light transmittance, complete core package structure and good optical fiber flexibility. FIG. 5 is a graph of fluorescence spectrum of the erbium-doped glass prepared in example 2, the full width at half maximum of fluorescence of the obtained erbium-doped glass is 31nm, which is reduced by 9nm compared with quartz erbium-doped glass. FIG. 6 is a graph showing the small signal gain spectrum of the erbium-doped glass fiber prepared in example 2 under 980nm laser pumping, the obtained erbium-doped glass fiber gain spectrum is similar to the erbium-doped glass fluorescence spectrum, the erbium-doped glass fiber has a C-band narrow-band gain under 980nm pumping, the 3dB bandwidth is about 10nm, the energy concentration is high, the high-efficiency gain is easier to obtain at the center wavelength, the fiber has ultra-narrow band C-band emission and small signal gain, and the fiber has the potential of being used as a gain medium in a narrow-linewidth fiber laser.
Comparative example
The comparative example provides a method for preparing erbium-doped gain glass fiber, comprising the following steps:
(1) Selecting high-purity SiO 2 、Cs 2 CO 3 、Er 2 O 3 As a raw material, wherein SiO 2 :Cs 2 CO 3 :Er 2 O 3 The molar ratio of (2) is 94:5:1, the raw materials with the total weight of 15g are weighed, and the raw materials are ground for 30min in an agate mortar to obtain fully mixed raw materials;
(2) Filling the obtained mixed raw material powder into a quartz glass cladding with an inner hole, and compacting the mixed material by using a glass rod with the diameter of 1-3mm until the mixed material is scattered unnaturally under the action of gravity to obtain a preform;
(3) Drawing the prefabricated rod prepared in the step (2) into an optical fiber, and drawing the optical fiber in an optical fiber drawing tower; the drawing conditions are that the preformed rod is fixed on a drawing tower, argon is introduced for protection, the drawing temperature is 2050 ℃, and the drawing speed is 5-30 m/min; the diameter of the drawn optical fiber was 125. Mu.m.
Characterization of the prepared optical fiber, fig. 7 is a fiber microscope image of the prepared optical fiber of comparative example 1, the prepared optical fiber does not have the erbium-doped glass optical fiber core-in-package structure, the optical fiber is hollow, the core layer is air, the cladding layer is quartz, and the capability of restraining the light to transmit in the fiber core and the capability of serving as a gain medium are not provided.
The embodiments described above are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the embodiments described above, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principles of the present invention should be made in the equivalent manner, and are included in the scope of the present invention.
Claims (10)
1. An erbium-doped glass fiber as a gain medium, characterized in that: the glass fiber consists of a fiber core and a cladding, wherein the fiber core is prepared from the following raw materials in percentage by mole: percent (a),
SiO 2 ：77.5～98
Cs 2 CO 3 ：1～20
Er 2 O 3 ：0.5～2.5。
2. an erbium-doped glass fiber for use as a gain medium according to claim 1, wherein: the fiber core is prepared from the following raw materials in percentage by mole: percent (a),
SiO 2 ：83.5～94
Cs 2 CO 3 ：5～15
Er 2 O 3 ：1～1.5。
3. an erbium-doped glass fiber for use as a gain medium according to claim 1, wherein: the cladding is quartz glass;
the erbium-doped glass fiber used as the gain medium is prepared by a fiber core fusion method.
4. A method for preparing an erbium-doped glass fiber as a gain medium according to any one of claims 1 to 3, characterized in that: the method specifically comprises the following steps:
(1) Preparation of a core glass sintered body: uniformly mixing the raw materials, tabletting to obtain a block mixture, uniformly cutting into square slices, heating to obtain glass melt, cooling to room temperature to obtain erbium-doped glass, grinding into erbium-doped glass powder, and sintering at high temperature to obtain a fiber core glass sintered body through a mesh screen and a layering;
(2) Processing a preform rod: processing the fiber core glass sintered body into a rod shape, and placing the fiber core glass sintered rod into a tubular cladding material to obtain a prefabricated rod; the diameter of the fiber core glass sintering rod is smaller than the inner diameter of the tubular cladding material; the tubular cladding material is a quartz glass tube;
(3) And (3) drawing an optical fiber: and drawing the prefabricated rod into an optical fiber to obtain the erbium-doped glass optical fiber serving as the gain medium.
5. The method of manufacturing an erbium-doped glass fiber for use as a gain medium according to claim 4, wherein:
in the step (1), the uniform mixing is uniform grinding, and the heating is carried out by placing the mixture in a gas suspension melting furnace cavity and using CO 2 Heating by laser at 1700-2000 deg.C, sintering at 1300-1450 deg.C, and preserving heat for 4-6 h.
6. The method of manufacturing an erbium-doped glass fiber for use as a gain medium according to claim 4, wherein: in the step (1), the block mixture is a cylindrical flake block mixture with the diameter of 15-20 mm, the square flake size is 3mm x 3 mm-5 mm x 5mm, the pressure of the tabletting is 2-20Mpa, and the pressure is maintained for 2-5 min;
the pressure of the pressing bar is 10-30Mpa, the pressure is maintained for 10-20 min, and a cuboid block with the size of 40-50 mm, 8-10 mm and 4-5 mm is obtained.
7. The method of manufacturing an erbium-doped glass fiber for use as a gain medium according to claim 4, wherein:
the diameter of the fiber core glass sintering rod in the step (2) is 1-3mm, and the fiber core glass sintering rod is polished and pickled before being placed in a tubular cladding material.
8. The method of manufacturing an erbium-doped glass fiber for use as a gain medium according to claim 4, wherein: in step (1), when Cs 2 CO 3 When the mole percentage is higher than 10%, the raw materials are uniformly mixed, the obtained mixture is directly placed in a die for layering, and the fiber core glass sintered body is obtained after high-temperature sintering.
9. The method of manufacturing an erbium-doped glass fiber for use as a gain medium according to claim 4, wherein: drawing the optical fiber in an optical fiber drawing tower by the prefabricated rod in the step (3), wherein the drawing condition is that the prefabricated rod is fixed on the drawing tower, argon is introduced for protection, the drawing temperature is 2000-2100 ℃, the drawing speed is 5-30 m/min, and the diameter of the drawn optical fiber is 125 mu m;
the outer layer of the optical fiber is coated with ultraviolet light curing resin, and the diameter of the coating layer is 250 mu m.
10. Use of an erbium-doped glass fiber as gain medium according to any of claims 1 to 3 in a fiber laser, characterized in that: serving as a gain medium.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311066379.1A CN117263512A (en) | 2023-08-23 | 2023-08-23 | Erbium-doped glass fiber serving as gain medium and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311066379.1A CN117263512A (en) | 2023-08-23 | 2023-08-23 | Erbium-doped glass fiber serving as gain medium and preparation method and application thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1261332A (en) * | 1997-06-23 | 2000-07-26 | 康宁股份有限公司 | Composition for optical waveguide article and method for making continuous clad filament |
| CN113800774A (en) * | 2021-09-10 | 2021-12-17 | 华南理工大学 | Erbium-doped glass optical fiber used as gain medium and application thereof in optical fiber laser |
| CN114409263A (en) * | 2022-01-25 | 2022-04-29 | 华南理工大学 | Bismuth-doped multi-component glass optical fiber used as gain medium and preparation method thereof |
| CN116354598A (en) * | 2023-03-01 | 2023-06-30 | 华南理工大学 | Bismuth-gallium co-doped gain fiber serving as gain medium and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1261332A (en) * | 1997-06-23 | 2000-07-26 | 康宁股份有限公司 | Composition for optical waveguide article and method for making continuous clad filament |
| CN113800774A (en) * | 2021-09-10 | 2021-12-17 | 华南理工大学 | Erbium-doped glass optical fiber used as gain medium and application thereof in optical fiber laser |
| CN114409263A (en) * | 2022-01-25 | 2022-04-29 | 华南理工大学 | Bismuth-doped multi-component glass optical fiber used as gain medium and preparation method thereof |
| CN116354598A (en) * | 2023-03-01 | 2023-06-30 | 华南理工大学 | Bismuth-gallium co-doped gain fiber serving as gain medium and preparation method thereof |
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