CN108181683B - Low-crosstalk large-mode-area multi-core optical fiber and preparation method thereof - Google Patents
Low-crosstalk large-mode-area multi-core optical fiber and preparation method thereof Download PDFInfo
- Publication number
- CN108181683B CN108181683B CN201810225989.4A CN201810225989A CN108181683B CN 108181683 B CN108181683 B CN 108181683B CN 201810225989 A CN201810225989 A CN 201810225989A CN 108181683 B CN108181683 B CN 108181683B
- Authority
- CN
- China
- Prior art keywords
- core
- coating layer
- side cores
- optical fiber
- crosstalk
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- G02B6/02042—Multicore optical fibres
-
- 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
- G02B6/02004—Optical fibres with cladding with or without a coating characterised by the core effective area or mode field radius
- G02B6/02009—Large effective area or mode field radius, e.g. to reduce nonlinear effects in single mode fibres
-
- 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
- G02B6/03616—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference
- G02B6/03622—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 2 layers only
- G02B6/03627—Optical fibres characterised both by the number of different refractive index layers around the central core segment, i.e. around the innermost high index core layer, and their relative refractive index difference having 2 layers only arranged - +
Abstract
The invention relates to a low-crosstalk large-mode-area multi-core optical fiber and a preparation method thereof, which are characterized in that: the optical fiber comprises a middle core, a cladding layer I surrounding the middle core, and a plurality of side cores extending along the axis of the optical fiber and arranged in a regular polygon, and a cladding layer II covering the middle core, the cladding layer I and the side cores; the four parts of refractive indexes are sequentially the middle core, the side core, the coating layer I and the coating layer II from high to low by doping different elements in the process of manufacturing the middle core, the side core, the coating layer I and the coating layer II, so that the cross talk between the middle core and the side core can be effectively restrained, the principle that the refractive index of the coating layer I is lower than that of the middle core and the side core is utilized, the energy in the middle core is further restrained from leaking, the refractive index of the coating layer II is lowest and is positioned at the outermost side of the multi-core optical fiber, the energy leakage of the side core is restrained, the structural stability of the optical fiber is ensured, and the transmission efficiency of an optical signal is improved.
Description
Technical Field
The invention belongs to the technical field of optical fibers, and particularly relates to a low-crosstalk large-mode-area multi-core optical fiber and a preparation method thereof.
Background
In recent years, the rapid development of optical fiber communication and optical networks has prompted optical fibers capable of large-capacity transmission to be a research hotspot, such as few-mode optical fibers, multi-core optical fibers, and the like. The space division multiplexing-based multi-core optical fiber can realize the expansion of the optical fiber under the condition of not increasing the laying space and the cost of the optical cable, and the limit of the transmission capacity of the single-mode optical fiber is better overcome. The research on the multi-core optical fiber has important application prospect.
A multicore fiber is an optical fiber having a plurality of cores housed in the same cladding, and propagates an optical signal through the plurality of cores. Classified according to the working principle, are mainly classified into transmission type and coupling type multi-core optical fibers. Among them, the transmission type multi-core optical fiber is also called as a weak coupling type multi-core optical fiber, the core interval is large, the energy coupling between cores is small, and the mode in each core is independently transmitted, so that the transmission type multi-core optical fiber is mostly used for the large-capacity transmission of information. Recent research results show that multi-core optical fibers have played an important role in the fields of optical fiber communication and optical networks, for example, in terms of transmission capacity, a system transmission capacity of 2.15Pbit/s is achieved for a 22-core multi-core optical fiber of 31km length based on a double-annular core structure; in terms of transmission distance, the 12-core multi-core optical fiber with the 46km length based on the single-ring fiber core structure realizes the transmission of the furthest 26 circles of 105Tbit/s capacity optical signals accounting for 14350 km. In addition, the multi-core optical fiber can be used for developing important optoelectronic devices such as high-performance lasers, amplifiers, couplers and the like required by a large-capacity communication network. Multicore fibers have a significant role in the development of future high capacity communication systems.
The existing transmission type multi-core optical fiber mainly comprises: the groove auxiliary type multi-core optical fiber adopts the groove auxiliary type refractive index profile to reduce inter-core optical coupling and realize small inter-core distance and low crosstalk, but the scheme makes the refractive index design of the optical fiber complex, improves the manufacturing cost, needs to accurately control the refractive index distribution, and is not easy for large-scale commercial production; in another heterostructure multi-core optical fiber, inter-core crosstalk caused by bending of the optical fiber is reduced by increasing propagation constant difference of optical signals between core areas, but different fiber core designs of the scheme introduce optical transmission delay difference, so that transmission loss is increased, and higher requirements are provided for a production process and a welding process.
Chinese patent CN103376501B discloses a multicore optical fiber, a plurality of cores extending along the fiber axis; and an optical cladding formed of silica glass and surrounding the plurality of cores, wherein refractive index differences and diameters between two adjacent cores of the plurality of cores are different, a core structure variation parameter Δ (Δn)/(Δ (2 a) is a negative value, Δ (Δn) represents a refractive index difference variation between the cores and is expressed in percentage, Δ (2 a) represents a diameter variation between the cores and is expressed in micrometers, a time lag between optical signals propagating through the plurality of cores is 1ps/m or less, and a propagation constant difference between the two adjacent cores of the plurality of cores is greater than 0, the invention can reduce time lag and crosstalk between cores, but requires any two adjacent cores to be different in diameter in order to achieve the effect of reducing crosstalk, and the patent requires that an optical sheath having the same refractive index as the optical cladding is deposited outside each core and the cladding, the composition structure is complicated, and the core diameter is small, and the optical cladding is deposited outside the core thickness is small, and the manufacturing process is high in precision, and the manufacturing cost is increased.
Chinese patent CN105837025a discloses a method for preparing a doped optical fiber preform with high efficiency and a doped optical fiber preform, and relates to the field of optical fiber preforms. The method comprises the following steps: preparing a doping solution from rare earth materials or functional metal materials and a codopant, mixing high-purity quartz powder with the doping solution, drying for 12-48 hours at 100-150 ℃, crushing and screening to obtain doped quartz powder; depositing doped quartz powder on the surface of a target rod to form a doped core layer; replacing the doped quartz powder with high-purity quartz powder, so that the high-purity quartz powder is deposited on the surface of the doped core layer to form a quartz outer cladding layer; and removing the target rod, and gradually shrinking the whole body formed by the doped core layer and the quartz outer cladding layer at high temperature to obtain the doped optical fiber preform. Although the method can effectively reduce the introduction of impurities and improve the doping uniformity of the optical fiber preform; however, the method is complicated in process and is only used for preparing single-core optical fiber preformed bars.
Chinese patent CN107601838A discloses a method for manufacturing a multi-core optical fiber preform, wherein the manufactured optical fiber comprises a plurality of independent cores, and a core and a preform cladding are manufactured respectively, the core comprises a core and a core cladding, and the core is manufactured by a chemical vapor deposition VAD process and doped with germanium; the core cladding is prepared by VAD technology, and is perforated after fluorine-doped sintering sleeve column; and then the cores and the core cladding are fused and contracted to form fiber cores, and the fiber cores are inserted into corresponding deep holes of the preform cladding, but the method has complex process and needs to be provided with a core cladding for each core so as to achieve the purpose of no crosstalk.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the low-crosstalk large-mode-area multi-core optical fiber and the preparation method thereof, so as to solve the problems of complex design of refractive index, high technical cost and high production difficulty of the low-crosstalk large-mode-area multi-core optical fiber for large-capacity transmission.
The technical scheme of the invention is as follows: a low-crosstalk large-mode-area multi-core fiber, characterized by: the optical fiber comprises a middle core, a coating layer I surrounding the middle core, and a plurality of side cores extending along the axis of the optical fiber and arranged in a regular polygon, and a coating layer II covering the middle core, the coating layer I and the side cores.
Further, the center core has a highest effective refractive index n1, the plurality of side cores have the same second high effective refractive index n2, the cladding layer I has a third high effective refractive index n3, the cladding layer II has a fourth high effective refractive index n4, and n1 > n2 > n3 > n4, n4 > 1.4500, the difference between n1 and n2 is an arbitrary value in the range of 0.0001-0.0010, the difference between n1 and n3 is an arbitrary value in the range of 0.0010-0.0050, the difference between n2 and n3 is an arbitrary value in the range of 0.0001-0.0010, and the difference between n3 and n4 is an arbitrary value in the range of 0.0010-0.0050.
Further, the core diameter of the middle core is in the range of 8-10 μm, the diameter of the cladding layer I is in the range of 22-27 μm, the diameters of any two of the plurality of side cores may be the same or different, the diameter of the side core is in the range of 8-10 μm, the cladding layer II forms a pore-free structure and covers the middle core, the cladding layer I and the plurality of side cores, and the diameter of the cladding layer II is any value in the range of 120-130 μm.
Further, the plurality of side cores are arranged densely to form regular polygons outside the middle core, the number of the side cores is not less than 3, preferably 6, the core spacing between any two adjacent side cores in the plurality of side cores is any value in the range of 33.5-42 μm and is not contacted with each other, the core spacing between any side core in the regular polygons formed by the plurality of side cores is the same, and the core spacing is any value in the range of 33.5-42 μm.
The invention also provides a preparation method of the low-crosstalk large-mode-area multi-core optical fiber, which is characterized by comprising the following steps of:
preparation of a core, deposition of high purity SiO selectively doped with metallic or non-metallic elements on a glass sleeve 2 Preparing a central core;
preparing a coating layer I, and performing vapor deposition doping silicon dioxide on the outside of the central shaft to form the coating layer I;
preparing a coating layer II, and vapor depositing fluorine-doped silicon dioxide axially outside the coating layer I to form the coating layer II;
preparing side cores, punching holes on the coating layer II by using a drilling process, and depositing a plurality of side cores in the holes;
drawing to form the multi-core optical fiber.
Further, the metal element is one or any combination of germanium, antimony, erbium, ytterbium, praseodymium, thulium, sodium and potassium, and one component is germanium element during any combination, wherein the germanium element is selected from GeCl 4 、GeBr 4 、GeF 4 、GeO 2 、GeNa 2 O 3 One or the combination of any two of the above, the doping amount of the metal element is not higher than 9 percent by mole percent; the nonmetallic element is phosphorus, and the phosphorus element is selected from P 2 O 5 、POCl 3 、PCl 3 、PCl 5 One or any combination of the above, the doping amount of nonmetallic elements is not higher than 5% of mole percent, preferably single element germanium is doped when the core is prepared, the doping amount of germanium element is not higher than 9% of mole percent, preferably 3.3%, and the germanium element is selected from GeO 2 ，GeO 2 Uniformly dispersed in SiO 2 Is a kind of medium.
Further, the doped silicon dioxide is formed by SiCl with the purity of 99.99 percent 4 Mixing the silicon dioxide and the dopant according to a certain proportion, uniformly stirring, obtaining doped silicon dioxide under the action of oxyhydrogen flame, and axially depositing the doped silicon dioxide on the surface of the central core to form a coating layer I; the dopant is ZrF 4 、SiF 4 、AlF 3 、NaF、BCl 3 、BF 3 、NaBO 2 One or any two of the above are combined, and when the dopant is solid, the particle size of the solid particlesNot greater than 100nm, preferably SiF 4 ，SiCl 4 With SiF 4 Stirring and mixing uniformly in an environment with temperature lower than 30deg.C, depositing on the surface of the central core under the action of oxyhydrogen flame to form a coating layer I, wherein the doping amount of the dopant is not higher than 10% of the molar percentage, siF 4 The doping amount of (2) is preferably 1% by mole.
Further, the fluorine element in the coating layer II is ZrF 4 、SiF 4 、AlF 3 、NaF、BF 3 One or two of the compositions are combined, and the physical state of the compositions is consistent when the two are combined, preferably ZrF 4 In combination with NaF, the molar ratio of fluorine elements is 10:1, and the doping amount of fluorine elements in the coating layer II is not higher than 11% by mole, preferably 3%.
Further, the punching is that a laser puncher simultaneously drills holes at multiple positions on one end face of the coating layer II, distances between adjacent holes are the same, any two holes are free from crossing in space and parallel to each other, the roughness in the holes is not more than 0.012 mu m, and the number of the holes is not less than 3, preferably 6.
Further, the plurality of side cores in the hole are one of silicon dioxide with the purity of 99.99 percent and germanium-doped silicon dioxide, and the doping amount of germanium element in the germanium-doped silicon dioxide is not higher than 5 percent, preferably 2.2 percent of mole percent.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention is provided with the cladding layer I outside the middle core, and the effective refractive index n3 of the cladding layer I is far smaller than the effective refractive index n1 of the middle core, so that the energy of the middle core is effectively limited not to leak.
(2) The invention is provided with the side cores which are arranged at equal intervals outside the middle core and on the coating layer II, and the side cores are arranged at the periphery of the middle core in a dense arrangement mode, so that the toughness reduction caused by overlarge fiber diameter due to overlarge side cores can be effectively prevented, and the increase of the additional loss of the optical fiber caused by overlarge core spacing between a plurality of side cores and the middle core is restrained.
(3) The invention sets different refractive indexes for the central core, the side core, the coating layer I and the coating layer II, and the relation of the refractive indexes is as follows: n1 is larger than n2 and n3 is larger than n4, and the refractive index gradient difference is set, so that the beneficial effect of low crosstalk in the multi-core optical fiber can be effectively realized, and the light loss is reduced.
(4) According to the preparation method of the low-crosstalk large-mode-area multi-core optical fiber, provided by the invention, the change of the refractive index is achieved by doping different elements, and the requirements on different refractive indexes are met according to the properties of the elements.
(5) According to the preparation method of the low-crosstalk large-mode-area multi-core optical fiber, provided by the invention, the deposition coating layer I and the deposition coating layer II adopt an axial external vapor deposition technology, the process is simple, the size limitation of the in-tube deposition technology can be broken through, and the production efficiency is improved.
Drawings
FIG. 1 is a cross-sectional view of a low-crosstalk large-mode-area multi-core fiber;
FIG. 2 is a flow chart of the preparation of a low-crosstalk large-mode-area multi-core fiber.
The labels in fig. 1 are as follows: 1. a central core; 3. a coating layer I;2 a-2 f, a side core; 4. coating layer II.
Detailed Description
Example 1
The invention will be described in further detail below with reference to the drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, a low-crosstalk large-mode-area multi-core fiber and a preparation method thereof are provided, wherein: comprises a central core 1, a coating layer I3 surrounding the central core 1, and a plurality of side cores 2 a-2 f extending along the axis of the optical fiber and arranged in a regular polygon, and a coating layer II4 covering the central core 1, the coating layer I3 and the side cores 2 a-2 f.
Further, the core 1 has the highest effective refractive index n1, where n1 is 1.4580, the plurality of side cores 2 a-2 f have the same second high effective refractive index n2, n2 is 1.4573, the cladding layer I3 has the third high effective refractive index n3, n3 is 1.4560, the cladding layer II4 has the fourth high effective refractive index n4, n4 is 1.4540, n1 > n2 > n3 > n4, the difference between n1 and n2 is 0.0007, the difference between n1 and n3 is 0.0020, the difference between n2 and n3 is 0.0013, and the difference between n3 and n4 is 0.0020.
Further, the core diameter of the center core 1 is in the range of 8 to 10 μm, preferably 8.4 μm, the diameter of the clad layer I is in the range of 22 to 27 μm, preferably 25 μm, the diameters of any two of the plurality of side cores 2a to 2f may be the same or different, the diameters of the plurality of side cores 2a to 2f are different, the diameters of the side cores 2a to 2f are in an equal-difference array, the diameter of the side core 2a is 8.0 μm, the tolerance is 0.1 μm, the diameter of the side core 2f is calculated according to this method to be 8.5 μm, the clad layer II4 is formed in a pore-free structure and covers the center core, the clad layer I3 and the plurality of side cores 2a to 2f, and the diameter of the clad layer II is any value of 120 to 130 μm, preferably 125 μm.
Further, the plurality of side cores 2a to 2f are arranged densely to form a regular polygon outside the center core 1, the number of side cores is not less than 3, preferably 6, the core pitch of any two adjacent side cores in the plurality of side cores 2a to 2f is any value in the range of 33.5 to 42 μm, preferably 35.5 μm, and are not in contact with each other, the core pitch from any one side core to the center core in the regular polygon formed by the plurality of side cores 2a to 2f is the same, and the core pitch is any value in the range of 33.5 to 42 μm, preferably 35.5 μm.
Example 2
As shown in fig. 2, a low-crosstalk large-mode-area multi-core optical fiber and a preparation method thereof are characterized by comprising the following steps:
preparation of the core 1, deposition of SiO of high purity selectively doped with metallic or non-metallic elements on a glass sleeve 2 Preparing a central core;
preparing a coating layer I3, and performing vapor deposition doping silicon dioxide on the outside of the central shaft to form the coating layer I;
preparing a coating layer II4, and vapor depositing fluorine-doped silicon dioxide axially outside the coating layer I to form the coating layer II;
preparing a side core 2, punching holes on the coating layer II by using a drilling process, and depositing a plurality of side cores in the holes;
drawing to form the multi-core optical fiber.
Further, the metal element is germanium, antimony, erbium,Ytterbium, praseodymium, thulium, sodium and potassium or any combination thereof, wherein one component is germanium element during any combination, and the germanium element is selected from GeCl 4 、GeBr 4 、GeF 4 、GeO 2 、GeNa 2 O 3 One or the combination of any two of the above, the doping amount of the metal element is not higher than 9 percent by mole percent; the nonmetallic element is phosphorus, and the phosphorus element is selected from P 2 O 5 、POCl 3 、PCl 3 、PCl 5 One or any combination of the above, the doping amount of nonmetallic elements is not higher than 5% of mole percent, preferably single element germanium is doped when the core is prepared, the doping amount of germanium element is not higher than 9% of mole percent, preferably 3.3%, and the germanium element is selected from GeO 2 ，GeO 2 Uniformly dispersed in SiO 2 Is a kind of medium.
Further, the doped silicon dioxide is formed by SiCl with the purity of 99.99 percent 4 Mixing the silicon dioxide with the doping agent according to a certain proportion, uniformly stirring the silicon dioxide, obtaining doped silicon dioxide under the action of oxyhydrogen flame, and axially depositing the doped silicon dioxide on the surface of the central core 1 to form a coating layer I3; the dopant is ZrF 4 、SiF 4 、AlF 3 、NaF、BCl 3 、BF 3 、NaBO 2 One or two of the above materials are combined, when the dopant is solid, the particle size of solid particles is not more than 100nm, zrF is selected 4 Milling and sieving the dopant as single dopant to obtain ZrF with solid particle size less than 100nm 4 And ZrF is taken 4 Particle addition of SiCl 4 Uniformly dispersing, depositing on the surface of the central core 1 under the action of oxyhydrogen flame to form a coating layer I3, wherein the doping amount of the dopant is not more than 10 mol percent, zrF 4 The doping amount of (2) is preferably 1% by mole.
Further, the fluorine element in the coating layer II4 is ZrF 4 、SiF 4 、AlF 3 、NaF、BF 3 One or two of the compositions are combined, and the physical state of the compositions is consistent when the two are combined, preferably ZrF 4 In combination with NaF, the molar ratio of fluorine elements is 10:1, and the doping amount of fluorine elements in the coating layer II4 is not higher than 11% by mole, preferably 3%.
Further, the punching is that a laser puncher simultaneously drills holes at multiple positions on one end face of the coating layer II4, distances between adjacent holes are the same, any two holes are free from crossing in space and parallel to each other, the roughness in the holes is not more than 0.012 mu m, and the number of the holes is not less than 3, preferably 6.
Further, the plurality of side cores 2a to 2f in the hole are one of silicon dioxide with a purity of 99.99% and germanium-doped silicon dioxide, wherein the germanium-doped silicon dioxide is selected, and the doping amount of germanium element in the germanium-doped silicon dioxide is not more than 5% by mole, preferably 2.2%.
Further, the above-mentioned production materials are subjected to a drawing process to produce a multi-core optical fiber.
While the foregoing description illustrates and describes the preferred embodiments of the present invention, as noted above, it is to be understood that the invention is not limited to the forms disclosed herein but is not to be construed as excluding other embodiments, and that various other combinations, modifications and environments are possible and may be made within the scope of the inventive concepts described herein, either by way of the foregoing teachings or by those of skill or knowledge of the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the invention as defined in the appended claims.
Claims (8)
1. A low-crosstalk large-mode-area multi-core optical fiber comprises a middle core (1), a coating layer I (3) surrounding the middle core (1), and a plurality of side cores (2 a-2 f) extending along the axis of the optical fiber and arranged in a regular polygon, and a coating layer II (4) covering the middle core (1), the coating layer I (3) and the plurality of side cores (2 a-2 f); the middle core (1) has the highest effective refractive index n1, the plurality of side cores (2 a-2 f) has the second high effective refractive index n2, the coating layer I (3) has the third high effective refractive index n3, the coating layer II (4) has the fourth high effective refractive index n4, n1 is more than n2 and more than n3 and more than n4, n4 is more than 1.4500, the difference value between n1 and n2 is any value in the range of 0.0001-0.0010, the difference value between n1 and n3 is any value in the range of 0.0010-0.0050, the difference value between n2 and n3 is any value in the range of 0.0001-0.0010, and the difference value between n3 and n4 is any value in the range of 0.0010-0.0050; the diameter of the middle core (1) ranges from 8 to 10 mu m, the diameter of the coating layer I (3) ranges from 22 to 27 mu m, the diameters of any two side cores in the plurality of side cores (2 a-2 f) can be the same or different, the diameter of the side cores ranges from 8 to 10 mu m, the coating layer II (4) forms a pore-free structure and covers the middle core (1), the coating layer I (3) and the plurality of side cores (2 a-2 f), and the diameter of the coating layer II (4) is any value in the range from 120 to 130 mu m.
2. A low-crosstalk large-mode-area multi-core fiber according to claim 1, characterized in that: the plurality of side cores (2 a-2 f) are arranged densely to form a regular polygon outside the middle core (1), the number of the side cores (2 a-2 f) is not lower than 3, the core spacing between any two adjacent side cores in the plurality of side cores (2 a-2 f) is any value in the range of 33.5-42 mu m and is not contacted with each other, the core spacing between any side core in the regular polygon formed by the plurality of side cores (2 a-2 f) and the middle core (1) is the same, and the core spacing is any value in the range of 33.5-42 mu m.
3. A method for preparing a low-crosstalk large-mode-area multi-core optical fiber, characterized by comprising the steps of:
preparation of the core (1) by deposition of SiO of high purity selectively doped with metallic or non-metallic elements on a glass sleeve 2 Preparing a central core (1);
preparing a coating layer I (3), and performing vapor deposition doping silicon dioxide on the axially outer part of the central core (1) to form the coating layer I (3);
preparing a coating layer II (4), and vapor depositing fluorine-doped silicon dioxide axially outside the coating layer I (3) to form the coating layer II (4);
preparing side cores (2 a-2 f), punching holes on the coating layer II (4) by using a drilling process, and depositing a plurality of side cores (2 a-2 f) in the holes;
drawing to form the multi-core optical fiber.
4. A method of preparing a low-crosstalk large-mode-area multi-core fiber according to claim 3, characterized by: the metal element is germanium, antimony, erbium, ytterbium, praseodymium, thulium and sodiumOne or any combination of potassium, wherein one component is germanium element selected from GeCl 4 、GeBr 4 、GeF 4 、GeO 2 、GeNa 2 O 3 One or the combination of any two of the above, the doping amount of the metal element is not higher than 9 percent by mole percent; the nonmetallic element is phosphorus, and the phosphorus element is selected from P 2 O 5 、POCl 3 、PCl 3 、PCl 5 One or any combination of the above, the doping amount of the nonmetallic elements is not more than 5 percent of the mole percent.
5. A method of preparing a low-crosstalk large-mode-area multi-core fiber according to claim 3, characterized by: the doped silicon dioxide is prepared from SiCl with the purity of 99.99 percent 4 Mixing the silicon dioxide and the dopant according to a certain proportion, uniformly stirring, obtaining doped silicon dioxide under the action of oxyhydrogen flame, and axially depositing the doped silicon dioxide on the surface of the central core (1) to form a coating layer I (3); the dopant is ZrF 4 、SiF 4 、AlF 3 、NaF、BCl 3 、BF 3 、NaBO 2 When the doping agent is solid, the particle size of the solid particles is not more than 100nm, and the doping amount of the doping agent is not more than 10 percent of the mole percent.
6. A method of preparing a low-crosstalk large-mode-area multi-core fiber according to claim 3, characterized by: the fluorine element in the coating layer II is ZrF 4 、SiF 4 、AlF 3 、NaF、BF 3 When any two are combined, the physical states are consistent, and the doping amount of fluorine is not higher than 11 percent by mole percent.
7. A method of preparing a low-crosstalk large-mode-area multi-core fiber according to claim 3, characterized by: the punching is that a laser puncher simultaneously drills holes at multiple positions on one end face of the coating layer II, any two holes are not crossed and parallel in space, the roughness in the holes is not more than 0.012 mu m, and the number of the holes is not less than 3.
8. A method of preparing a low-crosstalk large-mode-area multi-core fiber according to claim 3, characterized by: the multiple side cores in the holes are one of silicon dioxide with the purity of 99.99 percent and germanium-doped silicon dioxide, and the doping amount of germanium element in the germanium-doped silicon dioxide is not higher than 5 percent by mole percent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810225989.4A CN108181683B (en) | 2018-03-19 | 2018-03-19 | Low-crosstalk large-mode-area multi-core optical fiber and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810225989.4A CN108181683B (en) | 2018-03-19 | 2018-03-19 | Low-crosstalk large-mode-area multi-core optical fiber and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108181683A CN108181683A (en) | 2018-06-19 |
| CN108181683B true CN108181683B (en) | 2023-08-29 |
Family
ID=62553821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810225989.4A Active CN108181683B (en) | 2018-03-19 | 2018-03-19 | Low-crosstalk large-mode-area multi-core optical fiber and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108181683B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109283613A (en) * | 2018-11-26 | 2019-01-29 | 北京交通大学 | Crosstalk multi-core optical fiber between a kind of low core |
| CN111897043B (en) * | 2020-07-20 | 2022-07-05 | 江苏永鼎股份有限公司 | Large mode field microstructure optical fiber |
| WO2022165642A1 (en) * | 2021-02-02 | 2022-08-11 | 欧菲光集团股份有限公司 | Lens and photographing terminal having same |
| CN114384653B (en) * | 2022-01-12 | 2024-03-19 | 中天宽带技术有限公司 | Silicon optical module based on heterogeneous multi-core optical fiber |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425335A (en) * | 2015-12-17 | 2016-03-23 | 长飞光纤光缆股份有限公司 | Anti-bending multi-core optical fiber for communication |
| JP2016075938A (en) * | 2010-11-08 | 2016-05-12 | 株式会社フジクラ | Multi-core fiber |
| CN107601838A (en) * | 2017-10-26 | 2018-01-19 | 江苏亨通光导新材料有限公司 | A kind of manufacture method of multi-core fiber prefabricated rods |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5982992B2 (en) * | 2012-04-25 | 2016-08-31 | 住友電気工業株式会社 | Multi-core optical fiber |
| JP5635056B2 (en) * | 2012-11-07 | 2014-12-03 | 株式会社フジクラ | Amplifying optical fiber and optical amplifier |
-
2018
- 2018-03-19 CN CN201810225989.4A patent/CN108181683B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016075938A (en) * | 2010-11-08 | 2016-05-12 | 株式会社フジクラ | Multi-core fiber |
| CN105425335A (en) * | 2015-12-17 | 2016-03-23 | 长飞光纤光缆股份有限公司 | Anti-bending multi-core optical fiber for communication |
| CN107601838A (en) * | 2017-10-26 | 2018-01-19 | 江苏亨通光导新材料有限公司 | A kind of manufacture method of multi-core fiber prefabricated rods |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108181683A (en) | 2018-06-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108181683B (en) | Low-crosstalk large-mode-area multi-core optical fiber and preparation method thereof | |
| EP2700988B1 (en) | Bending-resistant large core diameter high numerical aperture multimode fiber | |
| CN105204110B (en) | A kind of less fundamental mode optical fibre with relatively low differential mode group delay | |
| KR101668485B1 (en) | Single mode optical fibre | |
| CN106443876B (en) | A kind of low crosstalk less fundamental mode optical fibre | |
| CN102096145B (en) | Multi-core polarization maintaining fiber and manufacturing method thereof | |
| JP2007536580A (en) | Long wavelength pure silica core single mode fiber and method of forming the fiber | |
| CN104291676B (en) | A kind of manufacture method of large scale bend-insensitive multimode optical fiber preform | |
| CN107601838A (en) | A kind of manufacture method of multi-core fiber prefabricated rods | |
| CN110244404B (en) | Low-attenuation ring-shaped fiber core optical fiber | |
| CN105759344B (en) | A kind of anti-bending multimode fiber | |
| CN106324749B (en) | Few-mode optical fiber for amplifier | |
| CN102225843B (en) | Method for producing fiber prefabricated rod | |
| CN112346170B (en) | Double-groove surrounding type multi-core few-mode optical fiber based on space division-mode division multiplexing technology | |
| CN104216045A (en) | Optical fiber and manufacturing method thereof | |
| CN103472525B (en) | Low-loss large-effective area single mode fiber and manufacturing method thereof | |
| CN107608023A (en) | A kind of ultralow decay less fundamental mode optical fibre of step change type | |
| CN105223645A (en) | A kind of low loss fiber and preparation method thereof | |
| CN111443419B (en) | Large-mode-field bending-resistant multi-core few-mode optical fiber | |
| CN104261670A (en) | Method for manufacturing optical fiber | |
| JP2023536451A (en) | Low crosstalk multicore optical fiber for single mode operation | |
| CN102092936B (en) | Preparation method of optical fiber preform | |
| CN110937796B (en) | Method for manufacturing broadband multimode optical fiber preform | |
| CN110981183B (en) | Manufacturing method of broadband multimode optical fiber preform | |
| CN113831011A (en) | Large-size multi-core optical fiber preform preparation method based on gapless splicing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: No. 219, Beihai West Road, Haimen Street, Haimen District, Nantong City, Jiangsu Province 226199 Applicant after: Jiangsu Sterlite Tongguang Fiber Co.,Ltd. Address before: 226100 219 Beihai West Road, Haimen City, Nantong City, Jiangsu Province Applicant before: JIANGSU STERLITE TONGGUANG FIBER Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |