CN114488387B - Single mode fiber capable of inhibiting stimulated Brillouin scattering - Google Patents
Single mode fiber capable of inhibiting stimulated Brillouin scattering Download PDFInfo
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- CN114488387B CN114488387B CN202210075825.4A CN202210075825A CN114488387B CN 114488387 B CN114488387 B CN 114488387B CN 202210075825 A CN202210075825 A CN 202210075825A CN 114488387 B CN114488387 B CN 114488387B
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- 239000000835 fiber Substances 0.000 title claims abstract description 39
- 230000002401 inhibitory effect Effects 0.000 title claims abstract description 8
- 238000005253 cladding Methods 0.000 claims abstract description 135
- 239000000463 material Substances 0.000 claims abstract description 90
- 239000011521 glass Substances 0.000 claims abstract description 37
- 239000013307 optical fiber Substances 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 20
- 229910052731 fluorine Inorganic materials 0.000 claims description 10
- 239000011737 fluorine Substances 0.000 claims description 10
- 229910052732 germanium Inorganic materials 0.000 claims description 10
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 10
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 10
- 229910052689 Holmium Inorganic materials 0.000 claims description 3
- 229910052779 Neodymium Inorganic materials 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 229910052775 Thulium Inorganic materials 0.000 claims description 3
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- -1 bait Chemical compound 0.000 claims description 3
- KJZYNXUDTRRSPN-UHFFFAOYSA-N holmium atom Chemical compound [Ho] KJZYNXUDTRRSPN-UHFFFAOYSA-N 0.000 claims description 3
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 239000011593 sulfur Substances 0.000 claims description 3
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 claims description 3
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000009977 dual effect Effects 0.000 description 3
- 230000009022 nonlinear effect Effects 0.000 description 3
- 150000002910 rare earth metals Chemical class 0.000 description 3
- 230000001627 detrimental effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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
- G02B6/02295—Microstructured optical fibre
- G02B6/02314—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes
- G02B6/02319—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes characterised by core or core-cladding interface features
- G02B6/02323—Core having lower refractive index than cladding, e.g. photonic band gap guiding
-
- 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
- G02B6/03605—Highest refractive index not on central axis
-
- 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
- G02B6/03638—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 3 layers only
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Glass Compositions (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
- Lasers (AREA)
Abstract
The invention provides a single-mode optical fiber for inhibiting stimulated Brillouin scattering, and relates to the field of optical fibers; the single mode optical fiber includes: a fiber core formed by stacking glass rods of a first material; the first material has a first refractive index n 1 And a first sound propagation velocity v 1 The method comprises the steps of carrying out a first treatment on the surface of the The inner cladding comprises a first inner cladding structure, a second inner cladding structure and a third inner cladding structure; the first inner cladding structure is formed by stacking glass tubes of a second material; the third inner cladding structure is arranged on the outer side of the first inner cladding structure and is made of a second material; the second inner cladding structure penetrates through the first inner cladding structure and is formed by continuously arranging channel units; the channel unit is a glass rod of a second material or a concentric glass rod formed by the second material and a third material; the second material has a second refractive index n 2 And a second sound propagation velocity v 2 The method comprises the steps of carrying out a first treatment on the surface of the The third material has a third refractive index n 3 The method comprises the steps of carrying out a first treatment on the surface of the Wherein n is 1 ≤n 2 ，n 2 ＞n 3 ，1≤v 1 /v 2 Less than or equal to 1.1; the invention can effectively inhibit stimulated Brillouin scattering.
Description
Technical Field
The invention relates to the field of optical fibers, in particular to a single-mode optical fiber for inhibiting stimulated Brillouin scattering.
Background
Because of many advantages of optical fibers, such as easy heat dissipation, small space occupation, good beam quality, etc., the mainstream of optical fiber lasers has been gradually developed, and has wide application in scientific research, medical treatment, industrial fields, etc. The optical fiber determines the index limit of the optical fiber laser, and is a core device of the optical fiber laser, so that one of the important points in developing the optical fiber laser is to develop the optical fiber. With the increasing precision and high-end of the manufacturing industry, the requirements for the index of the fiber laser are becoming more and more stringent, and in specific applications, the pulse width needs to be as narrow as possible, and a narrower pulse requires a fiber with a larger mode field diameter to reduce the detrimental nonlinear effects.
The narrow linewidth nanosecond laser has the advantages of good monochromaticity, high peak power, good coherence and the like, and has good application prospect. The existing narrow linewidth nanosecond laser is easy to generate stimulated Brillouin scattering nonlinear effect in the optical fiber, and the usability of the narrow linewidth nanosecond laser is affected. Unlike the above-described detrimental nonlinear effects of reducing the mode field diameter by increasing the mode field diameter, the effect of suppressing stimulated brillouin scattering by increasing the mode field diameter is relatively limited, and in addition, an additional method is required to suppress stimulated brillouin scattering together.
Disclosure of Invention
The invention aims to solve the technical problem that the existing narrow linewidth nanosecond laser is easy to generate stimulated Brillouin scattering in an optical fiber.
The invention provides a single mode fiber for inhibiting stimulated Brillouin scattering, which comprises the following components:
a fiber core formed by stacking glass rods of a first material; the first material has a first refractive index n 1 And a first sound propagation velocity v 1 ；
The inner cladding comprises a first inner cladding structure, a second inner cladding structure and a third inner cladding structure; the first inner cladding structure is arranged on the outer side of the fiber core in a cladding mode and is formed by stacking glass tubes of a second material; a first air hole is formed in the first inner cladding structure, and the first air hole is formed along the axial direction of the fiber core; the third inner cladding structure is arranged outside the first inner cladding structure in a cladding way and is made of the second material; the second inner cladding structure is arranged between the fiber core and the fiberThe third inner cladding structures penetrate through the first inner cladding structures; the second inner cladding structure is formed by continuously arranging channel units; the channel unit is a glass rod of the second material or a concentric glass rod formed by the second material and the third material; the second material has a second refractive index n 2 And a second sound propagation velocity v 2 The method comprises the steps of carrying out a first treatment on the surface of the The third material has a third refractive index n 3 The method comprises the steps of carrying out a first treatment on the surface of the Wherein n is 1 ≤n 2 ，n 2 ＞n 3 ，1≤v 1 /v 2 ≤1.1。
Further, the single mode fiber for inhibiting stimulated brillouin scattering further comprises an air cladding; the air cladding is arranged on the outer side of the inner cladding in a cladding mode and is formed by surrounding and arranging quartz glass tubes; a second air hole is formed in the air cladding along the axial direction of the fiber core; the second air holes are distributed in the air layer in a ring shape.
Further, the single-mode optical fiber for suppressing stimulated brillouin scattering further comprises an outer cladding layer; the outer cladding layer is arranged outside the air cladding layer in a cladding mode and is made of a quartz glass tube.
Further, the mode field diameter of the single mode fiber is greater than 30 microns.
Further, at least one rare earth element is doped in the first material; the rare earth element comprises ytterbium, neodymium, bait, holmium or thulium.
Further, the first material is doped with at least one co-doping element; the co-doping element comprises aluminum, phosphorus, sulfur, germanium or fluorine.
Further, the second material is germanium-doped quartz glass; or the second material is germanium and fluorine co-doped quartz glass.
Further, when the channel unit is a concentric glass rod composed of the second material and the third material, the third material cladding is disposed outside the second material, or the second material cladding is disposed outside the third material.
Further, the third material is fluorine-doped quartz glass.
Further, the cross section of the second inner cladding structure is in a straight line shape or a broken line shape.
The technical scheme provided by the embodiment of the invention has the beneficial effects that: the single-mode optical fiber for inhibiting stimulated Brillouin scattering comprises a fiber core, wherein the fiber core is formed by stacking glass rods of a first material; the first material has a first refractive index n 1 And a first sound propagation velocity v 1 The method comprises the steps of carrying out a first treatment on the surface of the The inner cladding comprises a first inner cladding structure, a second inner cladding structure and a third inner cladding structure; the first inner cladding structure is arranged on the outer side of the fiber core in a cladding mode and is formed by stacking glass tubes of a second material; a first air hole is formed in the first inner cladding structure, and the first air hole is formed along the axial direction of the fiber core; the third inner cladding structure is arranged outside the first inner cladding structure in a cladding way and is made of the second material; the second inner cladding structure is arranged between the fiber core and the third inner cladding structure and penetrates through the first inner cladding structure; the second inner cladding structure is formed by continuously arranging channel units; the channel unit is a glass rod of the second material or a concentric glass rod formed by the second material and the third material; the second material has a second refractive index n 2 And a second sound propagation velocity v 2 The method comprises the steps of carrying out a first treatment on the surface of the The third material has a third refractive index n 3 The method comprises the steps of carrying out a first treatment on the surface of the Wherein n is 1 ≤n 2 ，n 2 ＞n 3 ，1≤v 1 /v 2 Less than or equal to 1.1; through the first sound propagation velocity v 1 And the second sound propagation velocity v 2 Is arranged to enhance the leakage of phonons in the core; meanwhile, due to the arrangement of the first inner cladding structure and the second inner cladding structure, phonons are easy to leak from the second inner cladding structure, finally, the phonons in the fiber core have high leakage loss, the leakage loss is not lower than 3dB/m, the phonons are difficult to stay in the fiber core, the coupling strength of the phonons and photons is reduced, the threshold value of stimulated Brillouin scattering is improved, and further stimulated Brillouin scattering is effectively inhibited.
Drawings
FIG. 1 is a schematic diagram of a single mode optical fiber for suppressing stimulated Brillouin scattering in embodiment 1 of the present invention;
FIG. 2 is a schematic diagram of the core and inner cladding structure of a single mode fiber with stimulated Brillouin scattering suppressed in embodiment 1 of the present invention;
fig. 3 is a schematic structural diagram of the channel unit 221 in fig. 2;
fig. 4 is another schematic structural diagram of the channel unit 221 in fig. 2;
fig. 5 is a schematic diagram of another structure of the channel unit 221 in fig. 2;
FIG. 6 is a schematic diagram of the core and inner cladding structures of a single mode fiber with stimulated Brillouin scattering suppressed in embodiment 2 of the present invention;
FIG. 7 is a schematic diagram of the core and inner cladding structures of a single mode fiber with stimulated Brillouin scattering suppressed in embodiment 3 of the present invention;
wherein, 100, fiber core; 110. a glass rod of a first material; 200. an inner cladding; 210. a first inner cladding structure; 211. a first air hole; 220. a second inner cladding structure; 221. a channel unit; 230. a third inner cladding structure; 300. an air cladding; 310. a second air hole; 400. and an outer cladding.
Detailed Description
Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and together with the description serve to explain the principles of the invention, and are not intended to limit the scope of the invention.
Example 1
Referring to fig. 1 to 3, an embodiment of the present invention provides a single mode fiber for suppressing stimulated brillouin scattering, which includes a core 100, an inner cladding 200, an air cladding 300, and an outer cladding 400 sequentially disposed from inside to outside;
the core 100 is formed by stacking glass rods 110 of a first material; the first material has a first refractive index n 1 And a first sound propagation velocity v 1 ；
The inner cladding 200 includes a first inner cladding structure 210, a second inner cladding structureA cladding layer structure 220 and a third inner cladding layer structure 230; the first inner cladding structure 210 is arranged outside the fiber core 100 in a cladding manner and is formed by stacking capillary glass tubes of a second material; the first inner cladding structure 210 is provided with a first air hole 211, and the first air hole 211 is disposed along the axial direction of the core 100; the first air holes 211 are arranged in an array; the third inner cladding structure 230 is wrapped and arranged on the outer side of the first inner cladding structure 210, is made of the second material, and is a uniform solid medium; the second inner cladding structure 220 is disposed between the core 100 and the third inner cladding structure 230 and extends through the first inner cladding structure 210; the second inner cladding layer structure 220 is formed by continuously arranging the channel units 221; the channel unit 221 is a solid glass rod of the second material; the second material has a second refractive index n 2 And a second sound propagation velocity v 2 The method comprises the steps of carrying out a first treatment on the surface of the The third material has a third refractive index n 3 The method comprises the steps of carrying out a first treatment on the surface of the Wherein n is 1 ≤n 2 ，n 2 ＞n 3 ，1≤v 1 /v 2 Less than or equal to 1.1; in the present embodiment, the second refractive index n 2 Than the third refractive index n 3 Large 3.5×10 -2 The second refractive index n 2 Equal to the first refractive index n 1 The first sound propagation velocity v 1 And the second sound propagation velocity v 2 The ratio of (2) is 1.1, so that phonons are easy to leak, especially leak from the second inner cladding structure 220, the leakage loss can be more than 3dB/m, the coupling strength of the phonons and photons is weakened, and the threshold value of stimulated brillouin scattering is further improved;
the air cladding 300 is wrapped and arranged outside the inner cladding 200 and is formed by surrounding and arranging quartz glass tubes; a second air hole 310 is provided in the air clad 300 along the axial direction of the core 100; the second air holes 310 are uniformly distributed in the air cladding 300 in a ring shape;
the outer cladding 400 is clad on the outside of the air cladding 300 and is made of a quartz glass tube.
Illustratively, in this embodiment, the core 100 is formed from 19 glass rods 110 of a first material closely packed, and the cross-section of the core 100 approximates a hexagon.
As a variation of this embodiment, the core 100 may also employ 7 glass rods 110 of the first material closely packed into a hexagonal structure; alternatively, the core 100 may be formed by closely stacking 37 glass rods 110 of a first material; the method can be specifically set according to the use requirement; the glass rod 110 of the first material is a rare earth doped glass rod.
Specifically, in this embodiment, the first material is doped with a rare earth element; the rare earth element is ytterbium.
As a variation of this embodiment, the rare earth element may also be neodymium, bait, holmium, and/or thulium; the first material may be doped with at least one co-doping element; the co-doping element comprises aluminum, phosphorus, sulfur, germanium or fluorine.
Further, the mode field diameter of the stimulated brillouin scattering-producing single mode optical fiber is larger than 30 microns.
Specifically, in this embodiment, the maximum cross-sectional dimension of the fiber core 100 may be set to 80 μm, and by adjusting the diameter of the first air hole 211, the mode field diameter of the single mode fiber suppressing stimulated brillouin scattering may be ensured to be not less than 70 μm, and the higher-order mode may have high loss, for example, loss is not less than 10dB/m, and single-mode operation may be ensured, so that stimulated brillouin scattering may be effectively suppressed under the dual action of the large mode field diameter and the high phonon leakage loss.
Illustratively, in this embodiment, the second material is germanium-doped quartz glass; the third material is fluorine-doped quartz glass.
As a modification of this embodiment, the second material may also be germanium and fluorine co-doped quartz glass.
In the invention, germanium and fluorine elements are used for precisely regulating and controlling the second refractive index n of the second material 2 And the second sound velocity v 2 The method comprises the steps of carrying out a first treatment on the surface of the For example, doping germanium can increase the refractive index of the silica glass, doping fluorine can decrease the refractive index of the silica glass, doping germanium can increase the density of the silica glass and decrease the propagation sound velocity, and doping fluorine can decrease the density of the silica glass and increase the propagation sound velocity.
Referring to fig. 4 and 5, as a modification of the present embodiment, the channel unit 221 may also be a concentric glass rod composed of the second material and the third material; for example, the third material may be disposed outside the second material in a wrapping manner; or the second material is coated and arranged on the outer side of the third material; and the channel units 221 shown in fig. 3, 4 and 5 may be mixed, i.e., two or three of the above-mentioned channel units 221 may be simultaneously employed in one second cladding structure 220.
Referring to fig. 2, the number of the second inner cladding features 220 is 6 and is uniformly distributed on the outside of the core 100; the second inner cladding structure 220 has a linear cross section, penetrates the first inner cladding structure 210 in the radial direction of the core 100, and communicates the core 100 with the third inner cladding structure 230.
As a modification of the present embodiment, the second inner cladding structure 220 may also be provided with one, two, three, four, five, or the like; in addition, the second inner cladding structure 220 may be rotated clockwise or counterclockwise with the center of the channel unit 221 next to the core 100 as the rotation center, so as to obtain the deformed linear second inner cladding structure 220, for example, rotated 60 degrees.
Example 2
Referring to fig. 6, the present embodiment is different from embodiment 1 in that the core 100 is formed by closely stacking 7 glass rods 110 of the first material; the second material is germanium and fluorine co-doped quartz glass; the number of the second inner cladding structures 220 is three, and the second inner cladding structures are respectively arranged in a zigzag shape; the second refractive index n 2 Than the third refractive index n 3 Large 3×10 -2 The second refractive index n 2 Than the first refractive index n 1 Large 3×10 -4 The first sound propagation velocity v 1 And the second sound propagation velocity v 2 Equal, so that phonons are easy to leak, especially leak from the second inner cladding structure 220, the leakage loss can be more than 10dB/m, the coupling strength of the phonons and photons is weakened, and the threshold value of stimulated Brillouin scattering is further improved;
the maximum cross-sectional dimension of the fiber core 100 may be set to 50 μm, so that by adjusting the diameter of the first air hole 211, it is ensured that the mode field diameter of the single mode fiber suppressing stimulated brillouin scattering is not less than 40 μm, and that the higher order mode may have high loss, for example, loss is not less than 3dB/m, and single mode operation is ensured, so that stimulated brillouin scattering may be effectively suppressed under the dual effects of the large mode field diameter and high phonon leakage loss.
As a variation of this embodiment, the core 100 may also employ 19 glass rods 110 of the first material closely packed into a hexagonal structure; alternatively, the core 100 may be formed by closely stacking 37 glass rods 110 of a first material; the method can be specifically set according to the use requirement; the glass rod 110 of the first material is a rare earth doped glass rod.
As a modification of the present embodiment, the second inner cladding structure 220 may also be provided with one, two, four, five, six, or the like; in addition, the second inner cladding structure 220 may be rotated clockwise or counterclockwise with the center of the circle of one channel unit 221 next to the core 100 as the rotation center, so that another polygonal second inner cladding structure 220 may be obtained, for example, rotated 60 degrees.
Example 3
Referring to fig. 7, the difference between the present embodiment and embodiment 1 is that the number of the second inner cladding structures 220 is two, and the positions of the second inner cladding structures connected to the fiber core are different, and the second inner cladding structures are respectively arranged in a straight line shape; the second refractive index n 2 Than the third refractive index n 3 Large 2×10 -2 The second refractive index n 2 Than the first refractive index n 1 Large 1×10 -4 The first sound propagation velocity v 1 And the second sound propagation velocity v 2 The ratio of (2) is 1.01, so that phonons are easy to leak, especially leak from the second inner cladding structure 220, the leakage loss can be more than 10dB/m, the coupling strength of the phonons and photons is weakened, and the threshold value of stimulated Brillouin scattering is further improved;
the maximum cross-sectional dimension of the fiber core 100 may be set to 60 μm, so that by adjusting the diameter of the first air hole 211, it is ensured that the mode field diameter of the single mode fiber suppressing stimulated brillouin scattering is not less than 50 μm, and that the higher order mode may have a high loss, for example, a loss of not less than 6dB/m, ensuring single mode operation, so that stimulated brillouin scattering may be effectively suppressed under the dual action of the large mode field diameter and the high leakage loss of phonons.
As a variation of this embodiment, the core 100 may also employ 7 glass rods 110 of the first material closely packed into a hexagonal structure; alternatively, the core 100 may be formed by closely stacking 37 glass rods 110 of a first material; the method can be specifically set according to the use requirement; the glass rod 110 of the first material is a rare earth doped glass rod.
As a modification of the present embodiment, the second inner cladding structure 220 may also be provided with one, three, four, five, or the like; in addition, the second inner cladding structure 220 may be rotated counterclockwise with the center of the channel unit 221 next to the core 100 as the rotation center, so that another linear second inner cladding structure 220 may be obtained, for example, rotated 60 degrees or 120 degrees.
In the above embodiments 1 to 3, the arrangement of the second inner cladding layer structure 220 of different forms is shown, respectively; it can be appreciated that the same single mode fiber that suppresses stimulated brillouin scattering can be combined by adopting multiple arrangements of the second inner cladding structure 220; for example, one of the second inner cladding features 220 in embodiment 2 may be replaced with one of the second inner cladding features 220 in embodiment 1.
The above is not relevant and is applicable to the prior art.
In this document, terms such as front, rear, upper, lower, etc. are defined with respect to the positions of the components in the drawings and with respect to each other, for clarity and convenience in expressing the technical solution. It should be understood that the use of such orientation terms should not limit the scope of the protection sought herein.
The embodiments described above and features of the embodiments herein may be combined with each other without conflict.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (10)
1. A single mode optical fiber that suppresses stimulated brillouin scattering, comprising:
a fiber core formed by stacking glass rods of a first material; the first material has a first refractive index n 1 And a first sound propagation velocity v 1 ；
The inner cladding comprises a first inner cladding structure, a second inner cladding structure and a third inner cladding structure; the first inner cladding structure is arranged on the outer side of the fiber core in a cladding mode and is formed by stacking glass tubes of a second material; a first air hole is formed in the first inner cladding structure, and the first air hole is formed along the axial direction of the fiber core; the third inner cladding structure is arranged outside the first inner cladding structure in a cladding way and is made of the second material; the second inner cladding structure is arranged between the fiber core and the third inner cladding structure and penetrates through the first inner cladding structure; the second inner cladding structure is formed by continuously arranging channel units; the channel unit is a glass rod of the second material or a concentric glass rod formed by the second material and a third material; the second material has a second refractive index n 2 And a second sound propagation velocity v 2 The method comprises the steps of carrying out a first treatment on the surface of the The third material has a third refractive index n 3 The method comprises the steps of carrying out a first treatment on the surface of the Wherein n is 1 ≤n 2 ，n 2 ＞n 3 ，1≤v 1 /v 2 ≤1.1。
2. The stimulated brillouin scattering-suppressing single-mode optical fiber of claim 1, further comprising an air cladding layer; the air cladding is arranged on the outer side of the inner cladding in a cladding mode and is formed by surrounding and arranging quartz glass tubes; a second air hole is formed in the air cladding along the axial direction of the fiber core; the second air holes are distributed in the air layer in a ring shape.
3. The stimulated brillouin scattering-suppressing single-mode optical fiber of claim 2, further comprising an outer cladding layer; the outer cladding layer is arranged outside the air cladding layer in a cladding mode and is made of a quartz glass tube.
4. The stimulated brillouin scattering-inhibiting single mode optical fiber of claim 1, wherein the single mode optical fiber has a mode field diameter greater than 30 microns.
5. The stimulated brillouin scattering-suppressing single mode optical fiber of claim 1, wherein said first material is doped with at least one rare earth element; the rare earth element comprises ytterbium, neodymium, bait, holmium or thulium.
6. The stimulated brillouin scattering-suppressing single mode optical fiber of claim 5, wherein said first material is further doped with at least one co-doping element; the co-doping element comprises aluminum, phosphorus, sulfur, germanium or fluorine.
7. The stimulated brillouin scattering-suppressing single-mode optical fiber of claim 1, wherein the second material is germanium-doped quartz glass; or the second material is germanium and fluorine co-doped quartz glass.
8. The stimulated brillouin scattering-suppressing single-mode optical fiber of claim 1, wherein when the channel unit is a concentric glass rod composed of the second material and the third material, the third material cladding is disposed outside the second material or the second material cladding is disposed outside the third material.
9. The stimulated brillouin scattering-suppressing single-mode optical fiber of claim 1, wherein the third material is fluorine-doped quartz glass.
10. The stimulated brillouin scattering-suppressing single-mode optical fiber of claim 1, wherein the cross section of the second inner cladding structure is rectilinear or polyline-shaped.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210075825.4A CN114488387B (en) | 2022-01-23 | 2022-01-23 | Single mode fiber capable of inhibiting stimulated Brillouin scattering |
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| CN202210075825.4A CN114488387B (en) | 2022-01-23 | 2022-01-23 | Single mode fiber capable of inhibiting stimulated Brillouin scattering |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1696251A2 (en) * | 2001-08-30 | 2006-08-30 | Crystal Fibre A/S | Opticial fibre with high numerical aperture, method of its production and use thereof |
| US7283714B1 (en) * | 2006-12-15 | 2007-10-16 | Ipg Photonics Corporation | Large mode area fiber for low-loss transmission and amplification of single mode lasers |
| WO2010085605A1 (en) * | 2009-01-23 | 2010-07-29 | Nufern | Optical fiber with suppressed stimulated brillouin scattering |
| US7822314B1 (en) * | 2008-07-02 | 2010-10-26 | The United States Of America As Represented By The Secretary Of The Air Force | Segmented acoustic core photonic crystal fiber laser |
| CN103080796A (en) * | 2010-06-25 | 2013-05-01 | Nkt光子学有限公司 | Large core area single mode optical fiber |
| CN103246014A (en) * | 2007-09-26 | 2013-08-14 | Imra美国公司 | Glass large-core optical fibers |
| CN110194587A (en) * | 2019-05-30 | 2019-09-03 | 长飞光纤光缆股份有限公司 | A kind of photonic crystal fiber, its prefabricated rods, preparation method and application |
| CN112147738A (en) * | 2020-10-19 | 2020-12-29 | 华中科技大学 | high-Raman-gain optical fiber capable of inhibiting stimulated Brillouin scattering effect and preparation method thereof |
| CN113126198A (en) * | 2019-12-31 | 2021-07-16 | 武汉安扬激光技术有限责任公司 | Single-mode optical fiber with large fiber core diameter |
| CN113917596A (en) * | 2021-10-12 | 2022-01-11 | 燕山大学 | Microstructure optical fiber for dispersion compensation |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110038587A1 (en) * | 2009-08-11 | 2011-02-17 | Leslie Brandon Shaw | Multi-clad optical fiber |
| US8452145B2 (en) * | 2010-02-24 | 2013-05-28 | Corning Incorporated | Triple-clad optical fibers and devices with triple-clad optical fibers |
-
2022
- 2022-01-23 CN CN202210075825.4A patent/CN114488387B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1696251A2 (en) * | 2001-08-30 | 2006-08-30 | Crystal Fibre A/S | Opticial fibre with high numerical aperture, method of its production and use thereof |
| US7283714B1 (en) * | 2006-12-15 | 2007-10-16 | Ipg Photonics Corporation | Large mode area fiber for low-loss transmission and amplification of single mode lasers |
| CN103246014A (en) * | 2007-09-26 | 2013-08-14 | Imra美国公司 | Glass large-core optical fibers |
| US7822314B1 (en) * | 2008-07-02 | 2010-10-26 | The United States Of America As Represented By The Secretary Of The Air Force | Segmented acoustic core photonic crystal fiber laser |
| WO2010085605A1 (en) * | 2009-01-23 | 2010-07-29 | Nufern | Optical fiber with suppressed stimulated brillouin scattering |
| CN103080796A (en) * | 2010-06-25 | 2013-05-01 | Nkt光子学有限公司 | Large core area single mode optical fiber |
| CN110194587A (en) * | 2019-05-30 | 2019-09-03 | 长飞光纤光缆股份有限公司 | A kind of photonic crystal fiber, its prefabricated rods, preparation method and application |
| CN113126198A (en) * | 2019-12-31 | 2021-07-16 | 武汉安扬激光技术有限责任公司 | Single-mode optical fiber with large fiber core diameter |
| CN112147738A (en) * | 2020-10-19 | 2020-12-29 | 华中科技大学 | high-Raman-gain optical fiber capable of inhibiting stimulated Brillouin scattering effect and preparation method thereof |
| CN113917596A (en) * | 2021-10-12 | 2022-01-11 | 燕山大学 | Microstructure optical fiber for dispersion compensation |
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