CN114236674A - Ultrahigh-strength thin-diameter bending-resistant optical fiber - Google Patents
Ultrahigh-strength thin-diameter bending-resistant optical fiber Download PDFInfo
- Publication number
- CN114236674A CN114236674A CN202111613977.7A CN202111613977A CN114236674A CN 114236674 A CN114236674 A CN 114236674A CN 202111613977 A CN202111613977 A CN 202111613977A CN 114236674 A CN114236674 A CN 114236674A
- Authority
- CN
- China
- Prior art keywords
- layer
- optical fiber
- coating
- stress buffer
- resistant optical
- 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.)
- Pending
Links
Images
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
-
- 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
- G02B6/02395—Glass optical fibre with a protective coating, e.g. two layer polymer coating deposited directly on a silica cladding surface during fibre manufacture
-
- 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
- G02B6/0365—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 arranged - - +
-
- 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
- G02B6/03694—Multiple layers differing in properties other than the refractive index, e.g. attenuation, diffusion, stress properties
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
The invention discloses an ultrahigh-strength thin-diameter bending-resistant optical fiber which sequentially comprises a core layer, an inner cladding layer, a depressed layer, an outer cladding layer, an inner coating stress buffer layer and an outer coating mechanical enhancement layer from inside to outside, wherein the core layer is doped with germanium, and the relative refractive index difference delta 1 is 0.26-0.85%; inner cladding doped CF4The relative refractive index difference delta 2 of the inner cladding is-0.01% -0.1%, the depressed layer is doped with fluorine, the relative refractive index difference delta 3 of the depressed layer is-0.5% -0.3%, the outer cladding layer is made of pure silicon dioxide materials, the inner coating stress buffer layer and the outer coating mechanical enhancement layer are made of polyimide materials respectively, and the Young modulus of the inner coating stress buffer layer is smaller than that of the outer coating mechanical enhancement layer. According to the invention, the optical fiber structure, the coating material and the process are redesigned, and the outer coating layer adopts a two-layer coating structure, so that the optical fiber has higher mechanical strength and more excellent bending resistance effect under smaller size, and is suitable for signal transmission, sensing and the like under extreme environment.
Description
Technical Field
The invention belongs to the technical field of optical fibers, and particularly relates to an ultrahigh-strength thin-diameter bending-resistant optical fiber.
Background
The main structure of present common single mode fiber is quartz sandwich layer and encircles the quartz surrounding layer outside the quartz sandwich layer, in order to improve the intensity of optic fibre, optimize the transmission performance and the anti bending ability of optic fibre, the coating parcel is carried out again in quartz surrounding layer outside usually, the coating is according to the optic fibre application field of difference, generally divide into two-layer coating structure, including structural acrylic resin class coating material that uses the modulus ratio lower of structural use of coating, give the better anti bending ability of optic fibre, and structural acrylic resin material that uses the modulus ratio higher of structural use of coating, give the better intensity of optic fibre, the reinforcing coating is to the protective capacities of optic fibre. With the gradual expansion of the application field of optical fiber, in some special occasions, more rigorous requirements are put on the strength of the optical fiber, for example, in the fields of deep sea detection, aerial detection and the like, in order to solve the problem of the strength of the optical fiber under dynamic and extreme use environments, some current mainstream methods are as follows:
1. the sectional structure of the optical rod, particularly the uniformity of the core layer structure, is optimized, the surface defects of the optical rod are reduced through processes such as acid washing and the like in the subsequent process of the optical rod, and the strength of the bare optical fiber is improved;
2. the strength of the bare fiber is improved, and the tensile resistance and bending resistance of the fiber are improved by reducing the structural defects on the surface of the bare fiber;
3. the structure of the coating is adjusted, the modulus is more matched in the selection of the materials of the inner coating and the outer coating, and the outer coating uses the coating with higher modulus.
Through the measures, the strength of the optical fiber can be improved to a proper degree, but the strength of the optical fiber cannot be improved to a greater extent, in some dynamic use environments, in order to solve the problem, a braid is usually added outside the optical fiber to bear greater stress, but the method greatly increases the outer diameter of the whole optical fiber, limits the wire capacity in a unit space, and greatly restricts the large-scale application of the high-strength optical fiber in more occasions.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention aims to provide an ultrahigh-strength thin-diameter bending-resistant optical fiber.
In order to achieve the purpose and achieve the technical effect, the invention adopts the technical scheme that:
an ultra-high strength thin diameter bend resistant optical fiber from inside to outsideThe optical fiber comprises a core layer, an inner cladding layer, a sunken layer, an outer cladding layer, an inner coating stress buffer layer and an outer coating mechanical enhancement layer, wherein the core layer is doped with germanium, and the relative refractive index difference delta 1 is 0.26-0.85%; inner cladding doped CF4The relative refractive index difference delta 2 of the inner cladding is-0.01% -0.1%, the depressed layer is doped with fluorine, the relative refractive index difference delta 3 of the depressed layer is-0.5% -0.3%, the outer cladding is made of pure silicon dioxide materials, the inner coating stress buffer layer and the outer coating mechanical enhancement layer are respectively made of polyimide materials, and the Young modulus of the inner coating stress buffer layer is smaller than that of the outer coating mechanical enhancement layer.
The radius R1 of the core layer, the radius R2 of the inner cladding, the radius R3 of the depressed layer and the radius R4 of the outer cladding satisfy the following conditional expression:
R1＝3.0～4.0μm
R2/R1＝2.0～3.0
R3/R1＝3.5～4.5
R4/R1＝4.5～5.5。
the average Young modulus of the internal coating stress buffer layer is 0.6-1Mpa, and the internal coating stress buffer layer and the external coating layer keep excellent interface adhesive force.
The thickness of the internal coating stress buffer layer is 130-165 mu m.
The thermal curing temperature of the internal coating stress buffer layer is 200-300 ℃, the thermal curing time is 10-14s, and the curing degree is more than 95%.
The outer coating mechanical enhancement layer is made of modified polyamide-imide resin material with the elongation rate of more than 150% and the Young modulus of more than 95 MPa.
The thickness of the outer coating mechanical enhancement layer is 180-300 mu m.
The thermal curing temperature of the outer coating mechanical enhancement layer is 350-600 ℃, the thermal curing time is 16-24s, and the curing degree is more than 95%.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses an ultrahigh-strength thin-diameter bending-resistant optical fiber, which is characterized in that the section structure, coating materials and process of a prefabricated rod are redesigned, a two-layer coating structure is adopted, a polyimide polyester composite material with low Young modulus is used as an inner coating, good interface bonding force between the prefabricated rod and an outer coating is ensured, the flexibility of the optical fiber is enhanced, a modified polyimide material with high Young modulus is used as an outer coating, the strength of the optical fiber is higher, the influence of the coating material on the attenuation of the optical fiber intrinsic evidence is reduced as much as possible by the two-layer coating structure, the performance of the optical fiber is more excellent than that of the optical fiber coated by traditional acrylic resin and coated by a single layer of polyimide, the purpose that the optical fiber has ultrahigh strength can be achieved, the requirement on a use environment with more rigorous strength requirement can be met, and compared with the existing optical fiber products, the ultrahigh-strength thin-diameter bending-resistant optical fiber has higher mechanical strength and more excellent bending resistance effect under a smaller size, the sensor is suitable for signal transmission, sensing and the like in extreme environments.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of the relative refractive index of the present invention;
FIG. 3 is a diagram of the coating process for internally coating a stress buffer layer and externally coating a mechanical enhancement layer in accordance with the present invention.
Detailed Description
The present invention is described in detail below with reference to the attached drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby clearly defining the protection scope of the present invention.
The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.
As shown in FIGS. 1 to 3, an ultra-high strength thin diameter bending resistant optical fiber has high strength and bending resistance, can withstand a tensile force up to 15000MPa, has a thin optical fiber diameter, has an attenuation of less than 0.25dB/km at a 1550nm operating band, has a single turn bending additional loss of less than 0.001dB at a bending radius of 5mm,the additional loss of 10 turns is less than 0.008 dB. More specifically, the ultrahigh-strength thin-diameter bending-resistant optical fiber sequentially comprises a core layer 1, an inner cladding layer 2, a depressed layer 3, an outer cladding layer 4, an inner coating stress buffer layer 5 and an outer coating mechanical enhancement layer 6 from inside to outside, wherein the core layer 1 is doped with germanium, the radius R1 of the core layer 1 is 3-4 mu m, and the relative refractive index difference delta 1 is 0.26% -0.85%; inner cladding 2 doped CF4The relative refractive index difference delta 2 of the inner cladding 2 is-0.01% -0.1%; the depressed layer 3 is doped with fluorine, and the relative refractive index difference delta 3 of the depressed layer 3 is-0.5% -0.3%; the outer cladding layer 4 is made of pure silicon dioxide material; the internal coating stress buffer layer 5 and the external coating mechanical enhancement layer 6 are respectively made of polyimide materials.
The radius R1 of the core layer 1, the radius R2 of the inner cladding layer 2, the radius R3 of the depressed layer 3 and the radius R4 of the outer cladding layer 4 satisfy the following conditional expression:
R1＝3.0～4.0μm
R2/R1＝2.0～3.0
R3/R1＝3.5～4.5
R4/R1＝4.5～5.5。
according to the invention, a polyimide material is introduced for coating, but when polyimide is directly coated on the surface of an optical fiber, the additional attenuation of the optical fiber is greatly increased due to the problems of viscosity matching with the surface of a bare optical fiber and the like, and the bending resistance of the optical fiber is not facilitated, so that the optical fiber is provided with an internal coating stress buffer layer 5 and an external coating mechanical enhancement layer 6 from inside to outside in sequence, the internal coating stress buffer layer 5 mainly adopts the polyimide material with better bonding force with the bare optical fiber, the modulus of the material is lower, the typical Young modulus is 0.85MPa, the average Young modulus is 0.6-1MPa, the excellent interface bonding force is kept with an outer coating layer 4, the main function is to increase the flexibility of the optical fiber and improve the bending resistance of the optical fiber, and the thickness of the internal coating stress buffer layer 5 is 130-165 micrometers; the outer coating mechanical enhancement layer 6 is made of a modified polyamide-imide resin material with the elongation rate of more than 150% and the Young modulus of more than 95MPa, and the thickness of the outer coating mechanical enhancement layer 6 is 180-300 mu m. The curing of the two-layer coating structure during wiredrawing coating is carried out according to the mode of twice curing of internal and external coatings:
the prefabricated rod 7 coated with the outer cladding layer 4 is sent into a wire drawing furnace 8, the surface of the prefabricated rod 7 is coated with a polyimide material with excellent binding force with the polyimide material, gradient thermosetting is adopted after coating, the thermosetting temperature gradient distribution is 200-300 ℃, the thermosetting time is 10-14s, an inner coating stress buffer layer 5 is obtained, then a modified polyamide-imide resin material is coated, thermosetting is carried out after coating, the thermosetting temperature is 350-600 ℃, the thermosetting time is 16-24s, an outer coating mechanical enhancement layer 6 is obtained, the curing degree of the inner coating stress buffer layer 5 and the outer coating mechanical enhancement layer 6 is ensured to be more than 95%, the tensile strength of the optical fiber is greatly enhanced, the two-layer coating structure of the inner coating stress buffer layer 5 and the outer coating mechanical enhancement layer 6 reduces the influence of the coating material on the intrinsic attenuation of the optical fiber as much as possible, and the performance of the optical fiber is more excellent than that of the traditional acrylic resin coating and single-layer coating of polyimide, can be directly applied to a specific use environment without cabling.
The parts or structures which are not described in detail can be obtained by adopting the prior art or the existing products, and can be directly purchased in the market, and the details are not described herein.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. The ultrahigh-strength thin-diameter bending-resistant optical fiber is characterized by sequentially comprising a core layer, an inner cladding layer, a depressed layer, an outer cladding layer, an inner coating stress buffer layer and an outer coating mechanical enhancement layer from inside to outside, wherein the core layer is doped with germanium, and the relative refractive index difference delta 1 is 0.26-0.85%; inner cladding doped CF4The relative refractive index difference delta 2 of the inner cladding is-0.01% -0.1%, the depressed layer is doped with fluorine, the relative refractive index difference delta 3 of the depressed layer is-0.5% -0.3%, the outer cladding is made of pure silicon dioxide materials, the inner coating stress buffer layer and the outer coating mechanical enhancement layer are respectively made of polyimide materials, and the Young modulus of the inner coating stress buffer layer is smaller than that of the outer coating mechanical enhancement layer.
2. The ultra-high strength fine diameter bend-resistant optical fiber of claim 1, wherein the radius of the core layer R1, the radius of the inner cladding R2, the radius of the depressed layer R3, and the radius of the outer cladding R4 satisfy the following conditional expressions:
R1＝3.0～4.0μm
R2/R1＝2.0～3.0
R3/R1＝3.5～4.5
R4/R1＝4.5～5.5。
3. the ultra-high strength thin diameter bend resistant optical fiber of claim 1, wherein said inner stress buffer layer has an average young's modulus of 0.6-1Mpa and maintains excellent interfacial adhesion with the outer cladding layer.
4. An ultra-high strength, thin diameter, bend resistant optical fiber as recited in claim 1, wherein said inner stress buffer layer has a thickness of 130-165 μm.
5. The ultra-high strength fine diameter bend-resistant optical fiber as claimed in claim 1, wherein the thermal curing temperature of said internal stress buffer layer is 200 ℃ and 300 ℃, the thermal curing time is 10-14s, and the curing degree is above 95%.
6. An ultra-high strength fine diameter bend-resistant optical fiber as recited in claim 1, wherein said outer coated mechanical reinforcement layer is formed of a modified polyamideimide resin material having an elongation of greater than 150% and a Young's modulus of greater than 95 MPa.
7. An ultra-high strength, fine diameter, bend resistant optical fiber as recited in claim 1, wherein said outer coated mechanical reinforcement layer has a thickness of 180 to 300 μm.
8. The ultra-high strength fine diameter bend-resistant optical fiber as claimed in claim 1, wherein the thermal curing temperature of said outer coated mechanical reinforcement layer is 350-.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111613977.7A CN114236674A (en) | 2021-12-27 | 2021-12-27 | Ultrahigh-strength thin-diameter bending-resistant optical fiber |
| PCT/CN2022/129735 WO2023124526A1 (en) | 2021-12-27 | 2022-11-04 | Ultra-high-strength, fine-diameter, anti-bending optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111613977.7A CN114236674A (en) | 2021-12-27 | 2021-12-27 | Ultrahigh-strength thin-diameter bending-resistant optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114236674A true CN114236674A (en) | 2022-03-25 |
Family
ID=80763410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111613977.7A Pending CN114236674A (en) | 2021-12-27 | 2021-12-27 | Ultrahigh-strength thin-diameter bending-resistant optical fiber |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114236674A (en) |
| WO (1) | WO2023124526A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115453681A (en) * | 2022-09-27 | 2022-12-09 | 中海石油(中国)有限公司 | Carbon-coated weak optical fiber grating array and preparation method thereof |
| CN115951445A (en) * | 2023-03-15 | 2023-04-11 | 中天科技光纤有限公司 | Bending-resistant high-voltage-resistance optical fiber and preparation method thereof |
| WO2023124526A1 (en) * | 2021-12-27 | 2023-07-06 | 江苏亨通光纤科技有限公司 | Ultra-high-strength, fine-diameter, anti-bending optical fiber |
| CN116589174A (en) * | 2023-05-09 | 2023-08-15 | 中天科技光纤有限公司 | Quartz prefabricated part, optical fiber and optical fiber preparation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102498074A (en) * | 2009-08-12 | 2012-06-13 | 康宁股份有限公司 | Optical fiber containing multi-layered coating system |
| CN103777269A (en) * | 2014-01-15 | 2014-05-07 | 烽火通信科技股份有限公司 | High-temperature-resistance optical fiber |
| CN110312689A (en) * | 2017-01-27 | 2019-10-08 | 康宁股份有限公司 | The LED of high-modulus fibre coating solidifies |
| CN111323872A (en) * | 2020-02-18 | 2020-06-23 | 中天科技精密材料有限公司 | Small-diameter optical fiber and preparation method thereof |
| CN112684538A (en) * | 2020-12-30 | 2021-04-20 | 长飞光纤光缆股份有限公司 | Square core optical fiber |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9874686B2 (en) * | 2015-05-29 | 2018-01-23 | Corning Incorporated | Optical fiber with macrobend loss mitigating layer |
| CN114236674A (en) * | 2021-12-27 | 2022-03-25 | 江苏亨通光纤科技有限公司 | Ultrahigh-strength thin-diameter bending-resistant optical fiber |
-
2021
- 2021-12-27 CN CN202111613977.7A patent/CN114236674A/en active Pending
-
2022
- 2022-11-04 WO PCT/CN2022/129735 patent/WO2023124526A1/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102498074A (en) * | 2009-08-12 | 2012-06-13 | 康宁股份有限公司 | Optical fiber containing multi-layered coating system |
| CN103777269A (en) * | 2014-01-15 | 2014-05-07 | 烽火通信科技股份有限公司 | High-temperature-resistance optical fiber |
| CN110312689A (en) * | 2017-01-27 | 2019-10-08 | 康宁股份有限公司 | The LED of high-modulus fibre coating solidifies |
| CN111323872A (en) * | 2020-02-18 | 2020-06-23 | 中天科技精密材料有限公司 | Small-diameter optical fiber and preparation method thereof |
| CN112684538A (en) * | 2020-12-30 | 2021-04-20 | 长飞光纤光缆股份有限公司 | Square core optical fiber |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023124526A1 (en) * | 2021-12-27 | 2023-07-06 | 江苏亨通光纤科技有限公司 | Ultra-high-strength, fine-diameter, anti-bending optical fiber |
| CN115453681A (en) * | 2022-09-27 | 2022-12-09 | 中海石油(中国)有限公司 | Carbon-coated weak optical fiber grating array and preparation method thereof |
| CN115951445A (en) * | 2023-03-15 | 2023-04-11 | 中天科技光纤有限公司 | Bending-resistant high-voltage-resistance optical fiber and preparation method thereof |
| CN115951445B (en) * | 2023-03-15 | 2023-05-16 | 中天科技光纤有限公司 | Bending-resistant high-voltage-resistant optical fiber and preparation method thereof |
| CN116589174A (en) * | 2023-05-09 | 2023-08-15 | 中天科技光纤有限公司 | Quartz prefabricated part, optical fiber and optical fiber preparation method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023124526A1 (en) | 2023-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114236674A (en) | Ultrahigh-strength thin-diameter bending-resistant optical fiber | |
| US4953945A (en) | Transmission protective coated optical fiber tape | |
| US4629286A (en) | Coated optical fiber cable structure which prevents longitudinal cracks | |
| CN101346654B (en) | Optical fiber core and method of evaluation thereof | |
| CN106405758B (en) | Outdoor irradiation-resistant optical cable and manufacturing method thereof | |
| CN111323872A (en) | Small-diameter optical fiber and preparation method thereof | |
| JP5550570B2 (en) | Strengthened glass fiber | |
| CN104730660B (en) | Multicore Flouride-resistani acid phesphatase optical cable and its manufacture craft | |
| EP3674763A1 (en) | Integrated optical cable and manufacturing process therefor | |
| CN207937659U (en) | High temperature resistant optical cable | |
| JPWO2021157334A5 (en) | ||
| US7200306B2 (en) | Optical fiber cable with a central reinforcing element mechanically coupled directly to the optical fibers | |
| US8141393B2 (en) | Glass fibers having improved durability | |
| US10955612B2 (en) | Stress-managed specialty fiber for sensory application | |
| CN205809369U (en) | The one optical cable of resistance to irradiation out of my cabin | |
| CN103869438A (en) | High-temperature FTTH drop cable and manufacturing technology thereof | |
| JPS6014208A (en) | Coated optical fiber | |
| US20210116658A1 (en) | Optical fibre ribbon with thin matrix material layer | |
| GB2467366A (en) | Fibre-reinforced Composite Materials with Glass Coated Carbon Fibres | |
| JPS6055304A (en) | Optical fiber having high strength | |
| CN115903155A (en) | Optical cable for wide temperature range and preparation method | |
| JPS61249008A (en) | Optical fiber | |
| JPH01196009A (en) | Optical fiber | |
| CN114924346A (en) | Polarization-maintaining three-layer coated optical fiber, coating method, optical fiber ring preparation method and application | |
| CN202870338U (en) | Solid bare fiber |
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 |