CN105137534A - Single-mode optical fiber for small-scale device - Google Patents
Single-mode optical fiber for small-scale device Download PDFInfo
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- CN105137534A CN105137534A CN201510598968.3A CN201510598968A CN105137534A CN 105137534 A CN105137534 A CN 105137534A CN 201510598968 A CN201510598968 A CN 201510598968A CN 105137534 A CN105137534 A CN 105137534A
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- 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
- G02B6/03644—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 - + -
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Abstract
The invention discloses a single-mode optical fiber for a small-scale device. The single-mode optical fiber comprises a core layer and a cladding layer, the core layer is silicon dioxide (SiO2) quartz glass doped with germanium (Ge) and fluorine (F), the diameter Dcore of the core layer is 6.5 [mu]m to 7.5 [mu]m, the range of the relative refractive index delta1 of the core layer is 0.70% to 0.75%, the cladding layer comprises three layers referring to a first layer, a second layer, and a third layer in sequence from the inside to the outside, wherein the first layer is silicon dioxide quartz glass doped with fluorine, the second layer is silicon dioxide quartz glass doped with germanium, the third layer is a pure silicon dioxide quartz glass layer, and the diameter Dclad of the cladding layer is 79 [mu]m to 81 [mu]m. According to the single-mode optical fiber, the cut-off wavelength of the optical fiber is 1300 nm-1460 nm, the range of the operating wavelength is 1550 nm, the MFD is 7.0 [mu]m-7.6[mu]m, and the fiber attenuation is less than 0.26 dB/km (in 1550 nm); the optical fiber is provided with a 80 [mu]m cladding diameter and a 165 [mu]m coating diameter so that the requirement of miniaturization of the device can be met; the bending-resistant performance is good so that the macrobending loss is less than 0.02 dB/(phi10 mm 25 loops); and the bending-resistant performance is good when the optical fiber is wound to the small-dimension device so that the macrobending loss is less than 0.03 dB/(phi15 mm 400 loops).
Description
Technical field
The invention belongs to technical field of optical fiber, more specifically, relate to a kind of miniaturized device single-mode fiber.
Background technology
Single-mode fiber has that quality is light, size is little, electromagnetism interference, transfer rate are fast, information capacity is large and the advantage such as long transmission distance.Worldwide, G.652 single-mode fiber has been laid in large quantities and has been applied among optical communication network.Along with the development of special optical fiber and fiber optic applications technology thereof, the field of optical fiber beyond general communication obtains applies more and more widely.In special optical fibre device, in order to reach application target, need a kind of optical fiber can in the environment with stable transmission performance, and common G.652 single-mode fiber cannot long-term normal work under small size particular device.
The bending resistance of optical fiber is closely-related with technology such as the material structure of optical fiber, preparation technologies.Common bend insensitive fiber is generally in order to match with common single-mode fiber, and it is consistent with ordinary optic fibre to try one's best in the geometry, doping content etc. of optical fiber, thus causes Fiber Optical Parametric to match each other, to adapt to the universal performance of optical fiber.In particular application such as nautical receiving sets, optical fiber pursue small-bend radius and extremely more than the winding number of turns, and the requirement of mode field diameter etc. not to be pursued and the consistance of general single mode fiber.In order to improve the bending resistance of optical fiber, sandwich layer can adulterate the germanium (Ge) of higher concentration, in order to reduce core material and the difference of clad material in the material property such as viscosity, thermal expansivity, simultaneously also in order to regulate the optical index scope of optical fiber, the limited area of doped with fluorine is added at sandwich layer and covering, reduce the unrelieved stress in drawing process, optimized transmission performance.
When device size requires very little, in order to hold more optical fiber, need fibre diameter to be reduced and optical property is constant, therefore fiber geometric is revised by special process, the core structure of optical fiber is remained unchanged and reduces cladding diameter, and coating diameter is corresponding minimizing also, then can meet the demand of device miniaturization.
In patent CN202256757U and CN102213791B, put forward the polarization maintaining optical fibre in a series of thin footpath, but it is devoted to solve the optical property under polarization maintaining optical fibre thin footpath condition, does not make statement to bending resistance.In bend insensitive fiber, still do not have this kind thin footpath optical fiber to propose.
General, adulterant can change the relative index of refraction of quartz glass.The adulterants such as germanium (Ge), chlorine (Cl), phosphorus (P) can make adulterate after quartz glass relative index of refraction on the occasion of, we are referred to as " positive adulterant ", and the adulterant such as fluorine (F), boron (B) can make the relative index of refraction of the quartz glass after adulterating be negative value, we are referred to as " negative adulterant ".If use one " positive adulterant " and one " negative adulterant " to adulterate to quartz glass simultaneously, then the relative index of refraction of the quartz glass after doping can be on the occasion of or negative value, or be 0.
Summary of the invention
Introduce content of the present invention for convenience, define following term:
Refractive index profile: the relation in optical fiber between glass refraction and its radius.
Refractive index contrast:
The contribution amount of fluorine (F): mix the relative index of refraction (Δ F) of fluorine (F) quartz glass relative to pure silicon dioxide quartz glass, represents with this and mixes fluorine (F) amount.
Technical matters to be solved by this invention is to provide a kind of in the work of 1550nm wavelength, has the single-mode fiber of fabulous bending resistance.This optical fiber has lower fibre loss, good bending resistance.
The present invention for the adopted technical scheme that solves the problem is:
A kind of miniaturized device single-mode fiber, sandwich layer for mix germanium (Ge) and fluorine (F) silicon dioxide (SiO
2) quartz glass, the diameter Dcore of sandwich layer is 6.5 μm to 7.5 μm, and the scope of the relative index of refraction Δ 1 of sandwich layer is 0.70% to 0.75%; Covering has 3 layerings, is followed successively by first layer, the second layering from inside to outside, the 3rd layering, and wherein first layer is for mixing fluorodioxy SiClx quartz glass, and second is layered as germanium-doped silica quartz glass, and the 3rd is layered as pure silicon dioxide quartz glass layer.
In one embodiment of the present of invention, described first layer is closely around sandwich layer, the relative index of refraction Δ 31 of this layering is 0.89%≤Δ 1-Δ 31≤0.99% with the difference of the relative index of refraction Δ 1 of sandwich layer, the scope of Δ 31 is-0.18% to-0.22%, and the diameter D31 of this layering is 12 μm to 15 μm.
In one embodiment of the present of invention, the second layering is closely around first layer, and the scope of the relative index of refraction Δ 32 of this layering is 0% to 0.1%, and the diameter D32 of this layering is 15 μm to 17 μm;
In one embodiment of the present of invention, the relative index of refraction Δ 33 of described 3rd layering is 0%, and the diameter D33 of this layering is 79 μm to 81 μm.
In one embodiment of the present of invention, have one deck closely around the polymer coating of covering outside covering, the diameter of polymer coating is 160 μm to 170 μm.
In one embodiment of the present of invention, the cutoff wavelength of this single-mode fiber is 1300nm to 1460nm.
In one embodiment of the present of invention, described single-mode fiber MFD be 7.0 μm-7.6 μm when 1550nm wavelength.
In one embodiment of the present of invention, the decay of described single-mode fiber is less than 0.26dB/km when 1550nm wavelength.
In one embodiment of the present of invention, the macrobending loss of described single-mode fiber is less than 0.02dB/ (Φ 10mm25 encloses) when 1550nm wavelength.
In one embodiment of the present of invention, the macrobending loss of described single-mode fiber is less than 0.03dB/ (Φ 15mm400 encloses) when 1550nm wavelength.
Beneficial effect of the present invention is: 1. sandwich layer mixes Ge, by optimizing and revising fiber core layer material structure, can improve the numerical aperture of optical fiber, improve the restriction ability to light.Simultaneously fiber core layer mixes F, can reduce the viscosity of core material, more mate with the viscosity of clad material, can improve material structure and the stress distribution of optical fiber, is conducive to the minimizing of defect and the reduction of optical fiber attenuation after drawing optical fibers; 2., in the layering of fibre cladding, the layering containing a pure silicon dioxide silica glass material, this layering can change the material structure of optical fiber integrally, and the stress distribution after drawing optical fibers is optimized.This layering will bear the tension stress formed in drawing process, and the stress that sandwich layer bears is then compressive stress, and this stress distribution reduces the defect density in core material by being conducive to, and reduces the scattering loss of core material, is conducive to the reduction of optical fiber attenuation; 3. in the layering of fibre cladding, mix the layering of F silica quartz glass material containing one, the layering of depressed-index wherein, have positive effect for the bending resistance improving optical fiber.The design of this hierarchy, reduces the macrobend added losses of optical fiber under small-bend radius state by being conducive to.4. the second covering is the silica quartz glass mixing germanium, forms trap effect with the first covering, can improve the restriction ability to light, strengthens optical fiber to the resistivity of pressure measurement stress, improves the micro-curved ability of optical fiber.5. optical fiber has good bending resistance, and has cladding diameter and the coating diameter of miniaturization; The all corresponding minimizing of cladding diameter and coating diameter, reduces the size of device, can be wound around more optical fiber in other words in same device size situation, improves the sensitivity of device.Relative to the optical fiber of common 125 μm, under same device size, optical fiber of the present invention can improve nautical receiving set detection range 2.3 times.
Accompanying drawing explanation
Fig. 1 is the radial section schematic diagram of one embodiment of the invention.The sandwich layer of 00 corresponding optical fiber in figure, the first layer of 31 corresponding fibre claddings, the second layering of 32 corresponding fibre claddings, the second layering of 33 corresponding fibre claddings;
Fig. 2 is the schematic diagram of each layer diameter and corresponding relative index of refraction thereof in one embodiment of the invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.In addition, if below in described each embodiment of the present invention involved technical characteristic do not form conflict each other and just can mutually combine.
As shown in Figure 1, the miniaturized device single-mode fiber in the embodiment of the present invention, includes sandwich layer and covering, and sandwich layer 00 is made up of the quartz glass mixing germanium (Ge) and fluorine (F); What be centered around sandwich layer is covering.Covering has three layerings, and first layer 31 is closely around sandwich layer, and be made up of the quartz glass mixing fluorine (F), diameter D31 is 12 μm ~ 15 μm; Second layering 32 is closely around first layer 31, and diameter D32 is 15 μm ~ 17 μm; 3rd is layered as pure silicon dioxide quartz glass layer, and namely its relative index of refraction Δ 33 is 0%, and diameter D33 is 79 μm ~ 81 μm.Closely around covering is polymer coating, and this coating provides protection for fiber glass part, and the overall diameter of coating is 160 μm ~ 170 μm.In the embodiment of the present invention, the diameter of the first layer of sandwich layer, covering, first layer and the 3rd layering, and the relative index of refraction of each layering is as shown in Figure 2.
According to the technical scheme of above-mentioned single-mode fiber, design in the parameter of the scope interior focusing fibre of its defined, and the plug manufacturing process such as PCVD technique, MCVD technique, OVD technique or the VAD technique known by us to manufacture plug according to the designing requirement of optical fiber, the manufacture of whole prefabricated rods is completed by over cladding process such as sleeve pipe technique, POD technique (plasm outward spraying technique, plasmaoutsidedeposition), OVD technique or VAD techniques.PCVD technique and POD technique carry out high concentration mix fluorine (F) time, there is certain advantage.
Draw the refractive index profile of optical fiber to use PK2400 testing equipment.The major parameter of the refractive index profile of optical fiber is as shown in table 1.
Table 1: the structural parameters of optical fiber
The Specifeca tion speeification of institute's drawing optical fiber is as shown in table 2.
Table 2: the main performance of optical fiber
As can be seen from embodiment: 1. sandwich layer is mixed Ge concentration and can be had an impact to the bending resistance of optical fiber and decay, suitably improve the concentration that sandwich layer mixes Ge, the bending resistance of optical fiber can be improved.But the Ge doping of excessive concentrations, can cause the increase of sandwich layer material scattering loss, also have a certain impact to manufacturing cost and technology difficulty meanwhile; 2. mix the layering of F silica quartz glass in covering, its width will change material structure and the stress distribution of optical fiber, can have an impact to the waveguide performance of optical fiber meanwhile.The raising of F layering to the bending resistance of optical fiber of mixing of depressed-index has positive effect.The increase of its width or the degree of depth all will further improve the bending property of optical fiber, but the increase of width and the degree of depth also means the increase of cost and technology difficulty.Meeting under certain bending precondition required, need to find suitable width and the structural parameters of the degree of depth.3. the germanium-doped silica quartz glass layering of the second covering, jointly forms a trap area with the fluorodioxy SiClx quartz glass layering of mixing of the first covering, blocks leaking of optical energy, improve anti-micro-curved ability.
Test result shows, according to the optical fiber manufactured by technical scheme of the present invention, cutoff wavelength is at 1300nm-1460nm, in 1550nm operation wavelength, its MFD is 7.0 μm-7.6 μm, optical fiber attenuation is less than 0.26dB/km, and macrobending loss is less than 0.03dB/ (Φ 10mm25 encloses), and macrobending loss is less than 0.03dB/ (Φ 15mm400 encloses).
Single-mode fiber of the present invention has good bending resistance, can use in nautical receiving set.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a miniaturized device single-mode fiber, includes sandwich layer and covering, it is characterized in that, sandwich layer for mix germanium (Ge) and fluorine (F) silicon dioxide (SiO
2) quartz glass, the diameter Dcore of sandwich layer is 6.5 μm to 7.5 μm, and the scope of the relative index of refraction Δ 1 of sandwich layer is 0.70% to 0.75%; Covering has 3 layerings, is followed successively by first layer, the second layering from inside to outside, the 3rd layering, and wherein first layer is for mixing fluorodioxy SiClx quartz glass, and second is layered as germanium-doped silica quartz glass, and the 3rd is layered as pure silicon dioxide quartz glass layer.
2. single-mode fiber as claimed in claim 1, it is characterized in that, described first layer is closely around sandwich layer, the relative index of refraction Δ 31 of this layering is 0.89%≤Δ 1-Δ 31≤0.99% with the difference of the relative index of refraction Δ 1 of sandwich layer, the scope of Δ 31 is-0.18% to-0.22%, and the diameter D31 of this layering is 12 μm to 15 μm.
3. single-mode fiber as claimed in claim 1 or 2, it is characterized in that, the second layering is closely around first layer, and the scope of the relative index of refraction Δ 32 of this layering is 0% to 0.1%, and the diameter D32 of this layering is 15 μm to 17 μm.
4. single-mode fiber as claimed in claim 1 or 2, it is characterized in that, the relative index of refraction Δ 33 of described 3rd layering is 0%, and the diameter D33 of this layering is 79 μm to 81 μm.
5. single-mode fiber as claimed in claim 1 or 2, it is characterized in that outside covering, having one deck closely around the polymer coating of covering, the diameter of polymer coating is 160 μm to 170 μm.
6. single-mode fiber as claimed in claim 1 or 2, it is characterized in that, the cutoff wavelength of this single-mode fiber is 1300nm to 1460nm.
7. single-mode fiber as claimed in claim 1 or 2, is characterized in that, described single-mode fiber MFD be 7.0 μm-7.6 μm when 1550nm wavelength.
8. single-mode fiber as claimed in claim 1 or 2, it is characterized in that, the decay of described single-mode fiber is less than 0.26dB/km when 1550nm wavelength.
9. single-mode fiber as claimed in claim 1 or 2, it is characterized in that, the macrobending loss of described single-mode fiber is less than 0.02dB (Φ 10mm25 encloses) when 1550nm wavelength.
10. single-mode fiber as claimed in claim 1 or 2, it is characterized in that, the macrobending loss of described single-mode fiber is less than 0.03dB (Φ 15mm400 encloses) when 1550nm wavelength.
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| CN201510598968.3A CN105137534B (en) | 2015-09-18 | 2015-09-18 | A kind of miniaturized device single mode optical fiber |
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| CN201510598968.3A CN105137534B (en) | 2015-09-18 | 2015-09-18 | A kind of miniaturized device single mode optical fiber |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106154410A (en) * | 2016-08-30 | 2016-11-23 | 烽火通信科技股份有限公司 | A kind of single-mode fiber and manufacture method thereof |
| CN110174724A (en) * | 2019-04-08 | 2019-08-27 | 安徽长荣光纤光缆科技有限公司 | A kind of low-loss single-mode optical fiber and preparation method thereof |
| CN110873925A (en) * | 2019-10-14 | 2020-03-10 | 江苏法尔胜光通信科技有限公司 | 980 optical fiber for thin-diameter coupler |
| WO2020119244A1 (en) * | 2018-12-13 | 2020-06-18 | 中天科技精密材料有限公司 | Optical fiber and preparation method therefor |
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| CN1300608C (en) * | 2001-03-30 | 2007-02-14 | 古河电气工业株式会社 | Optical fiber, light transmission line using said optical fiber and light transmission system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106154410A (en) * | 2016-08-30 | 2016-11-23 | 烽火通信科技股份有限公司 | A kind of single-mode fiber and manufacture method thereof |
| WO2020119244A1 (en) * | 2018-12-13 | 2020-06-18 | 中天科技精密材料有限公司 | Optical fiber and preparation method therefor |
| CN110174724A (en) * | 2019-04-08 | 2019-08-27 | 安徽长荣光纤光缆科技有限公司 | A kind of low-loss single-mode optical fiber and preparation method thereof |
| CN110873925A (en) * | 2019-10-14 | 2020-03-10 | 江苏法尔胜光通信科技有限公司 | 980 optical fiber for thin-diameter coupler |
| CN110873925B (en) * | 2019-10-14 | 2021-09-07 | 江苏法尔胜光通信科技有限公司 | 980 optical fiber for thin-diameter coupler |
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