CN1309778A - Long hual single mode waveguide - Google Patents
Long hual single mode waveguide Download PDFInfo
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- CN1309778A CN1309778A CN99808646A CN99808646A CN1309778A CN 1309778 A CN1309778 A CN 1309778A CN 99808646 A CN99808646 A CN 99808646A CN 99808646 A CN99808646 A CN 99808646A CN 1309778 A CN1309778 A CN 1309778A
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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 - + -
-
- 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
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/122—Basic optical elements, e.g. light-guiding paths
- G02B6/125—Bends, branchings or intersections
-
- 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
- G02B6/02014—Effective area greater than 60 square microns in the C band, i.e. 1530-1565 nm
-
- 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
- G02B6/02214—Optical fibres with cladding with or without a coating tailored to obtain the desired dispersion, e.g. dispersion shifted, dispersion flattened
- G02B6/02219—Characterised by the wavelength dispersion properties in the silica low loss window around 1550 nm, i.e. S, C, L and U bands from 1460-1675 nm
- G02B6/02252—Negative dispersion fibres at 1550 nm
- G02B6/02257—Non-zero dispersion shifted fibres, i.e. having a small negative dispersion at 1550 nm, e.g. ITU-T G.655 dispersion between - 1.0 to - 10 ps/nm.km for avoiding nonlinear effects
-
- 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
- G02B6/02214—Optical fibres with cladding with or without a coating tailored to obtain the desired dispersion, e.g. dispersion shifted, dispersion flattened
- G02B6/02285—Characterised by the polarisation mode dispersion [PMD] properties, e.g. for minimising PMD
-
- 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
- G02B6/028—Optical fibres with cladding with or without a coating with core or cladding having graded refractive index
- G02B6/0286—Combination of graded index in the central core segment and a graded index layer external to the central core segment
-
- 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
- G02B6/03611—Highest index adjacent to central axis region, e.g. annular core, coaxial ring, centreline depression affecting waveguiding
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Optical Communication System (AREA)
- Glass Compositions (AREA)
Abstract
Disclosed is a single mode optical waveguide fiber having a segmented core. The relative indexes, the refractive index profiles and the radii of the segments are chosen to provide waveguide fiber properties advantageously used in severe environments, such as, undersea cables. The segmented core waveguide fiber has a negative total dispersion over the operating window of about 1530 nm to 1570 nm, which serves to eliminate soliton formation. The key properties of dispersion zero, cut off wavelength, attenuation, and bend resistance fall within desired ranges. The waveguide also features a low polarization mode dispersion.
Description
Background of invention
The present invention relates to a kind of single-mode fiber of inter-repeater that be apart from the Communication System Design long, that data rate is higher.Especially, single mode waveguide of the present invention combines splendid bending resistance, lower decay and bigger useful area Aeff, and these features all are that subsea use is needed.
Waveguide with large effective area will reduce nonlinear optical effect, comprising from phase modulation (PM), four-wave mixing, cross-phase modulation and nonlinear scattering process etc.All these effects all can make the Signal Degrade in the high power system.Generally, the mathematical description to these nonlinear interactions comprises ratio P/A
Eff, wherein P is a luminous power.For example, the nonlinear optics effect is followed usually and is comprised exp (P * L
Eff/ A
Eff) equation, L wherein
EffIt is effective length.Therefore, A
EffIncrease can reduce non-linear contribution to the light signal deterioration.
In the communications industry, need be under the situation of no electric signal regenerator, the quantity of information that long-distance transmissions is bigger, this has caused the revaluation to the design of single-mode fiber index distribution.The United States Patent (USP) 4,715,679 of authorizing Bhagavatula has at length disclosed a class distribution design, in this application, is referred to as the segmented core design.
The key of reappraising provides such optical waveguide, their energy
-reduce such as above-mentioned nonlinear interaction;
-there is lower decay to be optimized when working in the wavelength coverage around 1550 nanometers;
-with the image intensifer compatibility; And
-keep in the optical waveguide such as high strength, endurance and desirable characteristics such as counter-bending.
Only in the particular communications system of having stipulated bit rate, bit error rate (BER), multiplexing scheme and image intensifer (possible), definition high power and long distance are just meaningful.Have some additive factors can the meaning of high power and long distance be exerted an influence, they all are that those skilled in the art are known.But for most of purposes, high power is meant that luminous power is greater than about 10mW.Under some occasions, 1mW or littler signal power level still can be to the nonlinear interaction sensitivities, so in some lower powered systems, A
EffRemain an important consideration object.
Long distance is meant that the distance between the electric signal regenerator surpasses 100km.Regenerator will be different from the repeater that uses image intensifer.Inter-repeater in the inter-repeater distance, particularly high data density system is apart from can be less than half of regenerator spacing.
For suitable waveguide being provided for multiplexed transmission, total dispersion should be lower, but non-vanishing, and have less slope in the active length window ranges.In suppress forming the very important system of potential soliton, the total dispersion of waveguide fiber should be born, so that linear dispersion produced in the time of can not offsetting high power signals is nonlinear from phase modulation (PM).
A kind of typical case about this class waveguide fiber is a undersea system.For feasible economically, undersea system must not have to grow the information of distance delivery than speed under the situation of regenerator and on the wavelength window of expansion.The invention describes a kind of distribution of novelty, this distribution can be applicable to the situation that these are strict unusually.Below provide the desired properties of the waveguide fiber that is used for this system in detail.
Definition
Following definitions meets the common usage of this area.
The radius of each layering defines according to refractive index in the-fibre core.One particular hierarchical has first and last refractive index point.Radius from the waveguide core line to the first refractive index point present position is the inside radius of core region or fibre core layering.Similarly, from the waveguide core line to the end the refractive index radius of putting residing position be the external radius of fibre core layering.
By following description to Fig. 1 and Fig. 2 as seen, the layering radius can define easily with many kinds of modes.Can derived table 1 and table 2 by Fig. 2, in this case, with reference to the curve map of Δ % to the waveguide radius, as the radius of each layering in the index distribution of giving a definition:
The radius r of * central fibre core layering
1It is intersection point (being the point of Δ %=0) from the shaft centre line amount of waveguide to extrapolation refractive index of the centre distribution curve and x axle;
* the external radius r of the first annular layering
2Be the intersection point from an annular layer distributed curve of the shaft centre line amount to the first of waveguide and a vertical line, wherein said vertical line is that half picture from Δ % difference between the first and second annular layer distributed curves gets off;
* the external radius r of the second annular layering
3Be the intersection point from an annular layer distributed curve of the shaft centre line amount to the second of waveguide and a vertical line, wherein said vertical line is that half picture from Δ % difference between the second and the 3rd annular layer distributed curve gets off;
* the measurement of any additional annular layering external radius is similar to the external radius of the first and second annular layerings; And
* the radius of last annular layering is the mid point from waveguide core line amount to this layering.
The width of layering is the distance between layering inside radius and the external radius.Should be appreciated that the external radius of layering is corresponding to the inside radius of next layering.
The special definition of refractive index distribution curve geometric configuration is without any special meaning.Certainly, when carrying out Model Calculation, the use of definition must with done here consistent.
-useful area is:
A
Eff=2 π (∫ E
2R dr)
2/ (∫ E
4R dr), wherein integration is limited to 0 to ∞, and E is and the relevant electric field of propagating of light.Useful area is relevant with wavelength.Calculating wavelength that useful area uses and be and being positioned at is the operation window place that designs of waveguide fiber or near wavelength.For the waveguide fiber that is operated in hundreds of nanometer wavelength range, can distribute a more than A
Eff
-effective diameter D
EffCan define by following formula:
A
eff=π(D
eff/2)
2。
-relative index of refraction Δ % is defined by following equation:
Δ %=100 * (n
1 2-n
2 2)/2n
1 2, n wherein
1Be the largest refractive index of layering in the refractive index distribution curve 1, and n
2Be one with reference to refractive index, be taken as the refractive index of covering in this application.
-term refractive index distribution curve is to concern between Δ % or refractive index and the radius on selected a part of fibre core.
-term α distribution curve is the refractive index distribution curve of representing with Δ (b) %, and wherein b is a radius, and this distribution curve is followed following equation:
Δ (b) %=Δ (b
0) (1-[|b-b
0|/(b
1-b
0)]
α), b wherein
0Be that refractive index is peaked radial point, b
1Be that Δ (b) % is zero point, the scope of b is b
i≤ b≤b
f, here, b
iBe the starting point of α distribution curve, b
fBe the terminal point of α distribution curve, and α is the real number index.
Other refractive index distribution curve comprises the step change type refractive index of step change type refractive index, trapezoidal refractive index and band fillet, wherein fillet generally be since adulterant in the fast-changing zone of refractive index, spread produce.
-total dispersion is defined as the algebraic sum of waveguide dispersion and material dispersion.In ability, sometimes total dispersion is called dispersion phenomenon.The unit of total dispersion is ps/nm-km.
The bending resistance of-waveguide fiber is expressed as the introducing decay under the regulation test condition.Standard test condition comprises axle 100 weeks of waveguide fiber around 75 mm dias, and around one week of axle of 32 mm dias.Under every kind of test condition, measure the crooked decay of introducing, be unit with the dB/ unit length usually.In this application, used crooked test is with axle 5 weeks of waveguide fiber around 20 mm dias, when waveguide fiber of the present invention is applied in the stricter operating environment, needs the test of this requirements at the higher level.
Summary of the invention
The single-mode fiber fiber of the application's novelty satisfies the requirement of following high performance communication system.
A first aspect of the present invention is a kind of single-mode fiber, and it comprises the segmented core that has two layerings at least, and the segmented core outer wrapping glass-clad.On about 1530 nanometer to 1570 nanometer wavelength range, the useful area of waveguide fiber is greater than 60 microns
2, more preferably greater than 65 microns
2The decay of 1550 nanometers is less than 0.25dB/km, preferably less than 0.22dB/km.Zero-dispersion wavelength is in the scope of about 1565 nanometer to 1600 nanometers.Chromatic dispersion gradient is more more negative than about-0.5ps/nm-km in the chromatic dispersion that 1560 nanometers provide, and 1560 preferable chromatic dispersions are approximately-2ps/nm-km.Generally, the scope of slope is approximately 0.10 to 0.14ps/nm
2-km.Waveguide fiber at the total dispersion of 1530 nanometers approximately-7.2 to the scope of-3.9ps/nm-km.In 1530 nanometer to 1570 nanometer wavelength range, mode field diameter is in about 7.9 microns to 9.75 microns scope.
Can also keep good bending resistance when obtaining these performances, promptly for the situation around 5 weeks of 20 mm dia axles, the bending loss of introducing is not more than about 5dB/m.In addition, the cutoff wavelength of the optical fiber of cable form remains in the scope of about 1285 nanometer to 1500 nanometers.Additional benefit is that polarization mode dispersion is less than about 0.076ps/ (km)
1/2, be generally 0.04ps/ (km)
1/2
The refractive index distribution curve of each layering can be above-mentioned any, comprises α distribution curve, step change type refractive index distribution curve, or the trapezoidal profile curve.Unless insert special ladder during the course, refractive index distribution curve will be at refractive index discontinuity place band fillet.Fillet is caused by the dopant material diffusion that is used for changing the parent glass refractive index.Therefore, any refractive index distribution curve is can be at specified point band fillet.For example, the step change type refractive index distribution curve with positive Δ % generally has the last angle and the inferior horn of band fillet.
In one embodiment of the invention, all fibre core layerings all have positive Δ %.In another embodiment, fibre core comprises three layerings, and first is layered as the α distribution curve, and second is layered as the step change type distribution curve, and the 3rd layering has the step change type distribution curve of band fillet.Following table 1 has provided several examples of present embodiment.
In another embodiment of the present invention, core region comprises three layerings, and the diffuse dopants compensation has been done at the center, thus on the waveguide fiber center line or near refractive index do not have the remainder of relative central distribution curve to reduce.Fig. 3 illustration the compensation of this center line, wherein adulterant is a germanium.The embodiment of diffusion compensation is demonstrated polarization mode dispersion on average improve about 5 times than the waveguide fiber distribution curve of comparable not compensated.The polarization mode dispersion of novel waveguide fiber is less than 0.8ps/ (km)
1/2, be generally less than 0.04ps/ (km)
1/2
In the embodiment that comprises three layerings, begin each layering numbering from the numeral 1 of waveguide core, segmented core can be used following parametric description:
-Δ 1% is in about scope of 0.75 to 1.25;
-r
1In about 1.5 microns to 4.0 microns scope;
-Δ 2% is in about scope of 0.00 to 0.15%;
-Δ 3% is in about scope of 0.2 to 0.7
-Mean radius r
3In about 4 microns to 8 microns scope; And
The width of-Di three layerings is in about 0.5 micron to 3 microns scope.
Preferable scope is:
-Δ
1% is in about scope of 0.85 to 1.20;
-r
1In about 2.0 microns to 3.5 microns scope;
-Δ
2% is in about scope of 0.00 to 0.08%;
-Δ
3% is in about scope of 0.3 to 0.7;
-Mean radius r
3In about 5 microns to 7.5 microns scope; And
The width of-Di three layerings is in about 0.8 micron to 2.0 microns scope.
Better embodiment is:
-Δ
1% is in about scope of 0.95 to 1.15;
-r
1In about 2.5 microns to 3.0 microns scope;
-Δ
2% is in about scope of 0.00 to 0.04%;
-Δ
3% is in about scope of 0.3 to 0.7;
-Mean radius r
3In about 5 microns to 7.5 microns scope; And
The width of-Di three layerings is in about 0.8 micron to 1.5 microns scope.
In another embodiment, the total dispersion of 1560 nanometers is more more negative than about-1ps/nm-km.
In another embodiment, the center line diffusion is compensation or part compensation not, causes the recess that has a refractive index on center line, and its minimum Δ % is not more than Δ
1% about 0.20.Recess generally is inverted-cone shape, and promptly the vertex of a cone is downward, and taper the radius of wide part be not more than about 0.4 micron.
Summary of drawings
Fig. 1 a and Fig. 1 b are the curve map of Δ % to radius, and every curve map all shows with refractive index distribution curve of the present invention similarly simulates refractive index distribution curve.
Fig. 2 is the curve map of Δ % to radius, shows the definition of using among the application to radius and width.
Fig. 3 is the curve map of Δ % to radius, shows one embodiment of the present of invention.
Detailed description of the present invention
The feature of novel single-mode fiber is its segmented core design, and this design provides above-mentioned uncommon performance combination.These performances can obtain in the following manner, are each layering and select suitable refractive index distribution curve shape, and be the suitable relative index of refraction Δ of each layering selection
i% and radial width r
iAs everyone knows, the parameter of each distribution curve can interact.For example, the center radius that α is approximately 1 α distribution curve will have the radius different with the center with trapezoidal refractive index, so that the optical fiber with substantially the same performance to be provided.
Fig. 2 shows the definition of radius used herein.The radius of center layering straight line r
1Expression, this straight line are to the intersection point of extrapolation straight line 14 with transverse axis from the core centre line drawing.The external radius of layering is the straight line r from the center line drawing to a vertical line
2, wherein said vertical line is drawn down from putting 18, is the relative index of refraction Δ of layering 16 and put 18 relative index of refraction
2The relative index of refraction Δ of % and layering 20
3Half of the difference of %.The radius r of last annular layering 20
3Sign in the mid point 26 of this layering.When selecting the width w of final layering, determined geometric configuration fully.In the drawings, this width means is for point 18 and put straight line w between 22, its mid point 18 and put half of refringence between half and layering 20 and the covering 24 that 22 refractive index is respectively a refringence between layering 16 and 20.Among the figure, the radius of center line recess is expressed as straight line 30, this straight line is signed in the wideest point of inverted-cone shape recess from the center line level.
Fig. 1 a shows the distribution curve 2,4 and 6 that three kinds of computing machines generate.For clarity sake, the center layering has corresponding numbers with relevant outer ring layering.Each distribution curve all has an inverted taper recess on center line.When the overall shape of given segmented core refractive index distribution curve, just can calculate the performance of waveguide fiber with this segmented core shape.Under the situation of Fig. 1 a, distribution curve 4 provides required optic fibre characteristic.Fig. 1 b shows three kinds of additional segmented core distribution curves 8,10 and 12.In the figure, distribution curve 10 produces required optical fiber property.
Distribution curve shown in Figure 3 is the measurement result to the waveguide fiber with refractive index distribution curve of the present invention.Table 1 has provided the parameter of the fiber core refractive index distribution curve that is used for this embodiment.In the design, compensated the diffusion of center line.
Table 1
| The actual distribution curve | |
| ????Δ 1％ | ????1.15 |
| Δ % on the center line | ????0 |
| ????Δ 2％ | ????0.05 |
| ????Δ 3％ | ????0.5 |
| ????r 1μm | ????2.5 |
| ????r 2μm | ????5.5 |
| W μ m (outermost annular layering) | ????1 |
The parameter of table 1 as a large amount of waveguide fiber of target manufacturing, is on average obtained following performance number to these waveguide fibers:
-1550nm place decays to-0.204dB/km;
-mode field diameter is 9.29 μ m;
The useful area at-1550nm place is 70.9 μ m
2
-zero-dispersion wavelength is 1576nm;
The total dispersion at-1530nm place is (5.565ps/nm-km);
The total dispersion at-1560nm place is (1.892ps/nm-km);
The cutoff wavelength of-cable form is 1429.6nm; And
-polarization mode dispersion is 0.037ps/ (km)
1/2
Therefore, making the result provides a kind of everyway to be suitable for the waveguide fiber that uses in such as severe environment such as submarine communication cables.These make the effect that the result also plays the authenticating computer model.
Although disclose here and described specific embodiment of the present invention, the present invention is only limited by accompanying Claim.
Claims (10)
1. a single-mode fiber is characterized in that, comprising:
Segmented core, it has two layerings at least, and each layering all has radius r
i, refractive index distribution curve and relative index of refraction percentage Δ
i%, the wherein numbering of i hierarchical; With
Covering, its parcel and contact fibre core, covering has refractive index n
c
Wherein, r
i, Δ
i% and refractive index distribution curve provide following performance through selection:
The decay at 1550nm place is not more than and is 0.25dB/km;
Zero-dispersion wavelength is in the scope of about 1565 nanometer to 1600 nanometers;
The total dispersion of 1560 nanometers approximately-3.5ps/nm-km is to the scope of-0.5ps/nm-km;
The useful area of 1550 nanometers is greater than 60 μ m
2
The cutoff wavelength of the optical fiber of cable form is in about 1285 nanometer to 1500 nanometer range.
2. single-mode fiber as claimed in claim 1, it is characterized in that the refractive index distribution curve of any layering is selected from the group that following distribution curve is formed: the step change type refractive index distribution curve and the trapezoidal refractive index distribution curve of α distribution curve, step change type refractive index distribution curve, band fillet.
3. single-mode fiber as claimed in claim 2 is characterized in that, all Δs
i% is for just.
4. as claim 2 or 3 described single-mode fibers, it is characterized in that, fibre core has a center line and at least three layerings, first layering is from center line, have α and be approximately 1 α distribution curve, second layering and the first layering adjacency have the step change type refractive index distribution curve, and the 3rd layering and the second layering adjacency have the step change type refractive index distribution curve of being with fillet.
5. single-mode fiber as claimed in claim 1 or 2 is characterized in that, the total dispersion of 1560 nanometers is more more negative than-1ps/nm-km.
6. single-mode fiber as claimed in claim 1 or 2 is characterized in that, polarization mode dispersion is not more than about 0.08ps/ (km)
1/2
7. single-mode fiber as claimed in claim 4 is characterized in that, fibre core comprises three layerings, the wherein Δ of first layering
1% in about scope of 0.75 to 1.25, radius r
1In about 1.5 microns to 4.0 microns scope, the Δ of second layering
2% is in about scope of 0.00 to 0.15%, and the Δ of the 3rd layering
3% in about scope of 0.2 to 0.7, Mean radius r
3In about 4 microns to 8 microns scope, width is in about 0.5 micron to 3 microns scope.
8. single-mode fiber as claimed in claim 4, fibre core comprise three layerings, the wherein Δ of first layering
1% in about scope of 0.85 to 1.20, radius r
1In about 2.0 microns to 3.5 microns scope, the Δ of second layering
2% is in about scope of 0.00 to 0.08%, and the Δ of the 3rd layering
3% in about scope of 0.3 to 0.7, Mean radius r
3In about 5 microns to 7.5 microns scope, width is in about 0.8 micron to 2.0 microns scope.
9. single-mode fiber as claimed in claim 4 is characterized in that, fibre core comprises three layerings, the wherein Δ of first layering
1% in about scope of 0.95 to 1.15, radius r
1In about 2.5 microns to 3.0 microns scope, the Δ of second layering
2% is in about scope of 0.00 to 0.04%, and the Δ of the 3rd layering
3% in about scope of 0.3 to 0.7, Mean radius r
3In about 5 microns to 7.5 microns scope, width is in about 0.8 micron to 1.5 microns scope.
10. as any one described single-mode fiber in the claim 7,8 or 9, it is characterized in that also comprise the part that a relative index of refraction is recessed on center line, this recess is inverted-cone shape, compares Δ
1% is little of about 0.20 Δ %, and the base radius of inverted-cone shape is not more than about 0.4 micron.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US9499698P | 1998-07-31 | 1998-07-31 | |
| US60/094,996 | 1998-07-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1309778A true CN1309778A (en) | 2001-08-22 |
| CN1134680C CN1134680C (en) | 2004-01-14 |
Family
ID=22248424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB998086460A Expired - Fee Related CN1134680C (en) | 1998-07-31 | 1999-07-22 | Long hual single mode waveguide |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JP2003522337A (en) |
| KR (1) | KR100667408B1 (en) |
| CN (1) | CN1134680C (en) |
| AU (1) | AU5223299A (en) |
| BR (1) | BR9912650A (en) |
| CA (1) | CA2339010A1 (en) |
| ID (1) | ID28769A (en) |
| WO (1) | WO2000007048A1 (en) |
| ZA (1) | ZA994882B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114153021A (en) * | 2021-08-25 | 2022-03-08 | 山东富通光导科技有限公司 | Low dispersion slope large effective area non-zero dispersion displacement optical fiber |
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| US6789960B2 (en) | 2001-07-06 | 2004-09-14 | Corning Incorporated | Method of connecting optical fibers, an optical fiber therefor, and an optical fiber span therefrom |
| KR100485889B1 (en) * | 2002-10-30 | 2005-04-29 | 엘에스전선 주식회사 | Optical fiber for WDM transmission system |
| US6952519B2 (en) * | 2003-05-02 | 2005-10-04 | Corning Incorporated | Large effective area high SBS threshold optical fiber |
| KR100651506B1 (en) * | 2004-05-13 | 2006-11-29 | 삼성전자주식회사 | Optical fiber for long-distance optical network |
| KR100735239B1 (en) * | 2004-05-28 | 2007-07-03 | 삼성전자주식회사 | Optical fiber for metro network |
| KR100826053B1 (en) * | 2006-10-18 | 2008-04-28 | 엘에스전선 주식회사 | Optical fiber for WDM transmission system, Optical transmission line and Optical transmission system using the same |
| WO2023228743A1 (en) * | 2022-05-26 | 2023-11-30 | 住友電気工業株式会社 | Optical fiber |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5835655A (en) * | 1995-01-26 | 1998-11-10 | Corning Incorporated | Large effective area waveguide fiber |
| US5894537A (en) * | 1996-01-11 | 1999-04-13 | Corning Incorporated | Dispersion managed optical waveguide |
| US5748824A (en) * | 1995-11-17 | 1998-05-05 | Corning Incorporated | Positive dispersion optical waveguide |
-
1999
- 1999-07-22 ID IDW20010456A patent/ID28769A/en unknown
- 1999-07-22 CN CNB998086460A patent/CN1134680C/en not_active Expired - Fee Related
- 1999-07-22 BR BR9912650-8A patent/BR9912650A/en not_active IP Right Cessation
- 1999-07-22 CA CA002339010A patent/CA2339010A1/en not_active Abandoned
- 1999-07-22 WO PCT/US1999/016615 patent/WO2000007048A1/en active IP Right Grant
- 1999-07-22 AU AU52232/99A patent/AU5223299A/en not_active Abandoned
- 1999-07-22 KR KR1020017001299A patent/KR100667408B1/en not_active IP Right Cessation
- 1999-07-22 JP JP2000562782A patent/JP2003522337A/en active Pending
- 1999-07-29 ZA ZA9904882A patent/ZA994882B/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114153021A (en) * | 2021-08-25 | 2022-03-08 | 山东富通光导科技有限公司 | Low dispersion slope large effective area non-zero dispersion displacement optical fiber |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003522337A (en) | 2003-07-22 |
| KR100667408B1 (en) | 2007-01-10 |
| CN1134680C (en) | 2004-01-14 |
| ZA994882B (en) | 2000-03-31 |
| ID28769A (en) | 2001-06-28 |
| AU5223299A (en) | 2000-02-21 |
| CA2339010A1 (en) | 2000-02-10 |
| KR20010072124A (en) | 2001-07-31 |
| BR9912650A (en) | 2001-05-02 |
| WO2000007048A1 (en) | 2000-02-10 |
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| C14 | Grant of patent or utility model | ||
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