• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    OPTICAL FIBER WITH LOW CURVATURE LOSS. It is an optical fiber with low loss due to macro and microcurvature. The fiber has a first internal coating region, with an external radius r2> 8 (Micro) m and refractive index (Delta) 2, and a second external coating region that surrounds the internal coating region, with a refractive index. (Delta) 3, where (Delta) l> (Delta) 3> (Delta) 2. The difference between (Delta) 3 and (Delta) 2 is greater than 0.01. The fiber has a cable cut 22 m less than or equal to 1,260 nm and rl / r2 greater than or equal to 0.25.
    公开号:BR112012020042B1
    申请号:R112012020042-9
    申请日:2011-02-22
    公开日:2020-11-17
    发明作者:Dana C. Bookbinder；Ming-Jun Li；Pushkar Tandon
    申请人:Corning Incorporated；
    IPC主号:
    专利说明:

    Cross-referencing related orders
    [001] The present application claims the priority benefit, in accordance with title 35, paragraph 119 (e) of the United States Code 35, of the United States provisional application of serial number 61 / 308,625, filed on 26 February 2010. Field
    [002] The present invention relates to optical fibers with low curvature losses. Technical foundation
    [003] There is a need for optical fibers with low loss due to curvature, especially for optical fibers used in so-called “access” optical networks and “fiber to x” (FTTx) premise networks. Optical fibers can be used in these networks in a way that induces losses due to curvature in the optical signals transmitted by them. Some applications that may impose physical requirements that induce loss of curvature, such as tight radii of curvature, compression of the optical fiber, etc., include the use of optical fibers in optical drop cable units, distribution cables with Termination Systems Installed in Factory (FITS) and clearance loops, multiports with small radius of curvature located in cabins connecting feeders and distribution cables, and bridges at Network Access Points between descent and distribution cables. In some fiber optic designs, it is difficult to achieve, at the same time, low loss due to curvature and the short cutting wavelength of the cable. summary
    [004] In this document, optical waveguide fibers are revealed that comprise a central core region doped with germanium with external radius η and refractive index Δi and a coating region comprising a first internal coating region with external radius r2> 8 pm and refractive index Δ2 and a second outer sheath region with shrinkage index Δ3, where Δ-,> Δ3> Δ2, the difference between Δ3 and Δ2 is greater than 0.01, said fiber has a cut of 22 m cable less than or equal to 1,260 nm and the ratio η / r2 is greater than or equal to 0.25, more preferably greater than 0.3.
    [005] This document also discloses single-mode optical fibers comprising a central core region with external radius η and shrinkage index Δ1 and a coating region comprising fluorine doped silica, said coating region comprising a first coating region internal with external radius r2 and retraction index Δ2 and a second region of external coating with retraction index Δ3, where η / r2 is greater than or equal to 0.25. The fibers disclosed in this document may be compliant with both ITU G.657A and G.657B standards.
    [006] Preferably, the loss of curvature of 20 mm in diameter at 1,550 nm does not exceed 0.75 dB / revolution. Preferably, the curvature loss of 30 mm in diameter at 1,550 nm does not exceed 0.025 dB / revolution. In some preferred embodiments, the curvature loss of 20 mm in diameter at 1,550 nm does not exceed 0.3 dB / revolution. In other preferred embodiments, the curvature loss of 20 mm in diameter at 1,550 nm does not exceed 0.1 dB / turn. In some preferred embodiments, the loss of curvature of 30 mm in diameter at 1,550 nm does not exceed 0.003 dB / revolution.
    [007] In some embodiments, the loss of curvature of 15 mm in diameter at 1,550 nm does not exceed 1 dB / revolution. In some preferred embodiments, the loss of curvature of 15 mm in diameter at 1,550 nm does not exceed 0.5 dB / revolution.
    [008] In some embodiments, the refractive index profile still provides a zero dispersion wavelength less than 1,325 nm. In preferred embodiments, the refractive index profile further provides a zero dispersion wavelength between 1,300 nm and 1,325 nm.
    [009] Preferably, the refractive index profile also provides a cable cut less than or equal to 1,260 nm.
    [010] In some preferred embodiments, the refractive index profile still provides a modal field diameter at 1,310 nm between 8.2 pm and 9.5 pm. In other preferred embodiments, the refractive index profile further provides a modal field diameter at 1,310 nm between 8.2 pm and 9.0 pm.
    [011] As used in this document, the MAC number means the diameter of the modal field at 1,310 (nm) divided by the cable cut-off wavelength of 22 m (nm). In some preferred embodiments, the refractive index profile still provides a MAC number between 6.6 and 7.5. In other preferred embodiments, the refractive index profile also provides a MAC number that does not exceed 7.3.
    [012] Preferably, the optical fiber exhibits a change in attenuation induced by maximum hydrogen below 0.03 dB / km at 1,383 nm after being subjected to hydrogen under a partial pressure of 0.01 atm for at least 144 hours. Preferably, the optical fiber has an optical attenuation at 1,383 nm that does not pass by more than 0.10 dB / km the optical attenuation at 1.310 and, more preferably, the optical attenuation at 1.383 nm is less than the optical attenuation at 1.310 nm .
    [013] From now on, we will refer in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Brief description of the drawings
    [014] Figure 1 illustrates a refractive index profile corresponding to a preferred embodiment of an optical waveguide fiber as disclosed in this document. Detailed description of the preferred embodiment
    [015] Additional features and advantages of the invention will be established in the detailed description below and assimilated by those skilled in the art by reading the description or perceived in practice as reported in the description below along with the claims and attached drawings.
    [016] The term “refractive index profile” refers to the relationship between the refractive index, or relative refractive index, and the radius of the waveguide fiber.
    [017] The “percentage of the relative refractive index” is defined as Δ% = 100 x (nj2 -nc2) / 2n2 and, as used in this document, nc is the average refractive index of undoped silica. As used in this document, the relative refractive index is represented by Δ and its values are given in units of “%”, unless otherwise specified. In cases where the refractive index of a region is less than the average refractive index of non-doped silica, the percentage of the relative index is negative and the region is considered as a lowered region or with a lowered index. In cases where the refractive index of a region is greater than the average refractive index of the coating region, the percentage of the relative index is positive. In the present document, a “superdopant” is considered to be a dopant prone to increase the refractive index in relation to pure undoped dope. In the present document, a “subdopant” is considered to be a dopant prone to decrease the refractive index in relation to pure undoped dope. Examples of superdopants include Geθ2, AI2O3, P2O5, TIOO2, Cl, Br. Examples of subdopants include fluorine and boron.
    [018] The "chromatic dispersion", in this document only called "dispersion", unless otherwise indicated, of a waveguide fiber is the sum of the material dispersion, the waveguide dispersion and the intermodal dispersion. In the case of singlemode waveguide fibers, the intermodal dispersion is zero. The zero dispersion wavelength is a wavelength in which the dispersion has a value equal to zero. The dispersion deviation is the rate of change in dispersion in relation to the wavelength.
    [019] The “real area” is defined as:
    where the integration limits are 0 to °° ef and is the transversal component of the electric field associated with the light propagated in the waveguide. As used herein, the term "real area" or "Arear" refers to the actual optical area at a wavelength of 1,550 nm, unless otherwise stated.
    [020] The term “profile a” refers to a profile of the relative refractive index, expressed in terms of Δ (r) in “%”, where r is the radius, which follows the equation
    where r0 is the point where Δ (r) is maximum, η is the point where Δ (r)% is zero and r is in the range of η <r <rt, where Δ is defined above, η is the starting point of the profile a, rf is the end point of the profile α and α is an exponent that is a real number.
    [021] The diameter of the modal field (MFD) is measured using the Petermann II method, where 2w = MFD and w2 = (2 / f2 r dr / J [df / dr] 2 r dr), the integer limits being 0 to °°.
    [022] The resistance to curvature of a waveguide fiber can be measured by the attenuation induced in prescribed test conditions, for example, by arranging or wrapping the fiber around a mandrel of prescribed diameter, for example, wrapping a loop around a 6 mm diameter, 10 mm diameter, 20 mm diameter or similar diameter mandrel (for example, “loss by macrocurvature of 1 x 10 mm in diameter” or “loss by macrocurcature of 1 x 20 mm diameters ”) and measuring the increase in attenuation per revolution.
    [023] The theoretical fiber cut wavelength, or "theoretical fiber cut", or "theoretical cut", for a given mode, is the wavelength above which the guided light does not propagate in the mode in question . We can find a mathematical definition in “Single Mode Fiber Optics", Jeunhomme, pp. 39 to 44, Marcel Dekker, New York, 1990, where the theoretical cut of the fiber is taken as the wavelength at which the modal propagation constant makes equal to the propagation constant of flat waves in the outer coating This theoretical wavelength is suitable for a perfectly straight and infinitely long fiber without variations in diameter.
    [024] The fiber cut is measured by the standard 2 m fiber cut test, FOTP-80 (EIA-TIA-455-80), in order to obtain the “fiber cut wavelength”, also known as “2 m fiber cut” or “measured cut”. The FOTP-80 standard test is performed in order to eliminate the higher order modes using a controlled amount of curvature or in order to normalize the spectral response of the fiber to that of a multi-mode fiber.
    [025] By cable cut wavelength, or “cable cut”, as used in this document, we refer to the 22 m cable cut test described in the EIA-445 Optical Fiber Test Procedures, which they are part of the EIA-TIA Optical Fiber Standards, that is, the Optical Fiber Standards of the Association of Electronic Industries - Telecommunications Sector.
    [026] Unless otherwise noted, optical properties (such as dispersion, dispersion drift etc.) are given for LP01 mode.
    [027] The optical fibers disclosed in this document are capable of presenting a real area at 1,550 nm greater than about 55 pm2, preferably between 55 pm2 and 90 pm2, more preferably between about 65 pm2 and 85 pm2. In some preferred embodiments, the actual optical mode area at 1,550 nm is between about 65 pm2 and 75 pm2.
    [028] Figure 1 illustrates an exemplary fiber 10 that includes a central fiber core region 1 with a maximum delta refractive index percentage Δi. A first recessed inner lining region 2 surrounds the central core region 1, the first inner lining region 2 having a delta refractive index percentage Δ2. An outer skin region 3 surrounds the first inner skin region 2 and comprises Δ3. In preferred embodiments, Δ-i> Δ3> Δ2. In the embodiment illustrated in figure 1, regions 1, 2 and 3 are immediately adjacent to each other. However, this is not necessary and, as an alternative, it is possible to implement an additional core or additional coating regions. For example, it would be possible to include an outer cladding region (not shown) that surrounds ring region 3 and has a percentage of delta refractive index Δ4 less than 0 in ring region 3.
    [029] The central core region 1 comprises an external radius η defined as the place where a tangent line drawn through the maximum deviation of the refractive index of the central core region 1 crosses the delta zero line. Preferably, the core 1 region has a percentage of delta refractive index Δ1 between about 0.3 and 0.5, more preferably between about 0.32 and 0.48. In some embodiments, Δ1 is preferably between 0.36 and 0.46. Preferably, the radius of the nucleus η is between 3 pm and 6 pm, more preferably, between about 3.5 pm and 5.0 pm. The central core region 1 may comprise a step index and single segment profile. Preferably, the central core region 1 comprises alpha between 10 and 100 and, in some cases, alpha can be between 15 and 40.
    [030] In the embodiment illustrated in figure 1, the inner lining region 2 surrounds the central core region 1 and comprises an inner radius η and an outer radius r2, η being defined as indicated above and r2 being defined as where the curve of the refractive index profile crosses the delta zero line. In some cases, the refractive index in region 2 is essentially uniform. In other cases, there may be a gradient index profile. In still other cases, there may be fluctuations due to a small profile design or variations in the process. In some embodiments, the inner lining region 2 comprises silica, which is substantially neither doped with fluorine nor germanium, that is, so that the region is, in essence, free of fluorine and germanium. The inner lining region 2 comprises a percentage of the delta refractive index Δ2 calculated by:

    [031] Preferably, the inner lining region 2 has a width between about 3 pm and 13 pm, more preferably 4 pm and 12 pm, even more preferably between about 7 pm to 9 pm. Preferably, the ratio of the radius of the core η to the radius r2 of the inner lining region 2 is greater than 0.25, more preferably between about 0.3 and 0.55.
    [032] The outer cladding region 3 surrounds the sunken annular region 3 and comprises a percentage of the delta refractive index Δ3 greater than the Δ2 index of the inner cladding region 3, thus forming a region that is an “overlapped outer cladding region. ”3 in relation to the inner coating region 2, for example, adding an amount of dopant (such as germanium or chlorine) sufficient to increase the refractive index of the outer coating region. It is worth noting, however, that it is not crucial for region 3 to be overdosed in the sense that an index increase dopant is included in region 3. In fact, the same type of higher index effect in the outer coating region 3 can be obtained by sub-dividing the inner lining region 2 in relation to the outer lining region 3. The outer lining region 3 comprises a higher refractive index than the inner lining region 2 and preferably comprises a percentage of refractive index delta Δ3 greater than 0.01, and which can be greater than 0.02 or 0.03. Preferably, the higher index part (compared to the inner sheath region 2) of the outer sheath region 3 extends at least to the point where the optical energy that will be transmitted through the optical fiber is greater than or equal to 90% of the transmitted optical energy, more preferably, to the point where the optical energy that will be transmitted through the optical fiber is greater than or equal to 95% of the transmitted optical energy and, even more preferably, to the point where the optical energy that will be transmitted through the fiber optics is greater than or equal to 98% of the transmitted optical energy. In several embodiments, this is possible by making the third “oversized” ring region extend at least to a radial point of about 30 pm. Therefore, the volume V3 of the third ring region 3 is defined in this document as calculated by Δ (3-2) dr / rdr between the radius r2 and r30 (the radius at 30 pm) and, therefore, is defined by

    [033] The volume V3 of the outer coating region (within 30 pm), compared to that of the inner coating region 2, is preferably greater than 5, more preferably greater than 7, and may be greater than 10 % Δpm2. This V3 of the outer coating region (within 30 pm) is, in some embodiments, less than 80% Δpm2.
    [034] In some embodiments, the Δ3 refractive index of the outer facing region is greater than 0.01%, more preferably greater than 0.2%, compared to that of the inner facing region 2. In some embodiments, the third ring region comprises chlorine (Cl) in an amount greater than 1,000 ppm, more preferably, greater than 1,500 ppm and, most preferably, greater than 2,000 ppm (0.2%) by weight.
    [035] Preferably, the core 1 region has a positive refractive index along it. Core 1 comprises a maximum relative refractive index ΔMAX that occurs between r = 0 pm and r = 3 pm. Preferably, ΔMAX θ greater than 0.32% to 0.48%.
    [036] Preferably, the inner lining region 2 has a substantially constant relative refractive index profile, that is, the difference between the relative refractive index in any two rays within the intermediate region is less than 0.02% and , in some preferred embodiments, less than 0.01%. Therefore, the profile of the relative refractive index of the inner lining region 20 is preferably substantially uniform in shape.
    [037] Core region 1 can be a step-index core and comprise an alpha (a) format. In preferred embodiments, n is less than 8.0 pm, preferably less than 6.0 pm. Preferably, n is between 3.50 pm and 5.6 pm. The fibers are capable of presenting a loss in curvature of less than 0.15dB / turn when wound around a mandrel with a radius of 20 mm in the case of fibers with MAC number between 6.6 and 7.5. The optical fiber disclosed in this document has a MAC number that does not exceed 7.3 and a zero dispersion wavelength less than 1,450 nm.
    [038] The various exemplary embodiments will be better understood by the following examples. It will be evident to those skilled in the art the possibility of making various modifications and variations in the present invention without departing from the essence or the scope of the claims.
    [039] Table 1 below lists the characteristics of illustrative examples modeled from 1 to 9 with refractive index as shown in figure 1. In particular, the delta Ai, alfai and external radius η refraction index is defined below for each example. of the central core region 1, the delta refraction index Δ2 and the outer radius r2 of the inner cladding region 2, the delta refractive index Δ3 and the volume V3 of the outer cladding region 3, which is calculated between the inner radius r2 of the outer coating region 3 and a radial distance of 30 pm (and between the refractive indices Δ3 and Δ2). The theoretical cut-off wavelength in nm, the diameter of the modal field at 1,310 nm, the actual area at 1,310 nm, the chromatic dispersion at 1,310 nm, the dispersion deviation at 1,310 nm, the attenuation at 1,310 nm, are also defined the diameter of the modal field at 1,550 nm, the real area at 1,550 nm, the chromatic dispersion at 1,550 nm, the dispersion deviation at 1,550 nm, the attenuation at 1,550 nm and the induced curvature loss of 1 x 10 mm in diameter in dB per turn at 1,550 nm. In table 1, these properties are modeled. Table 1





    [040] Table 2 below lists characteristics of real illustrative examples manufactured from 10 to 15 with a refractive index as shown in figure 1. In particular, the delta refractive index Ai and the external radius η are defined below for each example. of the central core region 1, the delta refractive index Δ2 and the outer radius rs of the inner cladding region 2, the delta refractive index Δ3 and the volume V3 of the outer cladding region 3, which is calculated between the inner radius rs of the outer coating region 3 and a radial distance of 30 pm (and between the refractive indices Δ3 and Δs). The theoretical cut-off wavelength in nm, the diameter of the modal field at 1,310 nm, the actual area at 1,310 nm, the chromatic dispersion at 1,310 nm, the dispersion deviation at 1,310 nm, the attenuation at 1,310 nm, are also defined the diameter of the modal field at 1,550 nm, the real area at 1,550 nm, the chromatic dispersion at 1,550 nm, the dispersion deviation at 1,550 nm, the attenuation at 1,550 nm and the induced curvature loss of 1 x 10 mm in diameter in dB per turn at 1,550 nm. In table 2, these properties are measured in real optical fibers. Table 2




    [041] As we can see in both tables 1 and 2 above, the examples in this document show exemplary fibers with a central glass core region with Δi index, a first internal coating region with Δ2 index and an external coating region with Δ3 index; where Δ1> Δ3> Δ2, where the difference between Δ3 and Δ2 is greater than or equal to 0.01 and an absolute value of the profile volume, | V3 |, is at least 5% pm2. These fibers have a cable cut of less than or equal to 1,260 nm and a loss in curvature of less than 0.75 dB / turn when wrapped around a 20 mm diameter mandrel. These fibers also have a modal field diameter between about 8.2 and 9.5 pm at 1,310 nm, a zero dispersion wavelength between 1,300 and 1,324 nm, and a dispersion deviation at 1,310 nm less than 0.09 ps / nm2 / km. Many of these fibers also show loss of curvature at 1,550 nm, when wrapped around a 15 mm diameter mandrel, less than 1 dB / revolution and, in some cases, less than 0.5 dB / revolution. These fibers also show loss of curvature at 1,550 nm, when wrapped around a 20 mm diameter mandrel, less than 0.75 dB / revolution, more preferably less than 0.3 dB / revolution, and, in some fibers, more preferably, less than 0.1 dB / turn. These fibers also show loss of curvature at 1,550 nm, when wrapped around a mandrel of 30 mm in diameter, less than 0.025 dB / turn and, in some fibers, more preferably, less than 0.003 dB / turn. Some of these examples use chlorine in the outer coating region in an amount greater than 2,000 ppm and, in some cases, greater than 3,000 ppm or even greater than 4,000 ppm by weight.
    [042] Preferably, the (spectral) attenuation at 1,550 nm is less than 0.21 dB / km, more preferably less than 0.20 dB / km, even more preferably less than 0.197 dB / km.
    [043] Therefore, the optical fibers described in this document provide incredible curvature performance and, in addition, provide cutting wavelengths suitable for single-mode operation at wavelengths greater than about 1,260 nm.
    [044] In some embodiments, the core comprises a relative refractive index profile with a so-called centerline curve due to one or more techniques for making optical fiber. However, the centerline curve in any of the refractive index profiles disclosed in this document is optional.
    [045] The optical fiber disclosed in this document comprises a core and a sheath layer (or outermost sheath or annular sheath region) that surrounds the core and is directly adjacent to it. Preferably, the core is composed of germanium-doped silica. Dopants other than germanium, separately or together, can be used in the core and, in particular, in the center line or near it, of the optical fiber disclosed in this document to obtain the desired refractive index and density. In preferred embodiments, the optical fiber core disclosed in this document has a non-negative refractive index profile, more preferably, a positive refractive index profile, in which the core is surrounded by a coating layer and directly adjacent to it .
    [046] Preferably, the optical fiber disclosed in this document has a silica-based core and coating. In preferred embodiments, the coating has an outside diameter, 2 * Rmax, of about 125 µm.
    [047] The optical fiber disclosed in this document can be surrounded by a protective layer, for example, a primary layer P that makes contact with the outer coating region 3 and surrounds it, the primary layer P having a Young modulus less than 1 , 0 MPa, preferably less than 0.9 MPa, and, in preferred embodiments, not exceeding 0.8 MPa, and also comprises a secondary layer S that makes contact with the primary layer P and surrounds it, the secondary layer S having a Young's modulus greater than 1,200 MPa, and, in preferred embodiments, greater than 1,400 MPa.
    [048] As used in this document, Young's modulus, elongation to break and tensile strength of cured polymeric material from a primary layer are measured using a tensile test instrument (for example, a tensile tester) Sintech MTS traction or an INSTRON universal material testing system) on a sample of material in the form of a film about 76 pm to 102 pm thick and about 1.3 cm wide, with a usable length of 5, 1 cm and a test speed of 2.5 cm / min.
    [049] An additional description of suitable primary and secondary layers can be found in PCT publication W02005 / 010589, which is incorporated into this document by reference in its entirety.
    [050] Preferably, the optical fibers disclosed in this document have a low OH content and preferably have an attenuation curve that shows a relatively low water spike, or that does not even have a water spike, in a region of specific wave, especially in the E-band. Methods for producing optical fibers with a low water peak can be found in PCT order publications n-WOOO / 64825, WO01 / 47822 and W002 / 051761, the contents of which are hereby incorporated by reference. Preferably, the optical fiber disclosed in this document has an optical (spectral) attenuation at 1,383 nm that does not pass at more than 0.10 dB / km an optical attenuation at 1.310 nm and, more preferably, that does not exceed the optical attenuation at 1.310 nm. Preferably, the optical fiber disclosed in this document exhibits a maximum hydrogen-induced attenuation change of less than 0.03 dB / km at 1,383 nm after being subjected to a hydrogen atmosphere, for example, hydrogen under partial pressure of 0.01 atm per at least 144 hours.
    [051] A low water spike generally allows for less attenuation losses, especially in the case of transmission signals between about 1,340 nm and about 1,470 nm. In addition, a low water spike also provides greater pump efficiency to a pump light emitting device that optically couples to the optical fiber, such as a Raman pump or Raman amplifier, which can operate at one or more wavelengths pump. Preferably, a Raman amplifier pumps at one or more wavelengths about 100 nm less than any desired wavelength or operating wavelength region. For example, an optical fiber that carries an operational signal at a wavelength of about 1,550 nm can be pumped with a Raman amplifier at a pump wavelength of around 1,450 nm. Thus, the lower attenuation of the fiber in the region of the wavelength from about 1,400 nm to about 1,500 nm would tend to decrease the pump attenuation and increase the efficiency of the pump, for example, gain per mW of pump power, in special for pump lengths around 1,400 nm.
    [052] The fibers disclosed in this document have low PMD values, especially when manufactured by OVD processes. The rotation of the optical fiber can also decrease PMD values for the fiber disclosed in this document.
    [053] It should be kept in mind that the above description is given by way of example only and is intended to provide an overview for understanding the nature and character of the optical fibers defined in the claims. The attached drawings have been included to enable a better understanding of the preferred embodiments, as well as being incorporated into and describing this report. The drawings illustrate various features and embodiments that, together with the description, serve to explain the principles and operation of the present invention. It will be evident to those skilled in the art the possibility of making several modifications to the preferred embodiments as described in this document without departing from the essence or the scope of the attached claims.
    权利要求:
    Claims (8)
    [0001]
    1. Optical fiber, characterized by the fact that it comprises: a region of central core doped with germanium with an external radius n the refractive index Δ1 a region of coating that comprises a first region of internal coating, which has an external radius r2> 8 microns and refractive index Δ2, and a second outer coating region around the inner coating region, which has refractive index Δ3; where Δ1>Δ3> Δ2, where the volume of profile V3 of the outer cladding region, calculated between the outer radius of the first inner cladding region and a radial distance of 30 pm, is equal to:
    [0002]
    2. Optical fiber according to claim 1, characterized by the fact that the first inner coating region contains less than 0.02% by weight of fluorine.
    [0003]
    3. Optical fiber, according to claim 1, characterized by the fact that the first region of internal coating is, in essence, free of fluorine and germanium.
    [0004]
    4. Optical fiber, according to claim 1, characterized by the fact that Δ3> Δ2 for a length that extends from r2 to a radius of at least 30 microns.
    [0005]
    5. Optical fiber according to claim 1, characterized by the fact that r-i / r2 is greater than 0.3.
    [0006]
    6. Optical fiber, according to claim 1, characterized by having a loss in curvature of less than 0.75dB / turn when wrapped around a mandrel with a radius of 20 mm and by having a MAC number between 6.6 and 7 , 5.
    [0007]
    7. Optical fiber according to claim 1, characterized by the fact that the width of the first internal coating region r2-n is between 3 and 13 microns.
    [0008]
    8. Optical fiber, according to claim 6, characterized by having a loss in curvature of less than 1 dB / turn when wound in a mandrel with a radius of 15 mm.
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPH03115136A|1989-09-29|1991-05-16|Shin Etsu Chem Co Ltd|Optical fiber preform and its production|
    JP3738510B2|1997-01-16|2006-01-25|住友電気工業株式会社|Optical fiber and manufacturing method thereof|
    EP1082270A1|1998-05-01|2001-03-14|Corning Incorporated|Method of making optical fibers|
    JP4192425B2|1998-12-17|2008-12-10|住友電気工業株式会社|Optical fiber|
    BR0009970A|1999-04-26|2002-01-08|Corning Inc|Low water peak optical waveguide fiber and method of manufacturing it|
    CN1302300C|1999-07-12|2007-02-28|株式会社藤仓|Dispersion shift optical fibre|
    WO2001047822A1|1999-12-28|2001-07-05|Corning Incorporated|Low water peak optical waveguide and method of manufacturing same|
    JP2001264569A|2000-03-14|2001-09-26|Sumitomo Electric Ind Ltd|Dispersion compensating optical fiber and optical transmission system|
    US6904772B2|2000-12-22|2005-06-14|Corning Incorporated|Method of making a glass preform for low water peak optical fiber|
    JP2003054995A|2001-06-05|2003-02-26|Furukawa Electric Co Ltd:The|Optical fiber preform, method for manufacturing the same and optical fiber|
    JP2003114347A|2001-07-30|2003-04-18|Furukawa Electric Co Ltd:The|Single mode optical fiber, method and device for manufacturing the same|
    US7715675B2|2003-07-18|2010-05-11|Corning Incorporated|Optical fiber coating system and coated optical fiber|
    JP4286863B2|2004-10-22|2009-07-01|株式会社フジクラ|Optical fiber|
    CN101523259B|2006-08-31|2013-01-23|康宁股份有限公司|Low bend loss single mode optical fiber|
    US7526169B2|2006-11-29|2009-04-28|Corning Incorporated|Low bend loss quasi-single-mode optical fiber and optical fiber line|
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    WO2008136918A2|2007-05-07|2008-11-13|Corning Incorporated|Large effective area fiber|
    EP2003476A1|2007-06-15|2008-12-17|Furukawa Electric North America Inc. |Bend insensitivity in single mode optical fibers|
    US8374472B2|2007-06-15|2013-02-12|Ofs Fitel, Llc|Bend insensitivity in single mode optical fibers|
    US8175437B2|2008-02-07|2012-05-08|Corning Incorporated|Microstructured transmission optical fiber|
    US8081855B2|2008-02-22|2011-12-20|Sumitomo Electric Industries, Ltd.|Optical fiber and optical cable|
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    US8588569B2|2011-11-30|2013-11-19|Corning Incorporated|Low bend loss optical fiber|
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    US9188736B2|2013-04-08|2015-11-17|Corning Incorporated|Low bend loss optical fiber|
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    KR101628970B1|2013-08-08|2016-06-10|대한광통신 주식회사|Methode for Enhanced fiber-optic for loss of bending|
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    RU2655992C1|2017-05-17|2018-05-30|Российская Федерация, от имени которой выступает ФОНД ПЕРСПЕКТИВНЫХ ИССЛЕДОВАНИЙ|Waveguides bends creation method|
    JP2018205357A|2017-05-30|2018-12-27|株式会社フジクラ|Optical fiber, method of manufacturing optical fiber, and optical fiber preform|
    EP3729151A1|2017-12-21|2020-10-28|Draka Comteq France|Bending-loss insensitve single mode fibre, with a shallow trench, and corresponding optical system|
    US11048039B2|2018-02-13|2021-06-29|Fujikura Ltd.|Optical fiber|
    JPWO2021090912A1|2019-11-08|2021-11-25|株式会社フジクラ|Optical fiber|
    法律状态:
    2019-01-08| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2019-09-03| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|
    2020-02-18| B06A| Notification to applicant to reply to the report for non-patentability or inadequacy of the application according art. 36 industrial patent law|
    2020-07-07| B09A| Decision: intention to grant|
    2020-11-17| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 22/02/2011, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US30862510P| true| 2010-02-26|2010-02-26|
    US61/308.625|2010-02-26|
    PCT/US2011/025633|WO2011106293A1|2010-02-26|2011-02-22|Low bend loss optical fiber|
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