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公开(公告)号：US20130094819A1
公开(公告)日：2013-04-18
申请号：US13609568
申请日：2012-09-11
CPC分类号： G02B6/0285 , G02B6/03627 , G02B6/0365 , G02B6/14 , G02B6/255 , G02B6/26
摘要： There is provided an optical transmission line that includes a bend insensitive fiber (BIF) defined by ITU-T Recommendation G.657 and that reduces the influence of MPI. An optical transmission line 1 includes a first optical fiber 11, a second optical fiber 12 joined to an incident end of the first optical fiber 11, and a third optical fiber 13 joined to an exit end of the first optical fiber 11. The first optical fiber 11 is a bend insensitive fiber (BIF), and each of the second optical fiber 12 and the third optical fiber 13 is a general single mode optical fiber. An attenuation coefficient of an LP11 mode in the first optical fiber 11 at a wavelength of 1310 nm, a splice loss between the first optical fiber and the second optical fiber, a splice loss between the first optical fiber and the third optical fiber, and a length of the first optical fiber satisfy a predetermined relational equation.
摘要翻译： 提供了一种光传输线，其包括由ITU-T G.657建议书定义的弯曲不敏感光纤（BIF），并减少MPI的影响。 光传输线1包括第一光纤11，连接到第一光纤11的入射端的第二光纤12和与第一光纤11的出口端连接的第三光纤13.第一光 光纤11是弯曲不敏感光纤（BIF），第二光纤12和第三光纤13都是一般的单模光纤。 第一光纤11中的波长1310nm处的LP11模式的衰减系数，第一光纤与第二光纤之间的接合损耗，第一光纤与第三光纤之间的接合损耗，以及 第一光纤的长度满足预定的关系式。
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公开(公告)号：US20100236289A1
公开(公告)日：2010-09-23
申请号：US12789111
申请日：2010-05-27
IPC分类号： C03C17/00
CPC分类号： C03B23/043 , C03B37/01242 , C03B37/01257 , C03B37/01815
摘要： In a glass processing method according to the invention, in the case of performing chemical vapor deposition or diameter shrinkage of a substrate glass tube G by relatively moving a heating furnace 20 comprising a heating element 21 for annularly enclosing the circumference of the substrate glass tube in a longitudinal direction of the substrate glass tube G with respect to the substrate glass tube G in which an outer diameter is 30 mm or more and a wall thickness is 3 mm or more and is less than 15 mm and an ovality of the outer diameter is 1.0% or less using a glass processing apparatus 1, a temperature of at least one of the heating element 21 and the substrate glass tube G is measured and the amount of heat generation of the heating element 21 is adjusted based on the measured temperature.
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公开(公告)号：US20120274928A1
公开(公告)日：2012-11-01
申请号：US13454382
申请日：2012-04-24
申请人： Tetsuya NAKANISHI
发明人： Tetsuya NAKANISHI
IPC分类号： G01N21/00
CPC分类号： G01M11/088 , G01J3/0218 , G01J3/10 , G01J3/32
摘要： A method for accurately measuring the cutoff wavelength of a high order mode of an optical fiber includes a first step of measuring power spectrum P1(λ) of light output from a light source; a second step of measuring power spectrum P2(λ) of light emitted from one end of a test fiber when light output from the light source is made incident on the other end of the test fiber placed in a form (preferably spiral) allowing the curvature to vary in the longitudinal direction thereof; a third step of obtaining difference spectrum P(λ) representing the difference between the power spectrum P2(λ) and the power spectrum P1(λ); and a fourth step of obtaining the cutoff wavelength of a high order mode of the test fiber on the basis of the difference spectrum P(λ).
摘要翻译： 一种用于精确测量光纤的高阶模式的截止波长的方法包括：测量从光源输出的光的功率谱P1（λ）的第一步骤; 测量从光源输出的光的光从测试光纤的一端发射的光的功率谱P2（λ）入射到测试光纤的另一端（第二步），该测试光纤以允许曲率 在其纵向方向上变化; 获得表示功率谱P2（λ）和功率谱P1（λ）之间的差的差分谱P（λ）的第三步骤。 以及基于差谱P（λ）获得测试光纤的高阶模式的截止波长的第四步骤。
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公开(公告)号：US20110222824A1
公开(公告)日：2011-09-15
申请号：US13113668
申请日：2011-05-23
CPC分类号： G02B6/0365 , G02B6/02395 , G02B6/4433
摘要： Provided is an optical fiber that has a small bending loss, can be securely prevented from being fractured due to accidental bending during installation or other operations, and is compliant with the G. 652 standard. An optical fiber 1 includes a core 11, a first cladding 12, a second cladding 13, and a third cladding 14. The relative refractive index difference Δ1 of the core 11 is in the range of 0.3% to 0.38%, the relative refractive index difference Δ2 of the first cladding 12 is equal to or smaller than 0%, and the relative refractive index difference Δ3 of the second cladding 13 is in the range of −1.8% to −0.5%. The inner radius r2 and the outer radius r3 of the second cladding 13 satisfy the expression “0.4r2+10.5
摘要翻译： 提供了具有小弯曲损耗的光纤，可以可靠地防止由于安装或其他操作期间的意外弯曲而导致的断裂，并且符合G.652标准。 光纤1包括芯11，第一包层12，第二包层13和第三包层14.芯11的相对折射率差Dgr; 1在0.3％至0.38％的范围内，相对 第一包层12的折射率差Dgr2等于或小于0％，第二包层13的相对折射率差Dgr 3在-1.8％至-0.5％的范围内。 第二包层13的内半径r2和外半径r3满足表达式“0.4r2 + 10.5
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公开(公告)号：US20120312054A1
公开(公告)日：2012-12-13
申请号：US13486292
申请日：2012-06-01
申请人： Tetsuya NAKANISHI
发明人： Tetsuya NAKANISHI
IPC分类号： C03B37/018 , C03B37/07
CPC分类号： C03B37/01294 , C03B37/07 , Y02P40/57
摘要： Apparatus and methods for making an optical fiber preform at low cost avoiding the apparatus from being damaged are provided. Apparatus for making an optical fiber preform by depositing glass particles on the circumferential surface of a glass rod comprises: a chamber, a plasma torch, a glass particle supplying part, a composition modification gas supplying part, and an exhaust part. The chamber surrounds the heating portion of the glass rod heated by the plasma torch. The plasma torch heats the glass particles by a plasma flame. The glass particle supplying part introduces glass particles towards the heating portion of the glass rod in the chamber. The composition modification gas supplying part introduces composition modification gas into the chamber in order to modify the composition of the glass particles to be deposited on the heating portion of the glass rod in the chamber.
摘要翻译： 提供了一种低成本制造光纤预制件避免设备损坏的装置和方法。 用于通过在玻璃棒的圆周表面上沉积玻璃颗粒来制造光纤预制件的装置包括：室，等离子体焰炬，玻璃颗粒供应部分，组合物改性气体供应部分和排气部分。 该室围绕由等离子体焰炬加热的玻璃棒的加热部分。 等离子体焰炬通过等离子体火焰加热玻璃颗粒。 玻璃粒子供给部将玻璃粒子向室内的玻璃棒的加热部引入。 组合物改性气体供给部分将组成改性气体引入室中，以便改变要沉积在室中的玻璃棒的加热部分上的玻璃颗粒的组成。
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