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1. 发明授权

US06640038B2 Dispersion managed fibers having reduced sensitivity to manufacturing variabilities 失效
公开(公告)号：US06640038B2
公开(公告)日：2003-10-28
申请号：US09853070
申请日：2001-05-09
申请人： V. Srikant
发明人： V. Srikant
IPC分类号： G02B618
CPC分类号： G02B6/02004 , G02B6/02247 , G02B6/03611 , G02B6/03644 , G02B6/03677 , G02B6/29376
摘要： Dispersion managed fibers which preferably have a central core region, a moat region, and a ring region are provided. The central core region preferably has an alpha profile with an alpha value preferably less than about 2.3. The moat region preferably includes four sub-regions, namely, a first sub-region (11) in which the index of refraction decreases, a second sub-region (12) in which the index of refraction increases substantially linearly, a fourth sub-region (14) in which the index of refraction again increases substantially linearly, and a third sub-region (13) which serves as a transition region which smoothly connects the third and fourth substantially linear sub-regions. The dispersion managed fibers preferably have the following properties: (a) they exhibit reduced sensitivity to manufacturing variabilities, (b) they have relatively small changes in mode field diameter at the junctions between fiber sections having positive dispersions and fiber sections having negative dispersions, and/or (c) they can be readily manufactured using the tablet method.

2. 发明授权

US06493495B1 Large effective area waveguide fiber 有权
标题翻译：大面积有效面积的光纤
公开(公告)号：US06493495B1
公开(公告)日：2002-12-10
申请号：US09610020
申请日：2000-07-05
申请人： Yanming Liu , Mark A. Newhouse
发明人： Yanming Liu , Mark A. Newhouse
IPC分类号： G02B618
CPC分类号： G02B6/03666 , G02B6/02014 , G02B6/02019 , G02B6/02238 , G02B6/0281 , G02B6/0286 , G02B6/03611 , G02B6/03633 , G02B6/03644
摘要： A single mode optical waveguide fiber having a segmented core designed to provide a large effective area for light transmission. The large effective area reduces waveguide fiber non-linearities. The inventive waveguide is thus suited for transmission of high power signals over long distances. Embodiments of the inventive single mode waveguide including five core segments are given. The large effective area is achieved with essentially no degradation in optical or mechanical performance of the waveguide.
摘要翻译：一种单模光纤，其具有被设计成为光透射提供大的有效面积的分段芯。大的有效面积降低了波导纤维的非线性。因此，本发明的波导适合于长距离传输高功率信号。给出了包括五个核心段的本发明单模波导的实施例。在波导的光学或机械性能基本上没有劣化的情况下实现了大的有效面积。

3. 发明授权

US06490396B1 Optical waveguide fiber 有权
标题翻译：光纤光纤
公开(公告)号：US06490396B1
公开(公告)日：2002-12-03
申请号：US09641580
申请日：2000-08-18
申请人： David K. Smith
发明人： David K. Smith
IPC分类号： G02B618
CPC分类号： G02B6/03633 , G02B6/02019 , G02B6/02214 , G02B6/02238 , G02B6/02266 , G02B6/0281 , G02B6/0285 , G02B6/0286
摘要： Disclosed is a single mode optical waveguide having a core refractive index profile defined by upper and lower boundary profiles on a chart of relative index percent versus radius. The relative refractive index as a function of radial dimensions of the core are selected to provide an optical waveguide fiber having properties suitable for a high performance telecommunication system operating in the wavelength window of about 1530 nm to 1625 nm. Refractive index profile designs encompassing the wavelength window 1250 nm to 1350 nm are also disclosed. The embodiments of the core waveguide have exceptionally low total dispersion slope and attenuation over these wavelength windows.
摘要翻译：公开了一种单模光波导，其具有在相对折射率百分比对半径的图表上由上边界和下边界轮廓限定的纤芯折射率分布。选择作为芯的径向尺寸的函数的相对折射率以提供具有适合于在约1530nm至1625nm的波长窗中工作的高性能电信系统的性质的光波导光纤。还公开了包括波长窗1250nm至1350nm的折射率分布图。核心波导的实施例在这些波长窗口上具有非常低的总色散斜率和衰减。

4. 发明授权

US06798962B2 Broadband access optimized fiber and method of making 有权
标题翻译：宽带接入优化光纤及其制作方法
公开(公告)号：US06798962B2
公开(公告)日：2004-09-28
申请号：US10085798
申请日：2002-02-26
申请人： George E. Berkey , Yanming Liu , Walter F. Love , Daiping Ma
发明人： George E. Berkey , Yanming Liu , Walter F. Love , Daiping Ma
IPC分类号： G02B618
CPC分类号： G02B6/0288 , G02B6/02019 , G02B6/02047 , G02B6/02266
摘要： The present invention provides an optical fiber, comprising a core having an alpha parameter in the range of approximately 2 to approximately 8, a maximum index percent difference between the core and a cladding in the range of approximately 0.3% to approximately 0.5% and a core diameter in the range of approximately 6.0 to approximately 16.0 &mgr;m and a cladding. The optical fiber has a bandwidth of at least approximately 0.6 GHz.km at 850 nm, and is configured for multimode operation at a wavelength less than 1300 nm and single mode operation at a wavelength of at least approximately 1300 nm. The fiber also has significantly reduced intermodal noise. The present invention also includes a method of designing such a fiber, a fiber optic system provided such a fiber and a method of operating a fiber optic system with such a fiber.
摘要翻译：本发明提供了一种光纤，其包括具有约2至约8范围内的α参数的芯，在芯和包层之间的最大折射率百分比差在约0.3％至约0.5％的范围内，并且芯直径在约6.0至约16.0μm的范围内和包层。该光纤在850nm处具有至少约0.6GHz.km的带宽，并且被配置为在小于1300nm的波长下进行多模操作，并且在至少约1300nm的波长下进行单模操作。光纤也显着降低了多式联运噪声。本发明还包括设计这种光纤的方法，提供这种光纤的光纤系统和使用这种光纤操作光纤系统的方法。

5. 发明授权

US06597848B1 Dispersion compensating fiber 失效
标题翻译：色散补偿光纤
公开(公告)号：US06597848B1
公开(公告)日：2003-07-22
申请号：US09558649
申请日：2000-04-26
申请人： George E. Berkey , Lei Jiang , Dale R. Powers , V. Srikant
发明人： George E. Berkey , Lei Jiang , Dale R. Powers , V. Srikant
IPC分类号： G02B618
CPC分类号： G02B6/03688 , C03B37/01413 , C03B37/01446 , C03B2201/12 , C03B2201/31 , C03B2203/22 , C03B2203/23 , C03B2203/26 , C03B2203/36 , C03B2207/36 , G02B6/02261 , G02B6/03677
摘要： Disclosed is a dispersion compensating optical fiber that includes a core surrounded by a cladding layer of refractive index nCL. The core includes at least three radially adjacent regions, a central core region, a moat region having a refractive index nM that is sufficiently lower than nCL such that &Dgr;M≦−0.4%, and a ring region. As the ring region exhibits sufficiently high refractive index at a sufficiently long distance from the outer edge of the moat region, the fiber can exhibit low values of negative dispersion slope at low values of negative dispersion and yet exhibit good bending loss. This ring region is also capable of imparting to the fiber a relatively high cutoff wavelength, so that the present invention is particularly well suited for use in L-band systems. A particularly suitable fiber has an index profile in which that part of the ring region at the transition between the moat and the ring region has a refractive index such that its delta value is close to zero. Also disclosed is a method of forming the fiber of the present invention.
摘要翻译：公开了一种色散补偿光纤，其包括由折射率nCL的包覆层包围的芯。芯包括至少三个径向相邻的区域，中心芯区域，具有足够低于nCL的折射率nM的护城河区域，使得DELTAM <= -0.4％，以及环形区域。由于环形区域在距离护城河区域的外边缘足够长的距离处呈现足够高的折射率，所以在低分散负值下，纤维可以表现出低的负色散斜率值，并表现出良好的弯曲损耗。该环形区域还能够赋予纤维相当高的截止波长，使得本发明特别适用于L波段系统。特别合适的纤维具有折射率分布，其中在护环和环区之间的转变处的环区的那部分具有折射率使得其δ值接近于零。还公开了形成本发明的纤维的方法。

6. 发明授权

US06280850B1 Optical fiber preform having OH barrier and manufacturing method thereof 有权
标题翻译：具有OH屏障的光纤预制件及其制造方法
公开(公告)号：US06280850B1
公开(公告)日：2001-08-28
申请号：US09344368
申请日：1999-06-25
申请人： Sung-koog Oh , Man-seok Seo , Mun-hyun Do , Jin-seong Yang
发明人： Sung-koog Oh , Man-seok Seo , Mun-hyun Do , Jin-seong Yang
IPC分类号： G02B618
CPC分类号： G02B6/03694 , C03B37/01807 , C03B2201/12 , C03B2201/31 , C03B2203/22 , C03B2203/24 , G02B6/0281 , G02B6/03683 , Y10T428/1317 , Y10T428/24942
摘要： An optical fiber preform having a substrate tube, a cladding layer and a core layer further includes a first barrier layer deposited by a material having a low OH diffusion coefficient between the substrate tube and the cladding layer, wherein the first barrier layer is for substantially preventing OH contained in the substrate tube from being diffused into the cladding layer. The optical fiber preform further includes a second barrier layer formed by depositing a material having a low OH diffusion coefficient between the cladding layer and core layer, for substantially preventing OH which has been diffused into the cladding layer from the substrate tube from being diffused further into the core layer. Outer and inner OH barriers containing no P2O5 are deposited between the substrate tube and the cladding layer and between the cladding layer and the core layer in a deposition process, such that OH can be effectively prevented from being diffused from the substrate tube to the core layer in a core deposition process, a collapsing process or a closing process.
摘要翻译：具有衬底管，包覆层和芯层的光纤预制件还包括通过在衬底管和包覆层之间具有低OH扩散系数的材料沉积的第一阻挡层，其中第一阻挡层用于基本上防止包含在基体管中的OH扩散到包层中。光纤预型体还包括通过在包覆层和芯层之间沉积具有低的OH扩散系数的材料而形成的第二阻挡层，用于基本上防止已经从衬底管扩散到包覆层中的OH进一步扩散到核心层。在沉积工艺中，在衬底管和包覆层之间以及包覆层和芯层之间沉积不含P2O5的外部和内部OH屏障，使得可以有效地防止OH从衬底管扩散到芯层在核心沉积过程中，崩溃过程或闭合过程。

7. 发明授权

US06795629B2 Optical fiber and optical communication system using this optical fiber 有权
公开(公告)号：US06795629B2
公开(公告)日：2004-09-21
申请号：US10642630
申请日：2003-08-19
申请人： Kazunori Mukasa , Naomi Kumano
发明人： Kazunori Mukasa , Naomi Kumano
IPC分类号： G02B618
CPC分类号： G02B6/02009 , C03B2203/22 , C03B2203/36 , G02B6/02242 , G02B6/02271 , G02B6/0281 , G02B6/03644 , G02B6/03666 , G02B6/03688
摘要： The present invention resides in an optical fiber able to form an optical transmitting line for wavelength division multiplexing transmission in a wavelength band of 1.5 &mgr;m using a Raman amplifier, and an optical communication system using this optical fiber. The optical fiber has an effective core area from 40 &mgr;m2 to 60 &mgr;m2 in a set wavelength band of at least one portion of a wavelength band of 1.5 &mgr;m; a dispersion value from 4 to 10 ps/nm/km at a wavelength of 1.55 &mgr;m; a dispersion slope set to a positive value equal to or smaller than 0.04 ps/nm2/km in a wavelength band of 1.55 &mgr;m; and a zero dispersion wavelength equal to or smaller than 1.4 &mgr;m. Further, a cutoff wavelength is set to be equal to or smaller than 1.5 &mgr;m at a length of 2 m, and a bending loss is set to be equal to or smaller than 5 dB/m at a diameter of 20 mm in the wavelength band of 1.5 &mgr;m. In a refractive index profile of the optical fiber, for example, a relative refractive index difference &Dgr;1 of a first glass layer as an innermost layer with respect to a reference layer, and a relative refractive index difference &Dgr;3 of the refractive index of a third glass layer as a third layer from an inner side with respect to the reference layer are set to be positive. Further, a relative refractive index difference &Dgr;2 of a second glass layer as a second layer from the inner side with respect to the reference layer is set to be negative.

8. 发明授权

US06748151B1 Optical fiber attenuator with attenuating dopant limited to a central or peripheral area of the fiber core 有权
标题翻译：具有衰减掺杂剂的光纤衰减器限于光纤芯的中心或周边区域
公开(公告)号：US06748151B1
公开(公告)日：2004-06-08
申请号：US09868766
申请日：2001-06-21
申请人： Masaru Watanabe , Eiji Matsuyama , Akiyoshi Naruse , Yuichi Murakami , Kenichi Muta , Toyomitsu Yamamoto
发明人： Masaru Watanabe , Eiji Matsuyama , Akiyoshi Naruse , Yuichi Murakami , Kenichi Muta , Toyomitsu Yamamoto
IPC分类号： G02B618
CPC分类号： G02B6/03694 , G02B6/0281 , G02B6/03633 , G02B6/266
摘要： An optical attenuator which provides almost the same degree of attenuation even when the difference in wavelength of two different kinds of input optical signals is small. Another optical attenuator is provided with a dopant concentration in a technically realizable range which increases the difference in optical attenuation of two different kinds of input optical signals. Almost the same degree of attenuation may be obtained even when the difference between wavelengths is small by canceling the wavelength dependency of attenuation of the dopant by raising the refractive index of an axially central portion of the core as compared to that of the peripheral portion of the core and by taking into account the type and area of the dopant and the ratio of the difference &Dgr;2 between the refractive indexes of the cladding and the axial portion of the core and the difference &Dgr;1 between the refractive index of the cladding and the refractive index of the peripheral portion, i.e., &Dgr;1/&Dgr;2. On the other hand, the difference of attenuation is increased while suppressing the concentration of dopant to the realizable range.
摘要翻译：即使当两种不同种类的输入光信号的波长差小时，也提供几乎相同衰减程度的光衰减器。另一个光衰减器在技术上可实现的范围内提供掺杂剂浓度，这增加了两种不同种类的输入光信号的光衰减差异。即使当通过提高与芯的周边部分的芯的轴向中心部分的折射率相比较来补偿掺杂剂的衰减的波长依赖性时，即使当波长之间的差异较小时，也可以获得几乎相同的衰减程度并且通过考虑掺杂剂的类型和面积以及包层的折射率与芯的轴向部分之间的差值Delta2与包层的折射率与折射率之间的差值Δ1的比值外围部分，即Delta1 / Delta2。另一方面，在将掺杂剂的浓度抑制到可实现的范围的同时，衰减的差异增加。

9. 发明授权

US06512873B1 Optical body having modifiable light guiding properties 失效
标题翻译：具有可调光引导性能的光学体
公开(公告)号：US06512873B1
公开(公告)日：2003-01-28
申请号：US09647948
申请日：2001-01-31
申请人： Michael Fokine
发明人： Michael Fokine
IPC分类号： G02B618
CPC分类号： G02B6/03694 , C03C25/002 , G02B6/02042 , G02B6/02052 , G02B6/03644 , G02B6/2835 , G02B2006/2839
摘要： In an optical fiber or other light guiding body is utilized that the diffusion properties of fluorine, which reduces the refractive index, are strongly changed, if also a doping with phosphorous is made, to change the refractive index and hereby the light guiding properties. In for example a single mode fiber (1) thus locally an additional waveguide core (9) can be created parallel to the already existing waveguide core (3), by providing in parallel to the ordinary core (3) an activatable region (5) having substantially the sane dimensions as the existing core and having suitable dopings of fluorine and phosphorous. This can be utilized to produce an optical filter element If the optical fiber is D-fiber, a sensor element can be produced. Furthermore, for suitable concentrations of these dopants and of germanium an existing waveguide core can be erased by a heating operation.
摘要翻译：在使用光纤或其他导光体中，如果还进行磷掺杂，则改变折射率，因此导光性能，强烈地改变降低折射率的氟的扩散性能。在例如单模光纤（1）中，通过与普通芯（3）平行地提供可激活区域（5），可以平行于已经存在的波导芯（3）而产生附加的波导芯（9）具有基本上相同的尺寸作为现有的芯并且具有合适的氟和磷的掺杂。这可以用于制造滤光元件。如果光纤是D光纤，则可以制造传感器元件。此外，对于这些掺杂剂和锗的合适浓度，可以通过加热操作来擦除现有的波导芯。

10. 发明授权

US06282354B1 Low attenuation optical waveguide 失效
公开(公告)号：US06282354B1
公开(公告)日：2001-08-28
申请号：US09641019
申请日：2000-08-17
申请人： Peter C. Jones , Daiping Ma , David K. Smith
发明人： Peter C. Jones , Daiping Ma , David K. Smith
IPC分类号： G02B618
CPC分类号： G02B6/03672 , G02B6/02 , G02B6/02009 , G02B6/02238 , G02B6/02242 , G02B6/02276 , G02B6/0285 , G02B6/0286 , G02B6/03611 , G02B6/03627 , G02B6/03633 , G02B6/03644 , G02B6/0365 , G02B6/03694
摘要： Disclosed is a single mode optical waveguide fiber having a core refractive index profile in which the profile parameters are selected to provide an attenuation minimum. A set of profiles having the same general shape and dimensions is shown to have a group of profiles contained in a sub-set which exhibit a minimum of attenuation as compared to the remaining members of the set. The members of the sub-set have been found to have the lowest effective group index, ngeff, and the lowest change in &bgr;2 under waveguide fiber bending.

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