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    Large effective area optical fibers
    41.
    发明授权
    Large effective area optical fibers 有权
    大面积有效面积的光纤

    公开(公告)号：US08670643B2

    公开(公告)日：2014-03-11

    申请号：US13448646

    申请日：2012-04-17

    申请人： Ming-Jun Li

    发明人： Ming-Jun Li

    IPC分类号： G02B6/028 ,  G02B6/036

    CPC分类号： G02B6/0288 ,  G02B6/02019 ,  G02B6/03627 ,  G02B6/0365

    摘要： Large effective area optical fibers are disclosed. In one embodiment, an optical fiber includes a glass core and a glass cladding surrounding and in direct contact with the glass core. The glass core may include a radius Rc from about 12 μm to about 50 μm; a graded refractive index profile with an alpha value greater than or equal to about 1.0 and less than about 10 at a wavelength of 1550 nm; and a maximum relative refractive index ΔcMAX% from about 0.2% to about 0.75% relative to the glass cladding. An effective area of the core may be greater than or equal to about 150 μm2 such that the core supports the propagation and transmission of an optical signal with X modes at a wavelength of 1550 nm, wherein X is an integer greater than 1 and less than or equal to 110. The glass cladding may include a maximum relative refractive index Δc1MAX% such that ΔcMAX%>Δc1MAX%. The optical fiber has an RMS pulse broadening of less than or equal to about 0.15 ns/km at a wavelength of 1550 nm.

    摘要翻译： 公开了大面积有效面积的光纤。 在一个实施例中，光纤包括围绕玻璃芯和与玻璃芯直接接触的玻璃外壳。 玻璃芯可包括约12μm至约50μm的半径R c; 在1550nm的波长处具有大于或等于约1.0且小于约10的α值的渐变折射率分布; 并且相对于玻璃包层的最大相对折射率DeltacMAX％为约0.2％至约0.75％。 芯的有效面积可以大于或等于约150μm2，使得芯支持在1550nm的波长下具有X模的光信号的传播和传输，其中X是大于1且小于 或等于110.玻璃包层可以包括最大相对折射率Deltac1MAX％，使得DeltacMAX％> Deltac1MAX％。 该光纤在1550nm的波长下具有小于或等于约0.15ns / km的RMS脉冲加宽。

    Low bend loss optical fiber
    42.
    发明授权
    Low bend loss optical fiber 有权
    低弯曲损耗光纤

    公开(公告)号：US08588569B2

    公开(公告)日：2013-11-19

    申请号：US13485028

    申请日：2012-05-31

    申请人： Dana Craig Bookbinder ,  Ming-Jun Li ,  Pushkar Tandon

    发明人： Dana Craig Bookbinder ,  Ming-Jun Li ,  Pushkar Tandon

    IPC分类号： G02B6/028

    CPC分类号： G02B6/028 ,  G02B6/0286 ,  G02B6/03627 ,  G02B6/03638 ,  G02B6/0365

    摘要： One embodiment of a single mode optical fiber includes: a graded index central core region having outer radius r1 and refractive index Δ1; a cladding region comprising (i) a first inner cladding region having an outer radius r2 10 microns and comprising a minimum refractive index Δ3, wherein said second cladding region has at least one region with a refractive index delta that becomes more negative with increasing radius; and (iii) an outer cladding region surrounding the inner cladding region and comprising refractive index Δ4, wherein Δ1>Δ2>Δ3, Δ3

    摘要翻译： 单模光纤的一个实施例包括：具有外半径r1和折射率Delta1的渐变折射率中心纤芯区域; 包层区域，包括（i）具有外半径r2 <10微米和折射率Delta2和0.65 @ r1 / r2 @ 1的第一内包层区域; （ii）和具有外半径r3> 10微米并且包括最小折射率Delta3的第二内包层区域，其中所述第二包层区域具有至少一个具有随着半径增加而变得更负的折射率δ的区域; 和（iii）围绕内包层区域并包括折射率Delta4的外包层区域，其中Delta1> Delta2> Delta3，Delta3Δ4。

    Low bend loss optical fiber
    43.
    发明授权
    Low bend loss optical fiber 有权
    低弯曲损耗光纤

    公开(公告)号：US08542969B2

    公开(公告)日：2013-09-24

    申请号：US13030308

    申请日：2011-02-18

    申请人： Dana Craig Bookbinder ,  Ming-Jun Li ,  Pushkar Tandon

    发明人： Dana Craig Bookbinder ,  Ming-Jun Li ,  Pushkar Tandon

    IPC分类号： G02B6/02

    CPC分类号： G02B6/03627 ,  G02B6/02014 ,  G02B6/02242 ,  G02B6/02266

    摘要： An optical fiber having both low macrobend loss and low microbend loss. The fiber has a first inner cladding region having an outer radius r2>8 microns and refractive index Δ2 and a second outer cladding region surrounding the inner cladding region having refractive index Δ3, wherein Δ1>Δ3>Δ2. The difference between Δ3 and Δ2 is greater than 0.01. The fiber exhibits a 22 m cable cutoff less than or equal to 1260 nm, and r1/r2 is greater or equal to 0.25.

    摘要翻译： 具有低弯曲损耗和低微弯损耗的光纤。 纤维具有外半径r2> 8微米和折射率Delta2的第一内包层区域和围绕具有折射率Delta3的内包层区域的第二外包层区域，其中Delta1> Delta3>Δ2。 Delta3和Delta2之间的差值大于0.01。 纤维表现出小于或等于1260nm的22m电缆断线，r1 / r2大于或等于0.25。

    OPTICAL BRILLOUIN SENSING SYSTEMS
    44.
    发明申请
    OPTICAL BRILLOUIN SENSING SYSTEMS 审中-公开
    光学感光系统

    公开(公告)号：US20130229649A1

    公开(公告)日：2013-09-05

    申请号：US13409310

    申请日：2012-03-01

    申请人： Ming-Jun Li ,  Shenping Li ,  Richard Stephen Vodhanel

    发明人： Ming-Jun Li ,  Shenping Li ,  Richard Stephen Vodhanel

    IPC分类号： G01N21/49 ,  G01N21/17

    CPC分类号： G01M5/0091 ,  G01D5/35364 ,  G01K11/32

    摘要： According to one embodiment, an optical sensing system may include a gated optical amplifier, one or more triggering devices, and an optical coupler. The gated optical amplifier can receive a pulse signal and transform the pulse signal into an amplified pulse signal having an amplified peak portion. The triggering devices can control the gated optical amplifier such that the gated optical amplifier is in the lossy state while the baseline portion of the pulse signal is transformed and the gated optical amplifier is in the gain state while the peak portion of the pulse signal is transformed. The amplified pulse signal can be transmitted to the sensing optical fiber and a sensed optical signal can be received, when the sensing optical fiber is connected to the optical coupler. Optionally, a second pulse signal and the sensed optical signal can be combined and detected with a coherent balanced detection technique.

    摘要翻译： 根据一个实施例，光学感测系统可以包括门控光放大器，一个或多个触发装置和光耦合器。 门控光放大器可以接收脉冲信号并将脉冲信号转换成具有放大峰值部分的放大脉冲信号。 触发装置可以控制门控光放大器，使得门控光放大器处于损耗状态，而脉冲信号的基线部分被变换，并且门控光放大器处于增益状态，同时脉冲信号的峰值部分被变换 。 当感测光纤连接到光耦合器时，放大的脉冲信号可以传输到感测光纤并且可以接收感测的光信号。 可选地，可以用相干平衡检测技术组合并检测第二脉冲信号和感测到的光信号。

    Bend insensitive optical fibers with low refractive index glass rings
    45.
    发明授权
    Bend insensitive optical fibers with low refractive index glass rings 有权
    具有低折射率玻璃环的弯曲不敏感光纤

    公开(公告)号：US08428415B2

    公开(公告)日：2013-04-23

    申请号：US12351221

    申请日：2009-01-09

    申请人： Xin Chen ,  Ming-Jun Li ,  Anping Liu

    发明人： Xin Chen ,  Ming-Jun Li ,  Anping Liu

    IPC分类号： G02B6/036

    CPC分类号： G02B6/0365 ,  G02B6/03605 ,  G02B6/03633 ,  Y10T428/2962

    摘要： An optical fiber includes a silica-based glass portion having an outer diameter of less than about 120 μm. The glass portion comprises a core, an inner cladding and a low index ring. The core comprises an index of refraction n1, and a relative refractive index percent Δ1% relative to pure silica glass. The inner cladding surrounds the core and comprises an index of refraction n2, a radial thickness of less than about 40 μm and a relative refractive index percent Δ2% relative to pure silica glass, wherein Δ1%>Δ2% and the difference between Δ1% and Δ2% is greater than 0.1%. The low index ring surrounds the inner cladding and comprises boron and fluorine, a radial thickness of less than about 20 μm, an index of refraction n3 and a third relative refractive index percent Δ3% relative to pure silica glass, wherein Δ2%>Δ3% and Δ3% is less than −0.5%.

    摘要翻译： 光纤包括外径小于约120μm的二氧化硅基玻璃部分。 玻璃部分包括芯，内包层和低折射率环。 芯包括折射率n1，相对于纯石英玻璃的相对折射率百分比Δ1％。 内部包层围绕芯部并且包括折射率n2，小于约40μm的径向厚度和相对于纯石英玻璃的相对折射率百分比Δ2％，其中Delta1％> Delta2％，Delta1％和 Delta2％大于0.1％。 低折射率环围绕内包层并且包括硼和氟，相对于纯二氧化硅玻璃的径向厚度小于约20μm，折射率n3和第三相对折射率百分比Δ3％，其中Delta2％> Delta3％ 而Delta3％小于-0.5％。

    FEW MODE OPTICAL FIBERS FOR MODE DIVISION MULTIPLEXING
    47.
    发明申请
    FEW MODE OPTICAL FIBERS FOR MODE DIVISION MULTIPLEXING 有权
    用于模式分割多路复用的模式光纤

    公开(公告)号：US20130071114A1

    公开(公告)日：2013-03-21

    申请号：US13420037

    申请日：2012-03-14

    申请人： Scott Robertson Bickham ,  Ming-Jun Li ,  Daniel Aloysius Nolan ,  Ji Wang

    发明人： Scott Robertson Bickham ,  Ming-Jun Li ,  Daniel Aloysius Nolan ,  Ji Wang

    IPC分类号： G02B6/028 ,  H04J14/04

    CPC分类号： G02B6/0288 ,  G02B6/02019 ,  G02B6/02023 ,  G02B6/03627 ,  G02B6/0365 ,  H04J14/04

    摘要： A few mode optical fiber suitable for use in a mode division multiplexing (MDM) optical transmission system is disclosed. The optical fiber has a graded-index core with a radius R1 in the range from 8 μm to 14 μm, an alpha value greater than or equal to about 2.3 and less than about 2.7 at a wavelength of 1550 nm, and a maximum relative refractive index Δ1MAX from about 0.3% to about 0.6% relative to the cladding. The optical fiber also has an effective area greater than about 90 μm2 and less than about 160 μm2. The core and cladding support only the LP01 and LP11 modes at wavelengths greater than 1500 nm. The cladding has a maximum relative refractive index Δ4MAX such that Δ1MAX>Δ4MAX, and the differential group delay between the LP01 and LP11 modes is less than about 0.5 ns/km at a wavelength of 1550 nm.

    摘要翻译： 公开了适用于模分多路复用（MDM）光传输系统的几种模式光纤。 光纤具有半径R1在8μm至14μm范围内的梯度折射率芯，在1550nm波长处大于或等于约2.3且小于约2.7的α值，以及最大相对折射率 指数＆Dgr; 1MAX，相对于包层为约0.3％至约0.6％。 该光纤还具有大于约90μm2且小于约160μm2的有效面积。 芯和包层只支持波长大于1500 nm的LP01和LP11模式。 包层具有最大相对折射率＆Dgr; 4MAX，使得＆Dgr; 1MAX>＆Dgr; 4MAX，并且LP01和LP11模式之间的差分群延迟在1550nm的波长处小于约0.5ns / km。

    METHOD FOR PRODUCING OPTICAL FIBER HAVING CONTROLLED PERTURBATIONS
    48.
    发明申请
    METHOD FOR PRODUCING OPTICAL FIBER HAVING CONTROLLED PERTURBATIONS 有权
    用于生产具有控制性刺激的光纤的方法

    公开(公告)号：US20130047676A1

    公开(公告)日：2013-02-28

    申请号：US13587091

    申请日：2012-08-16

    申请人： Xin Chen ,  Charles Frederick Laing ,  Ming-Jun Li ,  Anping Liu ,  Eric John Mozdy ,  Joseph Doull Thaler

    发明人： Xin Chen ,  Charles Frederick Laing ,  Ming-Jun Li ,  Anping Liu ,  Eric John Mozdy ,  Joseph Doull Thaler

    IPC分类号： C03B37/025

    CPC分类号： C03B37/02745 ,  C03B37/02763 ,  C03B2203/06 ,  C03B2203/18 ,  C03B2203/20 ,  Y02P40/57

    摘要： A method for producing an optical fiber is provided. The method includes the steps of drawing an optical fiber from a heated glass source in a furnace and introducing index perturbations to the optical fiber via a plurality of perturbation sources arranged at a plurality of different azimuthal locations. The index perturbations are introduced synchronously at different locations along the axial length of the fiber by the plurality of perturbation sources in a generally helical pattern on the outside surface of the fiber in one embodiment. According to another embodiment, the index perturbations are introduced by the plurality of perturbation sources at different frequencies.

    摘要翻译： 提供一种光纤的制造方法。 该方法包括以下步骤：在炉中从加热的玻璃源中拉出光纤，并且通过布置在多个不同方位位置处的多个扰动源将折射率扰动引入光纤。 在一个实施例中，通过多个扰动源以纤维的外表面上的大致螺旋图案沿着纤维的轴向长度在不同位置同时引入折射率扰动。 根据另一实施例，索引扰动由多个扰动源以不同的频率引入。