Optical fiber for soliton transmission and method of making
    2.
    发明授权
    Optical fiber for soliton transmission and method of making 失效
    用于孤子传输的光纤和制造方法

    公开(公告)号:US5504829A

    公开(公告)日:1996-04-02

    申请号:US172937

    申请日:1993-12-27

    摘要: A single-mode optical fiber suitable for the transmission of solitons has a refractive index profile that changes along the length of the fiber to provide a fiber dispersion that monotonically decreases along the fiber from one end thereof to the other. The fiber includes a core of maximum refractive index n.sub.1 and a radius a, surrounded by cladding material having a refractive index n.sub.2 which is less than n.sub.1. The fiber core includes a central region that extends to the longitudinal axis of the fiber and an outer region, the inner and outer regions being separated by a region of depressed refractive index. The inner radius a.sub.1 of the region of depressed refractive index is greater than zero and the maximum radius a.sub.o of the region of depressed refractive index is less than a. The fiber preform can be made by depositing layers of glass particles on an elongated mandrel, the composition of glass particles being varied with respect to longitudinal position along the preform during the deposition of some of the layers.

    摘要翻译: 适于透射孤子的单模光纤具有沿纤维长度变化的折射率分布,以提供沿纤维从其一端到另一端单调减小的纤维分散体。 光纤包括最大折射率n1的核心和半径a,由具有小于n1的折射率n2的包层材料包围。 纤维芯包括延伸到纤维的纵向轴线的中心区域和外部区域,内部和外部区域被折射率低的区域分开。 折射率低的区域的内半径a1大于零,折射率低的区域的最大半径ao小于a。 纤维预成型件可以通过在细长心轴上沉积玻璃颗粒层而制成,玻璃颗粒的组成在沉积一些层期间相对于沿着预成型件的纵向位置而变化。

    Method of making an optical fiber with an axially decreasing group
velocity dispersion
    3.
    发明授权
    Method of making an optical fiber with an axially decreasing group velocity dispersion 失效
    制造具有轴向减小组速度色散的光纤的方法

    公开(公告)号:US5925163A

    公开(公告)日:1999-07-20

    申请号:US767236

    申请日:1996-12-13

    摘要: An optical fiber preform is made by supplying the base glass reactant and the dopant glass reactant to a burner that generates a flame in which a stream of glass particles is produced. The burner moves with respect to a rotating mandrel to deposit layers of glass particles on the mandrel. During the deposition of a portion of the preform, the flow rate of the dopant glass reactant is varied in accordance with a first recipe of dopant flow as a function of burner position as the burner moves longitudinally along the substrate to form one of the layers. The flow rate of the dopant glass reactant varies in accordance with a second recipe of dopant flow as a function of burner position as the burner moves longitudinally along the substrate to form a layer adjacent to the one layer. The second recipe is different from the first recipe, and the flow rate of the dopant glass reactant changes during the step of moving the reaction zone to form the one layer.

    摘要翻译: 通过将基础玻璃反应物和掺杂剂玻璃反应剂供应到产生其中产生玻璃颗粒流的火焰的燃烧器来制造光纤预制件。 燃烧器相对于旋转心轴移动以在心轴上沉积玻璃颗粒层。 在预成型件的一部分的沉积期间,随着燃烧器沿着衬底纵向移动以形成层之一,掺杂剂玻璃反应物的流速根据作为燃烧器位置的函数的掺杂剂流的第一配方而变化。 随着燃烧器沿着衬底纵向移动以形成与该层相邻的层,掺杂剂玻璃反应物的流速根据作为燃烧器位置的函数的掺杂剂流的第二配方而变化。 第二配方不同于第一配方,并且掺杂剂玻璃反应物的流速在移动反应区的步骤中变化以形成一层。

    Gain control in Raman amplifiers
    5.
    发明授权
    Gain control in Raman amplifiers 有权
    拉曼放大器的增益控制

    公开(公告)号:US06724524B1

    公开(公告)日:2004-04-20

    申请号:US09641579

    申请日:2000-08-18

    IPC分类号: H01S330

    摘要: A Raman fiber amplifier includes: a transmission fiber; at least one optical pump providing optical pump power to the transmission fiber; and at least one pump power detector; at least one signal detector detecting signal power propagating through the transmission fiber. The Raman fiber amplifier also includes a controller that adjusts the pump power provided by the pump to adjust, gain, or signal power provided by this Raman fiber amplifier.

    摘要翻译: 拉曼光纤放大器包括:传输光纤; 至少一个光泵向所述传输光纤提供光泵功率; 和至少一个泵功率检测器; 至少一个信号检测器检测通过传输光纤传播的信号功率。 拉曼光纤放大器还包括一个控制器,调节由泵提供的泵浦功率,以调节,增益或由该拉曼光纤放大器提供的信号功率。

    Amplifier system with a discrete Raman fiber amplifier module
    6.
    发明授权
    Amplifier system with a discrete Raman fiber amplifier module 有权
    放大器系统采用离散拉曼光纤放大器模块

    公开(公告)号:US06310716B1

    公开(公告)日:2001-10-30

    申请号:US09641578

    申请日:2000-08-18

    IPC分类号: H01S307

    摘要: An amplifier system includes: (i) a distributed Raman fiber amplifier adapted to amplify C and L-band signals and; (ii) a discrete Raman fiber amplifier module that includes a C-band amplification stage and an L-band amplification stage. The discrete Raman fiber amplifier module is operatively connected to the distributed Raman fiber amplifier and amplifies signals received from the distributed Raman fiber amplifier. In one embodiment the distributed Raman fiber amplifier and the discrete Raman fiber amplifier share optical pump power provided by the shared pump.

    摘要翻译: 放大器系统包括:(i)适于放大C和L波段信号的分布式拉曼光纤放大器;(ii)包括C波段放大级和L波段放大级的分立拉曼光纤放大器模块。 离散拉曼光纤放大器模块可操作地连接到分布式拉曼光纤放大器,并放大从分布式拉曼光纤放大器接收的信号。 在一个实施例中,分布式拉曼光纤放大器和离散拉曼光纤放大器共享由共享泵提供的光泵功率。

    Raman amplifiers with improved signal power management
    7.
    发明授权
    Raman amplifiers with improved signal power management 有权
    具有改进的信号功率管理的拉曼放大器

    公开(公告)号:US06862135B2

    公开(公告)日:2005-03-01

    申请号:US10178799

    申请日:2002-06-24

    摘要: An optical link comprises a first optical amplifier having a first gain spectrum with a first gain ripple and a second optical amplifier having a second gain spectrum with a second gain ripple. A combined gain spectrum of the first and second gain spectra is substantially flat and has a gain ripple that is substantially less than either the first gain ripple or the second gain ripple over a particular wavelength range.

    摘要翻译: 光学链路包括具有第一增益波动的第一增益谱和具有第二增益波动的第二增益谱的第二光放大器的第一光放大器。 第一和第二增益光谱的组合增益谱基本上是平坦的,并且具有明显小于特定波长范围上的第一增益波动或第二增益波动的增益波动。

    Nonlinear optical loop mirror device including dispersion decreasing
fiber
    8.
    发明授权
    Nonlinear optical loop mirror device including dispersion decreasing fiber 失效
    包括色散减少光纤的非线性光环路镜装置

    公开(公告)号:US5655039A

    公开(公告)日:1997-08-05

    申请号:US577135

    申请日:1995-12-22

    申请人: Alan F. Evans

    发明人: Alan F. Evans

    CPC分类号: G02F1/3519

    摘要: A nonlinear optical loop mirror device having a distributed directional asymmetry. A dispersion decreasing optical fiber is formed into a loop by an optical coupler which divides input pulses into two component pulses that propagate around the loop in opposite directions, and which transmits and/or reflects returning component pulses in accordance with their relative phases. The parameters of the loop, such as its length, effective area, rate of change of dispersion, etc. are selected so that input pulses may be switched or transmitted in accordance with whether their widths or amplitudes are above or below predetermined threshold values.

    摘要翻译: 一种具有分布式方向不对称性的非线性光学环路镜装置。 通过光耦合器将色散减小的光纤形成为环路,该光耦合器将输入脉冲分成在相反方向上绕环路传播的两个分量脉冲,并且根据其相对相位传输和/或反射返回分量脉冲。 选择循环的参数,例如其长度,有效面积,色散变化率等,使得可以根据其宽度或幅度是高于还是低于预定阈值来切换或传输输入脉冲。

    Solitons in dispersion flattened waveguide
    9.
    发明授权
    Solitons in dispersion flattened waveguide 失效
    分散平坦波导中的孤子

    公开(公告)号:US5579428A

    公开(公告)日:1996-11-26

    申请号:US482716

    申请日:1995-06-07

    CPC分类号: G02B6/02238 G02B6/03644

    摘要: A combination of dispersion flattened single mode optical waveguide fiber and soliton signal pulses yields an optimum telecommunication system capacity. The dispersion flattened fiber serves to relax tolerances on soliton center wavelength and intensity. In addition, the inventive combination facilitates the design and use of long haul systems using optical amplifiers.

    摘要翻译: 色散平坦单模光纤和孤子信号脉冲的组合产生最佳的电信系统容量。 分散平坦纤维用于放松孤子中心波长和强度的公差。 此外,本发明的组合有助于使用光放大器的长距离系统的设计和使用。

    Amplifier system with distributed and discrete Raman fiber amplifiers
    10.
    发明授权
    Amplifier system with distributed and discrete Raman fiber amplifiers 有权
    具有分布式和离散拉曼光纤放大器的放大器系统

    公开(公告)号:US06657774B1

    公开(公告)日:2003-12-02

    申请号:US09641577

    申请日:2000-08-18

    IPC分类号: G02B626

    CPC分类号: H04B10/2916

    摘要: An amplifier system includes: (i) a distributed Raman fiber amplifier and; (ii) a discrete Raman fiber amplifier that includes dispersion compensated fiber. The discrete Raman fiber amplifier is operatively connected to the distributed Raman fiber amplifier and amplifies signals received from the distributed Raman fiber amplifier. In one embodiment, at least one source of pump signal is coupled to the distributed and to the discrete Raman fiber amplifier. The distributed Raman fiber amplifier and the discrete Raman fiber amplifier in this embodiment share optical pump power provided by the shared pump. In one embodiment of the present invention an Erbium doped fiber amplifier (EDFA) is operatively connected to a discrete Raman fiber amplifier and the Erbium dope fiber amplifier amplifies signals received from the discrete Raman fiber amplifier.

    摘要翻译: 放大器系统包括:(i)分布式拉曼光纤放大器; (ii)包括色散补偿光纤的离散拉曼光纤放大器。 离散拉曼光纤放大器可操作地连接到分布式拉曼光纤放大器,并放大从分布式拉曼光纤放大器接收的信号。 在一个实施例中,至少一个泵浦信号源耦合到分布式和离散的拉曼光纤放大器。 本实施例中的分布式拉曼光纤放大器和离散拉曼光纤放大器共享由共享泵提供的光泵浦功率。 在本发明的一个实施例中,掺铒光纤放大器(EDFA)可操作地连接到离散拉曼光纤放大器,铒掺杂光纤放大器放大从离散拉曼光纤放大器接收的信号。