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    Article comprising low noise optical fiber raman amplifier
    2.
    发明授权
    Article comprising low noise optical fiber raman amplifier 失效
    文章包括低噪声光纤拉曼放大器

    公开(公告)号：US5673280A

    公开(公告)日：1997-09-30

    申请号：US600354

    申请日：1996-02-12

    申请人： Stephen Gregory Grubb ,  Andrew John Stentz ,  Kenneth Lee Walker

    发明人： Stephen Gregory Grubb ,  Andrew John Stentz ,  Kenneth Lee Walker

    IPC分类号： G02F1/35 ,  H01S3/067 ,  H01S3/094 ,  H01S3/30 ,  H04B10/17

    CPC分类号： H04B10/2916 ,  H01S3/302 ,  H01S2301/02 ,  H01S3/06787 ,  H01S3/094003 ,  Y10S372/703

    摘要： A low noise optical fiber Raman amplifier (FRA) comprises an upstream and a downstream length of silica-based amplifier fiber, of combined length >200 m, typically >1 km, with an optical isolator disposed between the upstream and downstream lengths of amplifier fiber such that passage of backscattered signal radiation from the latter to the former is substantially blocked. In preferred embodiments counter-propagating pump radiation is coupled into the downstream length of amplifier fiber, and wavelength-selective means are provided for shunting the pump radiation around the optical isolator. The described FRA is advantageously incorporated into optical fiber communication systems. Exemplarily it can serve as power amplifier, as pre-amplifier, or as in-line amplifier. For instance, it can be used to replace conventional opto-electronic repeaters in existing 1.3 .mu.m fiber communication systems, or it can be used as power amplifier in a multi-subscriber optical fiber CATV system. In a still further exemplary embodiment, the FRA is used as a distributed pre-amplifier in a remotely pumped fiber communication system.

    摘要翻译： 低噪声光纤拉曼放大器（FRA）包括上游和下游长度的二氧化硅基放大器光纤，其长度> 200m，通常> 1km，光隔离器设置在放大器光纤的上游和下游之间 使得后向散射信号辐射从后者到前者的通过基本上被阻挡。 在优选实施例中，反向传播的泵浦辐射被耦合到放大器光纤的下游长度中，并且提供波长选择装置用于在光隔离器周围分流泵浦辐射。 所描述的FRA有利地结合到光纤通信系统中。 例如，它可以作为功率放大器，作为前置放大器，或作为在线放大器。 例如，它可以用于替代现有的1.3μm光纤通信系统中的常规光电中继器，或者可以用作多用户光纤CATV系统中的功率放大器。 在又一示例性实施例中，FRA用作远程泵浦光纤通信系统中的分布式前置放大器。

    Optical communication system using multiple-order Raman amplifiers
    4.
    发明授权
    Optical communication system using multiple-order Raman amplifiers 有权
    使用多阶拉曼放大器的光通信系统

    公开(公告)号：US6163636A

    公开(公告)日：2000-12-19

    申请号：US233318

    申请日：1999-01-19

    申请人： Andrew John Stentz ,  Kenneth Lee Walker

    发明人： Andrew John Stentz ,  Kenneth Lee Walker

    IPC分类号： G02F1/35 ,  H01S3/06 ,  H01S3/094 ,  H01S3/30 ,  H04B10/16 ,  H04B10/17 ,  H04J14/00 ,  H04J14/02

    CPC分类号： H04B10/2916 ,  H01S3/094073 ,  H01S3/094096 ,  H01S3/302

    摘要： In accordance with the invention an optical fiber communication system comprising a source of optical signals and an optical fiber transmission line is provided with one or more multiple-order distributed Raman effect amplifiers downstream of the source for amplifying the transmitted signals. As compared with a communication system using conventional first order Raman amplifiers, multiple-order amplifier systems can have reduced noise, longer fiber span lengths and reduced nonlinearities. In a preferred embodiment the system uses signal wavelengths in the range 1530-1570 nm, first order Raman pumping at 1430-1475 nm and second order pumping at about 1345 nm. Advantageously, the second order pump light is copropagating with the signal light and the first order pump is counterpropagating with the signal.

    摘要翻译： 根据本发明，包括光信号源和光纤传输线的光纤通信系统在源的下游设置有一个或多个多级分布拉曼效应放大器，用于放大发射信号。 与使用常规一阶拉曼放大器的通信系统相比，多级放大器系统可以具有降低的噪声，更长的光纤跨距长度和降低的非线性。 在优选实施例中，系统使用1530-1570nm范围内的信号波长，1430-1475nm处的一阶拉曼泵浦和在约1345nm处的二阶泵浦。 有利地，二阶泵浦光与信号光共同传播，并且一阶泵与信号相反地传播。

    Multiple fiber laser pump sources
    7.
    发明授权
    Multiple fiber laser pump sources 失效
    多光纤激光泵源

    公开(公告)号：US5933438A

    公开(公告)日：1999-08-03

    申请号：US910948

    申请日：1997-08-08

    申请人： Stephen Gregory Grubb ,  Daryl Inniss ,  Kenneth Lee Walker

    发明人： Stephen Gregory Grubb ,  Daryl Inniss ,  Kenneth Lee Walker

    IPC分类号： H01S3/067 ,  H01S3/094 ,  H01S3/23 ,  H01S3/30

    CPC分类号： H01S3/0675 ,  H01S3/094003 ,  H01S3/09408 ,  H01S3/2383

    摘要： An optical fiber amplifier is pumped by a pair of pump lasers which have at least partially overlapping resonators. In one embodiment, the fiber gain section of the amplifier is located external to the resonators. In another embodiment, the coupler, which couples the pump lasers to the gain section, is located at least partially within said resonators. In a preferred embodiment the resonators are provided with polarization selection properties, and the outputs of the pump lasers are coherent.

    摘要翻译： 光纤放大器由一对具有至少部分重叠的谐振器的泵激光器泵浦。 在一个实施例中，放大器的光纤增益部分位于谐振器的外部。 在另一个实施例中，将泵浦激光器耦合到增益部分的耦合器至少部分地位于所述谐振器内。 在优选实施例中，谐振器具有偏振选择特性，并且泵浦激光器的输出是相干的。

    Optical fiber communication system incorporating automatic dispersion compensation modules to compensate for temperature induced variations
    8.
    发明授权
    Optical fiber communication system incorporating automatic dispersion compensation modules to compensate for temperature induced variations 有权
    包含自动色散补偿模块的光纤通信系统，以补偿温度变化

    公开(公告)号：US06307988B1

    公开(公告)日：2001-10-23

    申请号：US09362151

    申请日：1999-07-28

    申请人： Benjamin John Eggleton ,  John A. Rogers ,  Thomas Andrew Strasser ,  Kenneth Lee Walker

    发明人： Benjamin John Eggleton ,  John A. Rogers ,  Thomas Andrew Strasser ,  Kenneth Lee Walker

    IPC分类号： G02B634

    CPC分类号： H04B10/2519 ,  H04B2210/252

    摘要： A high speed optical communication system (≧10 Gbit/s) is compensated for temperature variation by providing it with one or more automatic dispersion compensation modules. Each module has an adjustable dispersion element, a data integrity monitor and a feedback network whereby the monitor adjusts the dispersion element to compensate for temperature variation. In a preferred embodiment the dispersion compensating modules comprise chirped fiber Bragg gratings in which the chirp is induced in the grating by passing a current along distributed thin film heaters deposited along the length of the fiber. The magnitude of the applied current determines the dispersion of the grating. A data integrity monitor is configured to sense the integrity of transmitted data and to provide electrical feedback for controlling the current applied to the grating.

    摘要翻译： 高速光通信系统（> = 10 Gbit / s）通过提供一个或多个自动色散补偿模块来补偿温度变化。 每个模块具有可调色散元件，数据完整性监视器和反馈网络，由此监视器调节色散元件以补偿温度变化。 在优选实施例中，色散补偿模块包括啁啾光纤布拉格光栅，其中通过沿沿着光纤长度沉积的分布式薄膜加热器传递电流而在光栅中感应啁啾。 施加电流的大小决定了光栅的色散。 数据完整性监视器被配置为感测传输数据的完整性，并提供用于控制施加到光栅的电流的电反馈。

    Magnetically controlled variable optical attenuator
    9.
    发明授权
    Magnetically controlled variable optical attenuator 失效
    磁控可变光衰减器

    公开(公告)号：US6085016A

    公开(公告)日：2000-07-04

    申请号：US97549

    申请日：1998-06-15

    申请人： Rolando Patricio Espindola ,  Sungho Jin ,  Hareesh Mavoori ,  Kenneth Lee Walker

    发明人： Rolando Patricio Espindola ,  Sungho Jin ,  Hareesh Mavoori ,  Kenneth Lee Walker

    IPC分类号： G02B6/26 ,  G02B6/00

    CPC分类号： G02B6/266

    摘要： Magnets are used to control the amount of coupling loss between fibers. The fiber ends are attached to magnets and by controllably magnetizing the magnets, the fibers can be pulled apart or brought closer together to vary the amount of coupling loss. Preferably at least one of the magnets is latchable. The advantage of the latchable version is that a predetermined amount of loss can be latchably set by magnetizing the magnets to a particular level and afterwards no additional power is required to maintain the amount of attenuation. This is advantageous compared to other approaches in which power is required continuously to maintain a particular loss level.

    摘要翻译： 磁铁用于控制纤维之间的耦合损耗。 光纤端部附着在磁体上，并通过可控制地磁化磁体，可以将光纤拉开或靠近在一起以改变耦合损耗。 优选地，至少一个磁体是可锁定的。 可锁定版本的优点是可以通过将磁体磁化到特定水平来锁定预定量的损耗，然后不需要额外的功率来保持衰减量。 与其中需要连续维持功率以维持特定损耗水平的其它方法相比，这是有利的。

    Communication system comprising a low cost optical filter
    10.
    发明授权
    Communication system comprising a low cost optical filter 失效
    包括低成本光学滤波器的通信系统

    公开(公告)号：US5673342A

    公开(公告)日：1997-09-30

    申请号：US654499

    申请日：1996-05-28

    申请人： Katherine Theresa Nelson ,  William Alfred Reed ,  Kenneth Lee Walker ,  Ian Arthur White

    发明人： Katherine Theresa Nelson ,  William Alfred Reed ,  Kenneth Lee Walker ,  Ian Arthur White

    IPC分类号： G02B6/036 ,  G02B6/00 ,  G02B6/02 ,  G02B6/26 ,  G02B6/293 ,  G02B6/34 ,  G02B6/42 ,  H04B10/00 ,  H04B10/08 ,  H04B10/22 ,  H04B10/24

    CPC分类号： G02B6/03627 ,  G02B6/02 ,  G02B6/266 ,  G02B6/03611 ,  G02B6/29368 ,  G02B6/4246

    摘要： An optical fiber communication system according to the invention comprises an optical fiber filter that can be manufactured at low cost and that can be conveniently incorporated into the system, substantially like a conventional fiber jumper. The filter comprises a length L of axially uniform optical fiber selected to have substantially no loss (e.g., 20 dB) at a wavelength .lambda..sub.2. The length L will typically be less than 100 m. In one embodiment the optical fiber is a single mode optical fiber at .lambda..sub.1 (e.g., 1.3 .mu.m) that does not have a guided mode at .lambda..sub.2 (e.g., 1.55 .mu.m). In another embodiment the fiber contains a dopant that does substantially not absorb radiation of wavelength .lambda..sub.1, but substantially absorbs at .lambda..sub.2. In the second embodiment, .lambda..sub.1 can be greater than .lambda..sub.2. Fiber filters according to the invention can be advantageously used in a variety of communication systems, and exemplary systems are disclosed.

    摘要翻译： 根据本发明的光纤通信系统包括可以以低成本制造并且可以方便地并入系统中的光纤滤波器，基本上像传统的光纤跳线一样。 滤波器包括长度为L的轴向均匀的光纤，其被选择为在波长λ1处基本上没有损耗（例如，<1dB），并且在波长λ2处具有相对高的损耗（例如，> 20dB）。 长度L通常将小于100米。 在一个实施例中，光纤是在λ1（例如，1.55μm）处不具有引导模式的λ1（例如，1.3μm）的单模光纤。 在另一个实施方案中，纤维包含基本上不吸收波长λ1的辐射但基本上以λ2吸收的掺杂剂。在第二实施方案中，λ1可以大于λ2.根据本发明的纤维过滤器可以有利地使用 在各种通信系统中，公开了示例性系统。