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    Optical transmitter having pre-modulation amplification
    23.
    发明公开
    Optical transmitter having pre-modulation amplification 失效
    Optischer Sender mitVormodulationsverstärkung

    公开(公告)号：EP0877477A2

    公开(公告)日：1998-11-11

    申请号：EP98303325.9

    申请日：1998-04-28

    Applicant: LUCENT TECHNOLOGIES INC.

    Inventor： Walker, Kenneth Lee ,  Willems, Frederick Willem

    IPC: H03F1/32

    CPC classification number: H04B10/505 ,  H03F1/32 ,  H04B10/564

    Abstract: In one embodiment, an optical transmitter (40), which has a modulator (44) disposed between an pair of optical amplifiers (45, 46), exhibits reduced carrier-to-noise ratio and relatively high powers. In another embodiment, an optical amplifier (45) is disposed between the laser carrier source (42) and the modulator (44), but the post-modulator amplifier (46) is omitted. Application of the transmitters to analog systems (e.g., CATV) and digital systems is described.

    Abstract translation: 在一个实施例中，具有设置在一对光放大器（45,46）之间的调制器（44）的光发射器（40）表现出降低的载波噪声比和相对高的功率。 在另一个实施例中，光放大器（45）设置在激光载体源（42）和调制器（44）之间，但后调制放大器（46）被省略。 描述了将发射机应用于模拟系统（例如CATV）和数字系统。

    Article comprising a low noise optical fiber raman amplifier
    24.
    发明公开
    Article comprising a low noise optical fiber raman amplifier 失效
    Vorrichtung mit rauscharmem faseroptischemRamanverstärker

    公开(公告)号：EP0789432A1

    公开(公告)日：1997-08-13

    申请号：EP97300692.7

    申请日：1997-02-04

    Applicant: LUCENT TECHNOLOGIES INC.

    Inventor： Grubb, Stephen Gregory ,  Walker, Kenneth Lee ,  Stentz, Andrew John

    IPC: H01S3/30

    CPC classification number: H04B10/2916 ,  H01S3/06787 ,  H01S3/094003 ,  H01S3/302 ,  H01S2301/02 ,  Y10S372/703

    Abstract: A low noise optical fiber Raman amplifier (FRA) comprises an upstream and a downstream length (23, 24) of silica-based amplifier fiber, of combined length >200 m, typically >1 km, with an optical isolator (25) 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 (26, 27) 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 1.3µm 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.

    Abstract translation: 低噪声光纤拉曼放大器（FRA）包括基于二氧化硅的放大器光纤的上游和下游长度（23,24），其长度大于> 200m，典型地> 1km，光隔离器（25）位于 放大器光纤的上游和下游长度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（26,27）用于分流围绕光隔离器的泵浦辐射。 所描述的FRA有利地结合到光纤通信系统中。 示例性地，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 fiber communication system incorporation automatic dispersion compensation modules to compensate for temperature induced variations
    29.
    发明公开
    Optical fiber communication system incorporation automatic dispersion compensation modules to compensate for temperature induced variations 审中-公开
    安排用于通过与单位为色散的自动补偿光纤通信以补偿由引起的温度变化

    公开(公告)号：EP1073221A1

    公开(公告)日：2001-01-31

    申请号：EP00306078.7

    申请日：2000-07-17

    Applicant: LUCENT TECHNOLOGIES INC.

    Inventor： Eggleton, Benjamin John ,  Strasser, Thomas Andrew ,  Walker, Kenneth Lee ,  Rogers, John A

    IPC: H04B10/18

    CPC classification number: H04B10/2519 ,  H04B2210/252

    Abstract: A high speed optical communication system (≥ 10Gbit/s) is compensated for temperature variation by providing it with one or more automatic dispersion compensation modules (20). Each module (20) has an adjustable dispersion element (30), a data integrity monitor (31) and a feedback network (32) whereby the monitor (31) adjusts the dispersion element (30) 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.

    Abstract translation: 一种高速光通信系统（≥10Gbit / s的）是通过提供其与一个或多个自动色散补偿模块（20），用于温度变化补偿。 每个模块（20）具有可调节的分散元件（30），数据完整性监视器（31）和一个反馈网络（32），由此在监视器（31）中的分散体元件（30）bestimmt以补偿温度变化。 在优选实施例的色散补偿模块包括其中啁啾在光栅通过使沿所述光纤的长度沉积的电流沿分布式薄膜加热器诱导啁啾光纤布拉格光栅。 目前应用确定性的地雷的大小光栅的分散。 数据完整性监视器配置为感应跨mitted数据的完整性，并为控制电流应用到光栅提供电反馈。

    Communication system comprising a low cost optical filter
    30.
    发明公开
    Communication system comprising a low cost optical filter 失效
    传输系统，廉价的光学滤波器

    公开(公告)号：EP0810749A3

    公开(公告)日：2000-12-20

    申请号：EP97303401.0

    申请日：1997-05-19

    Applicant: LUCENT TECHNOLOGIES INC.

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

    IPC: H04B10/158 ,  G02B6/26 ,  G02B6/34 ,  G02B6/16

    CPC classification number: G02B6/03627 ,  G02B6/02 ,  G02B6/03611 ,  G02B6/266 ,  G02B6/29368 ,  G02B6/4246

    Abstract: An optical fiber communication system (40) 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., 1 , and to have relatively high loss (e.g.,> 20dB) at a wavelength λ 2 . The length L will typically be less than 100 m. In one embodiment the optical fiber is a single mode optical fiber at λ 1 (e.g., 1.3µm) that does not have a guided mode at λ 2 (e.g., 1.55µm). In another embodiment the fiber contains a dopant that does substantially not absorb radiation of wavelength λ 1 , but substantially absorbs at λ 2 . In the second embodiment, λ 1 can be greater than λ 2 . Fiber filters according to the invention can be advantageously used in a variety of communication systems, and exemplary systems are disclosed.

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