利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

20 条记录 (耗时 0.029 秒)

    Multi-stage optical fiber amplifier
    1.
    发明授权
    Multi-stage optical fiber amplifier 失效
    多级光纤放大器

    公开(公告)号：US5050949A

    公开(公告)日：1991-09-24

    申请号：US542296

    申请日：1990-06-22

    申请人： David J. DiGiovanni ,  Clinton R. Giles

    发明人： David J. DiGiovanni ,  Clinton R. Giles

    IPC分类号： G02B6/02 ,  G02F1/35 ,  H01S3/06 ,  H01S3/067 ,  H01S3/07 ,  H01S3/094 ,  H01S3/23

    CPC分类号： H01S3/06758 ,  H01S2301/04 ,  H01S3/094003

    摘要： In this invention there is disclosed a multi-stage optical fiber amplifier for providing a new functon, that of gain equalization. The disclosed multi-stage optical fiber amplifier comprises at least two stages of amplification where each stage comprises an amplifying fiber having a different gain spectrum. In one embodiment the two stages, which can be pumped separately, have different dopant compositions to provide each stage with a different gain spectrum. The disclosed multi-stage optical fiber amplifier provides overall gain spectrum equalization of the amplified channels of long haul transmission lines. Typically, gain equalization can adjust the gain of one channel while maintaining the gain of a second channel constant. When used in combination with automatic gain control, the amplifier gain can be equalized dynamically to compensate for random variations in the relative optical power of wavelength-multiplexed signals to prevent system impairment caused by low-power channels.

    Multi-stage optical amplifier
    3.
    发明授权
    Multi-stage optical amplifier 失效
    多级光放大器

    公开(公告)号：US5115338A

    公开(公告)日：1992-05-19

    申请号：US686013

    申请日：1991-04-12

    申请人： David J. DiGiovanni ,  Clinton R. Giles

    发明人： David J. DiGiovanni ,  Clinton R. Giles

    IPC分类号： H01S3/067 ,  H01S3/094

    CPC分类号： H01S3/06758 ,  H01S3/06787 ,  H01S3/094011 ,  H01S3/09408

    摘要： This invention relates to an Erbium-doped fiber amplifier having multiple stages of amplification for providing enhanced performance. More specifically, optical means is located intermediate first and second stages of doped optical amplifying fibers adapted to receive a pump signal at a pump wavelength where the optical means is adapted to modify the net gain characteristics of the multi-stage amplifier. Presently, all known Erbium-doped fiber amplifiers utilize relatively simple single stage amplifiers which support required ancillary optically passive components such as isolators, filters, pump multiplexers, power monitors and the like at either end of the amplifier. This requirement of having the passive optical element at an end of thhe optical amplifier not only lends to relatively stringent design and fabrication tolerances for a high performance optical amplifier, but it restricts the design of the Erbium-doped fiber amplifier to an embodiment which prevents exploitation of the various unique properties of the Erbium-doped fiber amplifier.

    摘要翻译： 本发明涉及具有多级放大的掺铒光纤放大器，用于提供增强的性能。 更具体地说，光学装置位于掺杂光放大光纤的第一和第二级之间，适于在泵波长处接收泵浦信号，其中光学装置适于修改多级放大器的净增益特性。 目前，所有已知的掺铒光纤放大器利用相对简单的单级放大器，其在放大器的任一端支持所需的辅助光无源部件，例如隔离器，滤波器，泵多路复用器，功率监视器等。 在光放大器的末端使无源光学元件的这种要求不仅适用于高性能光放大器的相对严格的设计和制造公差，而且将铒掺杂光纤放大器的设计限制到防止开发的实施例 的铒掺杂光纤放大器的各种独特性质。

    Method of operating concatenated optical amplifiers
    5.
    发明授权
    Method of operating concatenated optical amplifiers 失效
    操作光电放大器的方法

    公开(公告)号：US5117303A

    公开(公告)日：1992-05-26

    申请号：US571958

    申请日：1990-08-23

    申请人： Emmanuel Desurvire ,  Clinton R. Giles

    发明人： Emmanuel Desurvire ,  Clinton R. Giles

    IPC分类号： G02F1/35 ,  H01S3/06 ,  H01S3/067 ,  H01S3/07 ,  H01S3/23 ,  H04B10/17

    CPC分类号： H04B10/2935 ,  H04B10/2912 ,  H01S2301/02 ,  H01S3/06754

    摘要： In a transmission system having concatenated optical amplifiers, gain saturation of the optical amplifiers at any stage is caused by the extraction of power from the amplifier by the ASE and amplification of the signal and of the ASE from previous stages. Three methods of operating transmission systems are classsified as free-running, constant-total power and constant-signal power. Differences in performance of the three systems arise from the propagation of signal power and the buildup of the ASE. It is now disclosed that the buildup of ASE noise in a system of either lumped or distributed concatenated optical amplifers can be limited by operating at least a plurality of the optical amplifers to provide unsaturated gain which is greater than the loss of the system and/or each optical amplifier is operated in its saturated state.

    Laser transmitter
    6.
    发明授权
    Laser transmitter 失效
    激光发射机

    公开(公告)号：US4612671A

    公开(公告)日：1986-09-16

    申请号：US666155

    申请日：1984-10-29

    申请人： Clinton R. Giles

    发明人： Clinton R. Giles

    IPC分类号： H01S5/068 ,  H01S5/0683 ,  H04B10/155 ,  H04B10/564 ,  H01S3/00 ,  H04B9/00

    CPC分类号： H01S5/06835 ,  H04B10/504 ,  H04B10/564 ,  H01S5/06812 ,  H01S5/06832

    摘要： In a fiber optic laser controller for use in digital transmission a digital data stream and a DC bias are applied to the laser. During a monitoring period, the DC bias is stepped from a zero to a peak current. At a first threshold current, lasing occurs in response to digital `1` modulating current but not in response to digital `0` modulating current. At a second higher threshold current lasing occurs in response to both digital `1` and `0`. The threshold currents are identifiable as peaks in the second derivative d.sup.2 L/dI.sup.2 where L is the light output for an applied bias current I. A feedback circuit including a photodiode, D/A and A/D converters and a microprocessor controller are used to maintain the bias current at the second threshold current in spite of changes in the laser characteristics caused by device aging or temperature change.

    摘要翻译： 在用于数字传输的光纤激光器控制器中，将数字数据流和DC偏压应用于激​​光器。 在监控期间，直流偏压从零到峰值电流阶跃。 在第一阈值电流下，响应于数字“1”调制电流发生激光，但不响应于数字“0”调制电流。 在第二个更高的阈值电流激光发生响应于数字“1”和“0”。 阈值电流可识别为二阶导数d2L / dI2中的峰值，其中L是施加的偏置电流I的光输出。包括光电二极管，D / A和A / D转换器和微处理器控制器的反馈电路用于维护 尽管由器件老化或温度变化引起的激光器特性发生变化，但在第二阈值电流下的偏置电流。

    Passive optical network for dense WDM downstream data transmission and upstream data transmission
    8.
    发明授权
    Passive optical network for dense WDM downstream data transmission and upstream data transmission 失效
    无源光网络用于密集WDM下行数据传输和上行数据传输

    公开(公告)号：US5864413A

    公开(公告)日：1999-01-26

    申请号：US603577

    申请日：1996-02-23

    申请人： Robert D. Feldman ,  Clinton R. Giles ,  Thomas H. Wood

    发明人： Robert D. Feldman ,  Clinton R. Giles ,  Thomas H. Wood

    IPC分类号： H04B10/272 ,  H04J14/02

    CPC分类号： H04J14/0282 ,  H04B10/272 ,  H04J14/02 ,  H04J14/0226 ,  H04J14/0246 ,  H04J14/025

    摘要： A passive optical network for the downstream dense wavelength division multiplexing communication of data between a host terminal complex (HTC) and a plurality of optical network units (ONUs), and for the upstream communication of data from the ONUs to the HTC. The network includes a routing device for distributing downstream data signals contained in a common frequency band among a plurality of fiber drop lines for providing a corresponding wavelength to a corresponding ONU. The routing device also combines upstream data signals contained in a frequency band other than the downstream common frequency band, which are input to the routing device on the plurality of fiber drop lines, to a multi-wavelength signal which is provided to the HTC. In a preferred embodiment, the upstream data signals are output by the routing device to a broadcast port.

    摘要翻译： 一种无源光网络，用于在主机终端复合体（HTC）和多个光网络单元（ONU）之间进行下行密集波分复用数据通信，并用于从ONU到HTC的数据的上游通信。 网络包括路由设备，用于分配多个光纤分支线中包含在公共频带中的下行数据信号，以向对应的ONU提供相应的波长。 路由设备还将输入到多个光纤下拉线上的路由设备的下行公共频带以外的频带中包含的上行数据信号组合到提供给HTC的多波长信号。 在优选实施例中，上行数据信号由路由设备输出到广播端口。

    Optical communication by injection-locking to a signal which modulates an optical carrier
    10.
    发明授权
    Optical communication by injection-locking to a signal which modulates an optical carrier 失效
    通过注入锁定到调制光学载体的信号进行光通信

    公开(公告)号：US5073981A

    公开(公告)日：1991-12-17

    申请号：US373670

    申请日：1989-06-28

    申请人： Clinton R. Giles ,  Tingye Li ,  Thomas H. Wood

    发明人： Clinton R. Giles ,  Tingye Li ,  Thomas H. Wood

    IPC分类号： H04B10/17 ,  H04L7/00

    CPC分类号： H04B10/299 ,  H04L7/0075 ,  Y10S359/90

    摘要： An optical communication system is disclosed including an all-optical device whose output modulated optical beam is locked to an input modulated optical beam. In a specific embodiment of the system, the device may be a self-electro-optic effect device (SEED), which is operated as an oscillator by means of an associated tank circuit. Such an embodiment permits recovery of a clock frequency from a bit stream which is input into the device. When the output of the device is directed into an optical decision element, an all-optical regenerator may be realized.

    摘要翻译： 公开了一种光通信系统，其包括其输出调制光束被锁定到输入调制光束的全光学装置。 在该系统的具体实施例中，该装置可以是通过相关联的电路作为振荡器操作的自电光效应装置（SEED）。 这样的实施例允许从输入到设备的比特流恢复时钟频率。 当设备的输出被引导到光学决策元件时，可以实现全光学再生器。