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    Optical system with tunable in-fiber gratings
    1.
    发明授权
    Optical system with tunable in-fiber gratings 失效
    具有可调谐光纤光栅的光学系统

    公开(公告)号：US5579143A

    公开(公告)日：1996-11-26

    申请号：US71263

    申请日：1993-06-04

    Applicant: David R. Huber

    Inventor： David R. Huber

    IPC: G02B6/34 ,  H01S3/10 ,  H04B10/17 ,  H04B10/207 ,  H04H20/69 ,  H04J14/02 ,  H04N7/10 ,  H04N7/22 ,  H04N21/81

    CPC classification number: H04H20/69 ,  G02B6/2932 ,  H01S3/10023 ,  H04B10/2941 ,  H04J14/02 ,  H04J14/0206 ,  H04J14/021 ,  H04J14/0213 ,  H04J14/0234 ,  H04J14/0238 ,  H04J14/0252 ,  H04J14/028 ,  H04J14/0282 ,  H04J14/0286 ,  H04J14/0298 ,  H04N21/812 ,  H04N7/10 ,  H04N7/108 ,  H04N7/22 ,  G02B6/2935 ,  H04J14/0201 ,  H04J14/0204 ,  H04J14/0226

    Abstract: An optical cable television system provides a large channel capacity and uses shared resources, whereby the more expensive hardware is shared over a large number of customers so as to minimize the cost per customer. A video switch network is provided which minimizes the temptation of subscribers to pirate signals since pay per view or on demand signals are provided only upon request of someone within a node corresponding to a neighborhood. An on demand program center continuously plays programs, such as movies, at time-staggered starts such that any subscriber will have only Very minimal delays before seeing a particular program which is requested. A tuneable optical filter is provided in order to switch video signals onto an optical fiber going to the node in a particular neighborhood. An arrangement uses in-fiber grating in order to remove and insert different optical frequencies. Local insertion of various program sources, such as local commercials, is accomplished effectively by making such insertion at a relatively high point in the video distribution chain. An interface arrangement to provide on demand video signals to telephone company twisted pair wires is utilized.

    Abstract translation: 光缆电视系统提供大的信道容量并且使用共享资源，由此在大量客户上共享更昂贵的硬件，以便最小化每个客户的成本。 提供一种视频切换网络，其最小化用户对盗版信号的诱惑，因为每次观看付费或点播信号仅在与邻域对应的节点内的某人的请求时提供。 点播节目中心连续播放诸如电影之类的节目，时间间隔开始，使得任何用户在看到所请求的特定节目之前将仅具有非常小的延迟。 提供可调光滤波器以便将视频信号切换到去往特定邻域中的节点的光纤上。 布置使用光纤内光栅来去除和插入不同的光频率。 通过在视频分发链中相对较高的位置进行这种插入，可以有效地实现诸如本地商业广告的各种节目源的本地插入。 利用一种用于向电话公司的双绞线提供按需视频信号的接口装置。

    Optical fiber amplifier and laser with flattened gain slope
    3.
    发明授权
    Optical fiber amplifier and laser with flattened gain slope 失效
    光纤放大器和具有平坦增益斜率的激光器

    公开(公告)号：US5271024A

    公开(公告)日：1993-12-14

    申请号：US919921

    申请日：1992-07-27

    Applicant: David R. Huber

    Inventor： David R. Huber

    IPC: G02B6/42 ,  G02F1/35 ,  G02F2/00 ,  H01S3/06 ,  H01S3/067 ,  H01S3/07 ,  H01S3/10 ,  G02B6/34

    CPC classification number: H01S3/067 ,  H01S2301/04 ,  H01S3/0675 ,  H01S3/06754

    Abstract: An in-fiber Bragg grating is used to flatten the gain slope of a fiber optical amplifier or optical fiber laser. The grating can be formed using photorefractive techniques, and is placed within a guided wave portion of a doped optical fiber. The grating is oriented at a nonperpendicular angle with respect to a longitudinal axis of the fiber, and has an interaction wavelength that is selected to flatten the gain slope of the device by diverting excess spontaneous emission therefrom. The interaction wavelength is preferably selected to correspond to a wavelength at or near that at which the spontaneous emission produced by the fiber peaks.

    Optical signal source for overcoming distortion generated by an optical amplifier
    4.
    发明授权
    Optical signal source for overcoming distortion generated by an optical amplifier 失效
    用于克服由光放大器产生的失真的光信号源

    公开(公告)号：US5222089A

    公开(公告)日：1993-06-22

    申请号：US817755

    申请日：1992-01-08

    Applicant: David R. Huber

    Inventor： David R. Huber

    IPC: H04B10/17 ,  H04B10/18

    CPC classification number: H04B10/291 ,  H04B10/25137 ,  H04B10/2912

    Abstract: An amplified signal source is provided for transmitting modulated information signals over a fiber optic communication link, which may have high fiber dispersion. A continuous wave laser produces an optical carrier at a wavelength .lambda..sub.1. The optical carrier is intensity modulated to provide a substantially chirp free output signal. The output signal is amplified in an optical amplifier and coupled for transmission over a link fiber that can have a minimum dispersion at a wavelength .lambda..sub.2 that is different than .lambda..sub.1. The nonzero gain slope of the optical amplifier does not significantly degrade the substantially chirp free output signal.

    Abstract translation: 提供放大的信号源，用于通过可能具有高光纤色散的光纤通信链路发射调制信息信号。 连续波激光产生波长λ1的光载波。光载波被强度调制以提供基本上无啁啾的输出信号。 输出信号在光放大器中被放大并耦合以便在链路光纤上传输，该链路光纤可以具有不同于λ1的波长λ2处的最小色散。光放大器的非零增益斜率不会显着降低基本上的啁啾 自由输出信号。

    Transmission of AM-VSB video signals over an optical fiber
    5.
    发明授权
    Transmission of AM-VSB video signals over an optical fiber 失效
    通过光纤传输AM-VSB视频信号

    公开(公告)号：US5210631A

    公开(公告)日：1993-05-11

    申请号：US454772

    申请日：1989-12-22

    Applicant: David R. Huber ,  Douglas W. Hall ,  Edward F. Murphy

    Inventor： David R. Huber ,  Douglas W. Hall ,  Edward F. Murphy

    IPC: H04B10/17 ,  H04B10/207

    CPC classification number: H04B10/27 ,  H04B10/272 ,  H04B10/291 ,  H04B10/2912

    Abstract: The use of a doped optical fiber amplifier enables the transmission of multi-channel AM-VSB television signals. An Erbium doped fiber amplifier is disclosed. The amplifier is also useful for reducing second order distortion products produced in an amplitude modulated subcarrier optical communication system. The amplifier may be used in a tree and branch structure optical fiber television network.

    Abstract translation: 使用掺杂的光纤放大器能够传输多通道AM-VSB电视信号。 公开了掺铒光纤放大器。 放大器还可用于减小在幅度调制副载波光通信系统中产生的二阶失真产物。 该放大器可用于树和分支结构的光纤电视网络。

    Optical cable TV system
    7.
    发明授权
    Optical cable TV system 失效
    光缆电视系统

    公开(公告)号：US5701186A

    公开(公告)日：1997-12-23

    申请号：US636901

    申请日：1996-03-29

    Applicant: David R. Huber

    Inventor： David R. Huber

    IPC: G02B6/34 ,  H01S3/10 ,  H04B10/17 ,  H04B10/207 ,  H04H20/69 ,  H04J14/02 ,  H04N7/10 ,  H04N7/22 ,  H04N21/81

    CPC classification number: H04H20/69 ,  G02B6/2932 ,  H01S3/10023 ,  H04B10/2941 ,  H04J14/02 ,  H04J14/0206 ,  H04J14/021 ,  H04J14/0213 ,  H04J14/0234 ,  H04J14/0238 ,  H04J14/0252 ,  H04J14/028 ,  H04J14/0282 ,  H04J14/0286 ,  H04J14/0298 ,  H04N21/812 ,  H04N7/10 ,  H04N7/108 ,  H04N7/22 ,  G02B6/2935 ,  H04J14/0201 ,  H04J14/0204 ,  H04J14/0226

    Abstract: An optical cable television system provides a large channel capacity and uses shared resources, whereby the more expensive hardware is shared over a large number of customers so as to minimize the cost per customer. A video switch network is provided which minimizes the temptation of subscribers to pirate signals since pay per view or on demand signals are provided only upon request of someone within a node corresponding to a neighborhood. An on demand program center continuously plays programs, such as movies, at time-staggered starts such that any subscriber will have only very minimal delays before seeing a particular program which is requested. A tuneable optical filter is provided in order to switch video signals onto an optical fiber going to the node in a particular neighborhood. An arrangement uses in-fiber grating in order to remove and insert different optical frequencies. Local insertion of various program sources, such as local commercials, is accomplished effectively by making such insertion at a relatively high point in the video distribution chain. An interface arrangement to provide on demand video signals to telephone company twisted pair wires is utilized.

    Abstract translation: 光缆电视系统提供大的信道容量并且使用共享资源，由此在大量客户上共享更昂贵的硬件，以便最小化每个客户的成本。 提供一种视频切换网络，其最小化用户对盗版信号的诱惑，因为每次观看付费或点播信号仅在对应于邻域的节点内的人的请求时提供。 按需节目中心连续播放诸如电影之类的节目，以便在查看所请求的特定节目之前，任何用户将只有非常小的延迟。 提供可调光滤波器以便将视频信号切换到去往特定邻域中的节点的光纤上。 布置使用光纤内光栅来去除和插入不同的光频率。 通过在视频分发链中相对较高的位置进行这种插入，可以有效地实现诸如本地商业广告的各种节目源的本地插入。 利用一种用于向电话公司的双绞线提供按需视频信号的接口装置。

    Optical amplifier systems with add/drop multiplexing
    8.
    发明授权
    Optical amplifier systems with add/drop multiplexing 失效
    具有分插复用功能的光放大器系统

    公开(公告)号：US5600473A

    公开(公告)日：1997-02-04

    申请号：US394340

    申请日：1995-02-24

    Applicant: David R. Huber

    Inventor： David R. Huber

    IPC: G02B6/34 ,  H01S3/10 ,  H04B10/17 ,  H04B10/207 ,  H04H20/69 ,  H04J14/02 ,  H04N7/10 ,  H04N7/22 ,  H04B10/16 ,  H01S3/00 ,  H04B14/02

    CPC classification number: H04H20/69 ,  H01S3/10023 ,  H04B10/2941 ,  H04J14/02 ,  H04J14/0201 ,  H04J14/0206 ,  H04J14/021 ,  H04J14/0213 ,  H04J14/0238 ,  H04J14/0246 ,  H04J14/0252 ,  H04J14/028 ,  H04J14/0282 ,  H04J14/0286 ,  H04J14/0298 ,  H04N7/10 ,  H04N7/108 ,  H04N7/22 ,  G02B6/2932 ,  G02B6/2935 ,  G02B6/29352 ,  H04J14/0209 ,  H04J14/0226

    Abstract: The present invention relates to optical amplifier systems which include optical add/drop multiplexing capabilities. The optical amplifier system includes a first optical circulator with at least three circulator ports. An optical transmission fiber optically communicates with the first circulator port for transporting a wavelength division multiplexed (WDM) optical transmission signal. A section of optically amplifying rare-earth doped fiber amplifies the WDM optical transmission signal input to the first circulator port. A wavelength-selecting optical fiber including at least one in-fiber Bragg grating for selectively reflecting an optical signal of a particular wavelength from the WDM optical signal optically communicates with the second circulator port. The optical amplifier system further includes a second optical circulator with at least three optical circulator ports, one of which communicates with the wavelength-selecting optical fiber. Another of the optical ports optically communicates with an optical fiber transmitting optical signals to be added to the WDM optical transmission signal.

    Abstract translation: 本发明涉及包括光分插复用能力的光放大器系统。 光放大器系统包括具有至少三个循环器端口的第一光循环器。 光传输光纤与第一循环器端口光传输波分复用（WDM）光传输信号。 光放大稀土掺杂光纤的一部分放大输入到第一循环器端口的WDM光传输信号。 包括至少一个光纤内布拉格光栅的波长选择光纤用于选择性地反射来自WDM光信号的特定波长的光信号与第二循环端口光学通信。 光放大器系统还包括具有至少三个光循环器端口的第二光环行器，其中一个与波长选择光纤通信。 光端口中的另一个与传输要添加到WDM光传输信号的光信号的光纤光学通信。

    Method for linearizing an unbalanced Mach Zehnder optical frequency discriminator
    9.
    发明授权
    Method for linearizing an unbalanced Mach Zehnder optical frequency discriminator 失效
    线性化不平衡马赫曾德尔光学鉴频器的方法

    公开(公告)号：US5373389A

    公开(公告)日：1994-12-13

    申请号：US967207

    申请日：1992-10-27

    Applicant: David R. Huber

    Inventor： David R. Huber

    IPC: H04B10/158 ,  H04B10/00

    CPC classification number: H04B10/676 ,  G02F2203/19

    Abstract: An unbalanced Mach Zehnder optical frequency discriminator is linearized to suppress third order nonlinear distortion. An optical carrier that is modulated in optical frequency is input to an unbalanced Mach Zehnder interferometer to discriminate RF information signals carried on the carrier. The Mach Zehnder interferometer has an adjustable operating point. The operating point is adjusted to a point where the output intensity of the Mach Zehnder interferometer is no more than about ten percent of its maximum value. In order to avoid problems with second order distortion, the optical carrier is modulated with RF signals that do not occupy more than a single octave. The operating point of the device can be adjusted by adjusting an electrical bias thereof, by adjusting the wavelength of the optical carrier, or by adjusting the temperature of the device.

    Abstract translation: 线性化的马赫策德光学鉴频器被抑制为三阶非线性失真。 将以光频率调制的光载波输入到不平衡的马赫曾德干涉仪，以区分载波上携带的RF信息信号。 Mach Zehnder干涉仪具有可调节的工作点。 操作点被调整到马赫策德干涉仪的输出强度不超过其最大值的百分之十的点。 为了避免二阶失真的问题，光载波用不超过单个八度的RF信号进行调制。 可以通过调整光学载体的波长或者通过调节装置的温度来调节其装置的电偏差来调节装置的工作点。

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