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    Transmission of AM-VSB video signals over an optical fiber
    2.
    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。

    Dispersion compensating devices and systems
    4.
    发明授权
    Dispersion compensating devices and systems 失效
    色散补偿装置和系统

    公开(公告)号：US5361319A

    公开(公告)日：1994-11-01

    申请号：US830692

    申请日：1992-02-04

    Applicant: A. Joseph Antos ,  Michael G. Blankenship ,  Douglas W. Hall ,  Edward F. Murphy ,  David K. Smith

    Inventor： A. Joseph Antos ,  Michael G. Blankenship ,  Douglas W. Hall ,  Edward F. Murphy ,  David K. Smith

    IPC: G02B6/02 ,  G02B6/036 ,  H01S3/06 ,  H04B10/02 ,  H04B10/18 ,  G02B6/22 ,  G02B6/36

    CPC classification number: H04B10/25253 ,  G02B6/02261 ,  G02B6/0228 ,  G02B6/03627 ,  G02B6/03644 ,  G02B6/03666 ,  G02B6/29377 ,  C03B2203/36

    Abstract: Disclosed is a family of dispersion compensating optical fibers that are adapted for use with conventional single-mode transmission fibers that are optimized for zero dispersion operation at a wavelength in the range from 1290 nm to 1330 nm to form a transmission link suitable for low dispersion operation in the 1520-1565 nm wavelength window. The dispersion compensating fibers are capable of providing a dispersion more negative than -20 ps/nm-km and attenuation less than 1 dB/km at wavelengths in the 1520-1565 nm region. Certain of the dispersion compensating fibers also exhibit a dispersion versus wavelength relationship having a negative slope in the 1520-1565 nm region, to compensate for the dispersion versus wavelength slope of the transmission fiber. The dispersion compensating fiber can be advantageously combined with a fiber amplifier to form a compensator that is adapted to overcome attenuation introduced into the system by the dispersion compensating fiber. In one embodiment, the dispersion compensating fiber is also a distributed fiber amplifier.

    Abstract translation: 公开了一种适用于常规单模传输光纤的色散补偿光纤系列，其针对在1290nm至1330nm范围内的波长的零色散操作进行了优化，以形成适合于低色散操作的传输链路 在1520-1565 nm波长窗口。 色散补偿光纤能够在1520-1565nm区域的波长处提供比-20ps / nm-km更小的衰减和小于1dB / km的衰减。 某些色散补偿光纤还表现出在1520-1565nm区域具有负斜率的色散相对波长关系，以补偿传输光纤的色散对波长斜率。 色散补偿光纤可以有利地与光纤放大器组合以形成补偿器，该补偿器适于克服由色散补偿光纤引入到系统中的衰减。 在一个实施例中，色散补偿光纤也是分布式光纤放大器。

    Integrated optical signal amplifier
    5.
    发明授权
    Integrated optical signal amplifier 失效
    集成光信号放大器

    公开(公告)号：US5128801A

    公开(公告)日：1992-07-07

    申请号：US647778

    申请日：1991-01-30

    Applicant: Richard Jansen ,  Pascale LaBorde ,  Christian Lerminiaux ,  Carlos O. N. Benveniste ,  Douglas W. Hall

    Inventor： Richard Jansen ,  Pascale LaBorde ,  Christian Lerminiaux ,  Carlos O. N. Benveniste ,  Douglas W. Hall

    IPC: H01S3/063

    CPC classification number: H01S3/063

    Abstract: An optical signal amplifier with a waveguide path integrated into a glass body that is doped with optically active material. The signal to be amplified is transmitted through the waveguide and the pump power is coupled into the waveguide at one end. The waveguide comprises closely spaced adjacent guide lengths in the form of a spiral, zigzag paths between mirrors, or parallel paths with connecting semicircles at alternating ends of succeeding pairs of paths.

    Abstract translation: 一种光信号放大器，其具有集成到玻璃体中的波导路径，其掺杂有光学活性材料。 待放大的信号通过波导传输，泵浦功率在一端耦合到波导中。 波导包括呈反射镜之间的螺旋状锯齿状路径形式的紧密间隔的相邻引导长度，或者在后续路径对的交替端连接半圆的平行路径。

    L-band amplification with detuned 980nm pump
    6.
    发明授权
    L-band amplification with detuned 980nm pump 有权
    L波段放大与失谐的980nm泵

    公开(公告)号：US06307669B1

    公开(公告)日：2001-10-23

    申请号：US09417262

    申请日：1999-10-12

    Applicant: Felton A. Flood ,  Douglas W. Hall

    Inventor： Felton A. Flood ,  Douglas W. Hall

    IPC: H01S300

    CPC classification number: H01S3/067 ,  H01S3/094003 ,  H01S3/1603 ,  H01S3/1608 ,  H01S2302/00 ,  H01S2303/00

    Abstract: A method of operating an optical amplifier for improved gain and pump-to-signal conversion efficiency in a long wavelength spectral region (L-band) of the emission spectrum of a rare earth doped gain medium having a known pump absorption band involves the steps of providing an optical signal to the amplifier having a large-signal input power; and providing pumping light to the amplifier having a wavelength that is different from a center wavelength of the known pump absorption band for amplifying the optical signal. Signal gain and improved pump-to-signal conversion efficiency was demonstrated for an erbium L-band signal by detuning the pump between about ±0-30 nm on either side of the pump band center wavelength of 979-980 nm. An optical amplifier employing the described method is also disclosed.

    Abstract translation: 在具有已知的泵吸收带的稀土掺杂增益介质的发射光谱的长波长光谱区域（L波段）中操作光放大器以改善增益和泵浦到信号转换效率的方法包括以下步骤： 向具有大信号输入功率的放大器提供光信号; 以及向具有不同于已知泵吸收带的中心波长的波长的放大器提供泵浦光，用于放大光信号。 通过在泵带中心波长979-980 nm的任一侧使约在±0-30nm之间的泵失谐，从而为铒L波段信号证明了信号增益和提高的泵浦到信号转换效率。 还公开了采用所述方法的光放大器。

    Fiber amplifier with one single mode core having modified gain spectrum
    7.
    再颁专利
    Fiber amplifier with one single mode core having modified gain spectrum 失效
    具有一个单模核心的光纤放大器具有修改的增益谱

    公开(公告)号：USRE41438E1

    公开(公告)日：2010-07-13

    申请号：US09105572

    申请日：1998-06-26

    Applicant: Douglas W. Hall ,  Mark A. Newhouse

    Inventor： Douglas W. Hall ,  Mark A. Newhouse

    IPC: G02B6/00 ,  G02B6/22

    CPC classification number: H01S3/10023 ,  H01S3/06766 ,  H01S3/06787 ,  H01S3/1608 ,  H01S2301/04

    Abstract: Disclosed is a fiber amplifier system including a gain fiber having a single-mode core containing dopant ions capable of producing stimulated emission of light at wavelength λs when pumped with light of wavelength λp. Absorbing ion filtering means is operatively associated with the gain fiber to alter the gain curve. If the absorbing ions are the same as the gain ions of the gain fiber, the system further includes means for preventing pump light from exciting the gain ions of the filtering means. The excitation prevention means may take the form of means for attenuating pump light. If the absorbing ions are different from the dopant ions of the gain fiber, such absorbing ions can be subjected to light at wavelength αp, but they will remain unexcited. Such absorbing ions can be used to co-dope the gain fiber, or they can be incorporated into the core of a fiber that is in series with the gain fiber.

    Abstract translation: 公开了一种光纤放大器系统，其包括具有单模核心的增益光纤，所述单模核心包含掺杂离子，当用波长λp的光泵浦时，能够产生波长λs的受激发射的光。 吸收离子过滤装置可操作地与增益光纤相关联以改变增益曲线。 如果吸收离子与增益光纤的增益离子相同，则系统还包括用于防止泵浦光激发过滤装置的增益离子的装置。 励磁防止装置可以采取用于衰减泵浦光的装置的形式。 如果吸收离子与增益纤维的掺杂剂离子不同，这样的吸收离子可以经受波长αp的光，但是它们将保持不变。 这种吸收离子可以用于共增益纤维，或者它们可以并入到与增益纤维串联的纤维的芯中。

    Optical amplifier with power dependent feedback
    9.
    发明授权
    Optical amplifier with power dependent feedback 失效
    具有功率反馈的光放大器

    公开(公告)号：US06339495B1

    公开(公告)日：2002-01-15

    申请号：US09451314

    申请日：1999-11-30

    Applicant: Gregory J. Cowle ,  Douglas W. Hall ,  Thomas W. McNamara ,  Chiachi Wang

    Inventor： Gregory J. Cowle ,  Douglas W. Hall ,  Thomas W. McNamara ,  Chiachi Wang

    IPC: H04B1017

    CPC classification number: H04J14/0221 ,  H04B10/296 ,  H04J14/0212

    Abstract: An optical amplifier includes an optical feedback resonant laser cavity (OFRC) including a power dependent loss element (PDLE) having the characteristic that as the incident laser power on the PDLE increases the cavity loss decreases. The OFRC with the PDLE provides optical gain control or optical power control for a WDM amplifier or a single channel power equalization amplifier (PEA), respectively. A 1×N×N WADM node incorporating more than one of these amplifiers, at least some of which commonly share a pump source, and a method for controlling a transient power change in a single channel optical amplifier or reducing a DC gain error in a WDM optical amplifier that are subject to dynamically variable operating conditions at an input of the amplifier, are also disclosed.

    Abstract translation: 光放大器包括光反馈谐振激光腔（OFRC），其包括功率依赖损耗元件（PDLE），其特征在于，随着PDLE上的入射激光功率增加，空腔损耗减小。 OFRC与PDLE分别为WDM放大器或单通道功率均衡放大器（PEA）分别提供光增益控制或光功率控制。 包括这些放大器中的多于一个的1xNxN WADM节点，其至少一些通常共享泵浦源，以及用于控制单通道光放大器中的瞬态功率变化或减少WDM光放大器中的DC增益误差的方法， 在放大器的输入处经受动态可变的工作条件。

    Packaging of high power semiconductor lasers
    10.
    发明授权
    Packaging of high power semiconductor lasers 失效
    大功率半导体激光器的封装

    公开(公告)号：US5629952A

    公开(公告)日：1997-05-13

    申请号：US481008

    申请日：1995-06-07

    Applicant: Roger F. Bartholomew ,  Paul A. Jakobson ,  Douglas W. Hall ,  Julia A. Sharps

    Inventor： Roger F. Bartholomew ,  Paul A. Jakobson ,  Douglas W. Hall ,  Julia A. Sharps

    IPC: H01L33/48 ,  H01S5/00 ,  H01S5/022 ,  H01S3/00 ,  H01L23/36

    CPC classification number: H01L33/483 ,  H01S5/0021 ,  H01S5/0287 ,  H01L2924/0002 ,  H01S5/02204 ,  H01S5/02224

    Abstract: A package for a high power semiconductor laser comprising a hermetically sealed container filled with a dry gaseous medium containing oxygen. The presence of oxygen in the laser atmosphere is counter to standard practice in the art which teaches the use of an atmosphere of a dry inert gas. The package also includes a getter for organic impurities, e.g., a getter composed of a porous silica or a zeolite. The hydrogen content of the materials used to form the package are reduced by baking at an elevated temperature for an extended period of time, e.g., at 150.degree. C. for 200 hours.

    Abstract translation: 一种用于大功率半导体激光器的封装，包括填充有含氧的干燥气态介质的密封容器。 在激光气氛中存在氧与本领域的标准做法相反，该方法教导了使用干燥惰性气体的气氛。 该包装还包括有机杂质的吸气剂，例如由多孔二氧化硅或沸石组成的吸气剂。 用于形成包装的材料的氢含量通过在升高的温度下长时间烘烤（例如在150℃下）减少200小时。

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