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    Optical amplifier for amplifying light in a long wavelength band
    33.
    发明授权
    Optical amplifier for amplifying light in a long wavelength band 有权

    公开(公告)号：US06411431B1

    公开(公告)日：2002-06-25

    申请号：US09911418

    申请日：2001-07-25

    申请人： Yasushi Sugaya ,  Susumu Kinoshita ,  Hiroshi Onaka

    发明人： Yasushi Sugaya ,  Susumu Kinoshita ,  Hiroshi Onaka

    IPC分类号： H01S0300

    摘要： An optical amplifier for amplifying light in a longer wavelength band. The optical amplifier includes first and second optical fibers doped with a rare earth element and optically connected so that a signal light travels through the first optical fiber and then through the second optical fiber. Excitation light causes the signal light to be amplified in both the first and second optical fibers. Spontaneous emission lights are generated in the first optical fiber. An oscillation generator causes the spontaneous emission lights to oscillate in the first optical fiber, to thereby generate laser oscillation. Light generated by the laser oscillation is supplied to the second optical fiber as excitation light in the second optical fiber. The oscillation generator can be formed by fiber gratings along the first optical fiber and which reflect spontaneous emission light at a predetermined wavelength, thereby causing spontaneous emission lights to oscillate between the fiber gratings in the first optical fiber. Alternatively, the oscillation generator can be a traveling-wave type optical oscillator. In an additional embodiment, an optical amplifier includes first and second optical amplifiers amplifying first and second signal lights, respectively, the first and second signal lights being in different wavelength bands. An excitation light providing device branches a portion of the signal light amplified by the first optical amplifier, and provides the branched portion to the second optical amplifier as excitation light in the second optical amplifier.

    Multi-wavelength light amplifier
    34.
    发明授权
    Multi-wavelength light amplifier 有权
    多波长光放大器

    公开(公告)号：US06369938B1

    公开(公告)日：2002-04-09

    申请号：US09339258

    申请日：1999-06-24

    申请人： Yasushi Sugaya ,  Miki Takeda ,  Susumu Kinoshita ,  Terumi Chikama

    发明人： Yasushi Sugaya ,  Miki Takeda ,  Susumu Kinoshita ,  Terumi Chikama

    IPC分类号： H01S300

    CPC分类号： H04B10/296 ,  H01S3/06758 ,  H01S3/10015 ,  H01S3/1301 ,  H01S3/1305 ,  H01S2301/04 ,  H04B10/2931

    摘要： A multi-wavelength light amplifier includes a first-stage light amplifier which has a first light amplifying optical fiber amplifying a light input, a second-stage light amplifier which has a second light amplifying optical fiber amplifying a first light output from the first-stage light amplifier, and an optical system which maintains a second light output of the second-stage light amplifier at a constant power level. The first-stage and second-stage light amplifiers have different gain vs wavelength characteristics so that the multi-wavelength light amplifier has no wavelength-dependence of a gain thereof.

    摘要翻译： 多波长光放大器包括具有放大光输入的第一放大光纤的第一级光放大器，具有放大从第一级输出的第一光输出的第二光放大光纤的第二级光放大器 光放大器和将第二级光放大器的第二光输出维持在恒定功率电平的光学系统。 第一级和第二级光放大器具有不同的增益与波长特性，使得多波长光放大器与其增益没有波长依赖性。

    Optical amplifier for amplifying light in a long wavelength band
    35.
    发明授权
    Optical amplifier for amplifying light in a long wavelength band 有权
    用于放大长波段的光的光放大器

    公开(公告)号：US06288834B1

    公开(公告)日：2001-09-11

    申请号：US09334622

    申请日：1999-06-17

    申请人： Yasushi Sugaya ,  Susumu Kinoshita ,  Hiroshi Onaka

    发明人： Yasushi Sugaya ,  Susumu Kinoshita ,  Hiroshi Onaka

    IPC分类号： H01S300

    CPC分类号： H04B10/291 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/06766 ,  H01S3/0677 ,  H01S3/094003 ,  H01S3/094023 ,  H04B10/2972

    摘要： An optical amplifier for amplifying light in a longer wavelength band. The optical amplifier includes first and second optical fibers doped with a rare earth element and optically connected so that a signal light travels through the first optical fiber and then through the second optical fiber. Excitation light causes the signal light to be amplified in both the first and second optical fibers. Spontaneous emission lights are generated in the first optical fiber. An oscillation generator causes the spontaneous emission lights to oscillate in the first optical fiber, to thereby generate laser oscillation. Light generated by the laser oscillation is supplied to the second optical fiber as excitation light in the second optical fiber. The oscillation generator can be formed by fiber gratings along the first optical fiber and which reflect spontaneous emission light at a predetermined wavelength, thereby causing spontaneous emission lights to oscillate between the fiber gratings in the first optical fiber. Alternatively, the oscillation generator can be a traveling-wave type optical oscillator. In an additional embodiment, an optical amplifier includes first and second optical amplifiers amplifying first and second signal lights, respectively, the first and second signal lights being in different wavelength bands. An excitation light providing device branches a portion of the signal light amplified by the first optical amplifier, and provides the branched portion to the second optical amplifier as excitation light in the second optical amplifier.

    摘要翻译： 一种用于放大较长波段的光的光放大器。 光放大器包括掺杂有稀土元素的第一和第二光纤并且光学连接，使得信号光通过第一光纤然后通过第二光纤。 激励光使信号光在第一和第二光纤中都被放大。 在第一光纤中产生自发发光。 振荡发生器使自发发射光在第一光纤中振荡，从而产生激光振荡。 由激光振荡产生的光作为第二光纤中的激发光提供给第二光纤。 振荡发生器可以由沿着第一光纤的光纤光栅形成，并且反射出预定波长的自发发射光，从而使自发发射光在第一光纤中的光纤光栅之间振荡。 或者，振荡发生器可以是行波型光学振荡器。 在另外的实施例中，光放大器包括分别放大第一和第二信号光的第一和第二光放大器，第一和第二信号光分别处于不同的波段。 激发光提供装置分支由第一光放大器放大的信号光的一部分，并将分支部分提供给第二光放大器作为第二光放大器中的激发光。

    Optical communication system, and optical communication method and communication unit therefor
    38.
    发明授权
    Optical communication system, and optical communication method and communication unit therefor 有权
    光通信系统，光通信方法及通信单元

    公开(公告)号：US08200088B2

    公开(公告)日：2012-06-12

    申请号：US12474683

    申请日：2009-05-29

    申请人： Kyosuke Sone ,  Susumu Kinoshita

    发明人： Kyosuke Sone ,  Susumu Kinoshita

    IPC分类号： H04J14/00

    CPC分类号： H04L12/2852 ,  H04L12/42 ,  H04L45/04 ,  H04L45/124 ,  H04L45/62

    摘要： A communication unit inhibits delay and jitter during network communication, improving the communication quality. For this purpose, the communication unit includes: a first terminator that terminates a communication channel in the first optical communication scheme established between the communication unit and another communication unit; a second terminator that terminates a signal in the second optical communication scheme; and a path setting switch that switches between a first signal path setting and a second signal path setting.

    摘要翻译： 通信单元在网络通信期间抑制延迟和抖动，提高通信质量。 为此，通信单元包括：第一终端，终止在通信单元和另一通信单元之间建立的第一光通信方案中的通信信道; 第二终端器，其终止第二光通信方案中的信号; 以及在第一信号路径设置和第二信号路径设置之间切换的路径设置开关。

    OPTICAL AMPLIFIER
    39.
    发明申请
    OPTICAL AMPLIFIER 有权
    光放大器

    公开(公告)号：US20110286085A1

    公开(公告)日：2011-11-24

    申请号：US13088904

    申请日：2011-04-18

    申请人： Kyosuke SONE ,  Susumu Kinoshita

    发明人： Kyosuke SONE ,  Susumu Kinoshita

    IPC分类号： H01S3/13 ,  H01S3/14

    CPC分类号： H04B10/2942 ,  H01S3/06754 ,  H01S3/10015 ,  H01S3/10038 ,  H01S3/10069 ,  H01S3/1608

    摘要： An optical amplifier includes an input port, an output port, an amplification medium, a light source, a monitor, and a controller. The amplification medium with which doped an rare-earth element for optical amplification is allocated on an optical path between the input port and the output port. The light source supplies the amplification medium with an excitation light. The monitor monitors a total power of an optical signal of each wavelength according to a monitor period which is longer than a transient response time of the amplification medium. The controller controls the light source so that a power of the excitation light is constant when a monitor value of the monitor is equal to or smaller than a predetermined threshold value and controls the light source so that an optical gain in the amplification medium is constant when the monitor value is larger than the predetermined threshold value.

    摘要翻译： 光放大器包括输入端口，输出端口，放大介质，光源，监视器和控制器。 掺杂有用于光放大的稀土元素的放大介质被分配在输入端口和输出端口之间的光路上。 光源向放大介质提供激发光。 监视器根据比放大介质的瞬态响应时间长的监视周期监视每个波长的光信号的总功率。 控制器控制光源，使得当监视器的监视值等于或小于预定阈值时激发光的功率是恒定的，并且控制光源使得放大介质中的光学增益是恒定的 监视值大于预定阈值。

    System and method for protecting optical light-trails
    40.
    发明授权
    System and method for protecting optical light-trails 有权
    保护光线的系统和方法

    公开(公告)号：US07787763B2

    公开(公告)日：2010-08-31

    申请号：US11098720

    申请日：2005-04-04

    申请人： Ashwin A. Gumaste ,  Paparao Palacharla ,  Susumu Kinoshita

    发明人： Ashwin A. Gumaste ,  Paparao Palacharla ,  Susumu Kinoshita

    IPC分类号： H04B10/00

    CPC分类号： H04B10/275 ,  H04B10/032 ,  H04B10/27 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/021 ,  H04J14/0212 ,  H04J14/0275 ,  H04J14/0295

    摘要： Providing protection for a network includes establishing a light-trail through a sequence of nodes of an optical network, where the sequence of nodes is coupled by a first fiber and by a second fiber. Traffic is communicated through a plurality of connections of the light-trail, where a connection is operable to communicate traffic from a source node of the sequence of nodes to one or more destination nodes of the sequence of nodes. A failure of the light-trail is detected. A protection light-trail corresponding to the light-trail is established. The traffic of the plurality of connections is communicated through the protection light-trail.

    摘要翻译： 为网络提供保护包括通过光网络的节点序列来建立光轨迹，其中节点序列由第一光纤和第二光纤耦合。 业务通过光轨的多个连接进行通信，其中连接可操作以将流量从节点序列的源节点传送到节点序列的一个或多个目标节点。 检测到光轨的故障。 建立对应于轻轨的保护光路。 通过保护光路传送多个连接的通信量。