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39 条记录 (耗时 0.02 秒)

    Optical isolator
    11.
    发明授权
    Optical isolator 失效
    光隔离器

    公开(公告)号：US5381261A

    公开(公告)日：1995-01-10

    申请号：US937896

    申请日：1992-11-05

    申请人： Shigeru Hirai ,  Youichi Ishiguro ,  Yasuji Hattori ,  Masayuki Nishimura ,  Masayuki Shigematsu ,  Minoru Watanabe ,  Kouji Nakazato

    发明人： Shigeru Hirai ,  Youichi Ishiguro ,  Yasuji Hattori ,  Masayuki Nishimura ,  Masayuki Shigematsu ,  Minoru Watanabe ,  Kouji Nakazato

    IPC分类号： G02F1/09 ,  G02B5/30

    CPC分类号： G02F1/093 ,  G02F2203/06 ,  Y10S372/703

    摘要： An optical isolator not dependent on the plane of polarization of an incident beam and does not allow the plane of polarization to change on the outgoing side. The optical isolator comprises a first parallel flat double refractive crystal substance; a first Faraday rotor for rotating the plane of polarization of a beam; a second parallel flat double refractive crystal substance; a second Faraday rotor for rotating the plane of polarization in a direction opposite to that in which said first Faraday rotor rotates the plane of polarization; a third parallel flat double refractive substance; a fourth parallel flat double refractive substance; and permanent magnets for magnetizing the Faraday rotor and second Faraday rotors. Since a pair of Faraday rotors for rotating the plane of polarization in opposite directions, the plane of polarization on the incident side does not change on the outgoing side.

    摘要翻译： PCT No.PCT / JP92 / 00171 Sec。 371日期：1992年11月5日 102（e）日期1992年11月5日PCT提交1992年2月19日PCT公布。 出版物WO92 / 15040 日期：1992年9月3日。光隔离器不依赖于入射光束的偏振平面，不允许偏振平面在出射侧发生变化。 光隔离器包括第一平行扁平双折射晶体物质; 用于旋转梁的偏振平面的第一法拉第转子; 第二平行平面双折射晶体物质; 第二法拉第转子，用于在与所述第一法拉第转子旋转偏振平面的方向相反的方向上旋转偏振平面; 第三平行平面双折射物质; 第四平行平面双折射物质; 以及用于磁化法拉第转子和第二法拉第转子的永磁体。 由于用于在相反方向旋转偏振平面的一对法拉第转子，入射侧的偏振面在出射侧不变。

    Optical amplifier repeater system
    12.
    发明授权
    Optical amplifier repeater system 有权
    光放大器中继器系统

    公开(公告)号：US06259554B1

    公开(公告)日：2001-07-10

    申请号：US09402063

    申请日：1999-09-28

    申请人： Masayuki Shigematsu ,  Masayuki Nishimura

    发明人： Masayuki Shigematsu ,  Masayuki Nishimura

    IPC分类号： H01S300

    CPC分类号： H04B10/2972 ,  H04B10/03 ,  H04B10/0775 ,  H04B10/0777 ,  H04B10/2918 ,  H04B2210/078 ,  H04B2210/08

    摘要： A repeater station 10 detects whether or not an abnormality exists in each of signal light and monitor light having arrived from a terminal station 1 or a repeater station 20, and controls, according to the result of detection, operations of optical amplifiers 11 and 12 and the monitor light. In the case where both of the signal light and monitor light arriving from the terminal station 1 via the optical transmission line for the downstream direction are abnormal, the optical amplifier 11 for the downstream direction stops its amplifying operation by itself, whereas a monitor control apparatus 13 stops the amplifying operation of the other optical amplifier for the upstream direction and also stops transmitting the monitor light to the terminal station 1 in the upstream direction.

    摘要翻译： 中继站10检测在从终端站1或中继站20到达的信号光和监视光中的每一个中是否存在异常，并且根据检测结果控制光放大器11和12的操作和 显示器灯。 在从终端站1经由用于下游方向的光传输线路到达的信号光和监视光都是异常的情况下，用于下游方向的光放大器11自身停止其放大操作，而监视器控制装置 13停止上游侧的另一光放大器的放大动作，并且在上游方向上停止向终端站1发送监视光。

    Chromatic dispersion compensator and chromatic dispersion compensating optical communication system
    13.
    发明授权
    Chromatic dispersion compensator and chromatic dispersion compensating optical communication system 失效
    色散补偿器和色散补偿光通信系统

    公开(公告)号：US6055081A

    公开(公告)日：2000-04-25

    申请号：US782756

    申请日：1997-01-10

    申请人： Yasushi Koyano ,  Masayuki Shigematsu

    发明人： Yasushi Koyano ,  Masayuki Shigematsu

    IPC分类号： H04B10/18

    摘要： In a chromatic dispersion compensator, an optical signal directing unit such as an optical circulator or a directional coupler having a first, second, third and fourth ports. The optical signal directing unit directs an optical signal inputted from one of the ports to another port of the ports. A reflection-type compensator including a dispersion compensating fiber, a reflecting portion and changing unit for changing a polarization direction of a reciprocating signal light, in which the dispersion compensating fiber is connected to the reflecting portion via the changing unit. An input transmission path which is connected to the first port; and an output transmission path which is connected to the fourth port so that the signal light is outputted from the fourth port. The reflection-type compensating unit is connected to one of the second and third ports, and the chirped grating is connected to the other port.

    摘要翻译： 在色散补偿器中，诸如光循环器的光信号引导单元或具有第一，第二，第三和第四端口的定向耦合器。 光信号引导单元将从一个端口输入的光信号引导到端口的另一端口。 一种反射型补偿器，包括色散补偿光纤，反射部分和用于改变往复信号光的偏振方向的改变单元，其中色散补偿光纤通过改变单元连接到反射部分。 连接到第一端口的输入传输路径; 以及输出传输路径，其连接到第四端口，使得信号光从第四端口输出。 反射型补偿单元连接到第二和第三端口中的一个，并且啁啾光栅连接到另一端口。

    Chromatic dispersion compensator and chromatic dispersion compensating optical communication system
    14.
    发明授权
    Chromatic dispersion compensator and chromatic dispersion compensating optical communication system 失效
    色散补偿器和色散补偿光通信系统

    公开(公告)号：US5701188A

    公开(公告)日：1997-12-23

    申请号：US535902

    申请日：1995-09-28

    申请人： Masayuki Shigematsu ,  Yasushi Koyano

    发明人： Masayuki Shigematsu ,  Yasushi Koyano

    IPC分类号： G02B6/34 ,  H04B10/2519 ,  H04B10/2525 ,  H04B10/00

    CPC分类号： G02B6/29374 ,  G02B6/29317 ,  H04B10/2519 ,  H04B10/2525

    摘要： A chromatic dispersion compensator includes an optical circulator or a directional coupler having a first, second and third ports; an input transmission path connected to the first port; an output transmission path connected to the third port; a chirped grating connected to the second port; and a dispersion compensating fiber connected to at least one of the first, second and third ports. The dispersion compensating fiber and the chirped grating have chromatic dispersion characteristics which are opposite to the chromatic dispersion characteristics of the input and output transmission paths. In the wavelength compensator, the optical signal is incident into the first port from the input transmission path, and is made to go out to the chirped grating from the second port. Further, the optical signal is incident from the chirped grating to return to the second port, and is made to go to the output transmission path from the third port.

    摘要翻译： 色散补偿器包括具有第一，第二和第三端口的光循环器或定向耦合器; 连接到第一端口的输入传输路径; 连接到第三端口的输出传输路径; 连接到第二端口的啁啾光栅; 以及连接到第一，第二和第三端口中的至少一个的色散补偿光纤。 色散补偿光纤和啁啾光栅具有与输入和输出传输路径的色散特性相反的色散特性。 在波长补偿器中，光信号从输入传输路径入射到第一端口中，并从第二端口出来到啁啾光栅。 此外，光信号从啁啾光栅入射返回到第二端口，并使其从第三端口进入输出传输路径。

    Optical fiber amplifier
    17.
    发明授权
    Optical fiber amplifier 失效
    光纤放大器

    公开(公告)号：US5742427A

    公开(公告)日：1998-04-21

    申请号：US752958

    申请日：1996-11-20

    申请人： Motoki Kakui ,  Masayuki Shigematsu

    发明人： Motoki Kakui ,  Masayuki Shigematsu

    IPC分类号： G02F1/35 ,  H01S3/06 ,  H01S3/067 ,  H01S3/07 ,  H01S3/094 ,  H01S3/10 ,  H01S3/16 ,  H01S3/23 ,  H04B10/2525 ,  H04B10/29 ,  H04B10/294 ,  H04B10/516 ,  H04B10/61 ,  G02B6/28

    CPC分类号： H01S3/06758 ,  H01S2301/04 ,  H01S3/094096 ,  H01S3/1608 ,  H01S3/1691

    摘要： This invention relates to an optical fiber amplifier for amplifying and outputting input signal light. The optical fiber amplifier includes first to third amplification optical fibers. The first to third optical fibers are arranged such that the signal light passes through the first to third optical fibers in the order named. A first value as the (emission cross-section)/(absorption cross-section) of the first optical fiber and a third value as the (emission cross-section)/(absorption cross-section) of the third optical fiber are set to be larger than a second value as the (emission cross-section)/(absorption cross-section) of the second optical fiber. With this arrangement, low noise can be achieved in the first optical fiber, and a large output can be achieved in the third optical fiber. In addition, the gain characteristics associated with wavelength in this optical fiber amplifier as the overall transmission line including the first, second, and third amplification optical fibers can be sufficiently flattened.

    摘要翻译： 本发明涉及一种用于放大和输出输入信号光的光纤放大器。 光纤放大器包括第一至第三放大光纤。 第一至第三光纤布置成使得信号光以所述顺序通过第一至第三光纤。 作为第一光纤的（发光截面）/（吸收截面）和作为第三光纤的（发光截面）/（吸收截面）的第三值的第一值被设定为 大于作为第二光纤的（发射截面）/（吸收截面）的第二值。 利用这种布置，可以在第一光纤中实现低噪声，并且可以在第三光纤中实现大的输出。 此外，作为包括第一，第二和第三放大光纤的整体传输线的该光纤放大器中与波长相关联的增益特性可以被充分地平坦化。

    Light communication system
    18.
    发明授权
    Light communication system 失效
    光通信系统

    公开(公告)号：US5214728A

    公开(公告)日：1993-05-25

    申请号：US888474

    申请日：1992-05-22

    申请人： Masayuki Shigematsu ,  Kohji Nakazato ,  Izumi Sankawa

    发明人： Masayuki Shigematsu ,  Kohji Nakazato ,  Izumi Sankawa

    IPC分类号： H04B10/08 ,  H04B10/17 ,  H04B10/213

    CPC分类号： H04B10/27 ,  H04B10/038 ,  H04B10/071 ,  H04B10/272 ,  H04B10/291 ,  H04B10/2912

    摘要： A bi-directional optical communication system. A first optical fiber includes a plurality of pieces, each piece having a first and second end. An optical amplifier for amplifying optical signals transmitted in a first direction is coupled to first and second pieces of the first optical fiber. A second optical fiber is coupled to the first and second pieces, bypasses the optical amplifier and transmits optical signals in a second direction opposite to the first direction. A first optical signal generator apparatus coupled to the first piece of the first optical fiber provides optical signals propagating in the first direction to a optical receiver apparatus coupled to the second piece of the first optical fiber. A second optical signal generator in the optical receiver apparatus provides optical signals propagating in the second direction to the first optical signal generator apparatus. A second optical receiver and a monitor, both in the first optical signal generator apparatus, receive the optical signals propagating in the second direction and monitor various operating conditions of the optical communication system.

    摘要翻译： 双向光通信系统。 第一光纤包括多个片，每片具有第一端和第二端。 用于放大沿第一方向传输的光信号的光放大器耦合到第一和第二片第一光纤。 第二光纤耦合到第一和第二片，绕过光放大器并沿与第一方向相反的第二方向传输光信号。 耦合到第一光纤的第一片的第一光信号发生器装置提供沿第一方向传播的光信号到耦合到第一光纤的第二片的光接收装置。 光接收装置中的第二光信号发生器提供沿第二方向传播的光信号到第一光信号发生装置。 在第一光信号发生器装置中的第二光接收器和监视器接收沿第二方向传播的光信号并监视光通信系统的各种操作状态。