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    OPTICAL AMPLIFIER, OPTICAL AMPLIFYING SYSTEM, WAVELENGTH CONVERTER, OPTICAL AMPLIFICATION METHOD, AND OPTICAL COMMUNICATION SYSTEM
    53.
    发明公开
    OPTICAL AMPLIFIER, OPTICAL AMPLIFYING SYSTEM, WAVELENGTH CONVERTER, OPTICAL AMPLIFICATION METHOD, AND OPTICAL COMMUNICATION SYSTEM 审中-公开
    光放大器，光系统的加强，波长转换器，方法光学增益和光通信系统

    公开(公告)号：EP2682813A1

    公开(公告)日：2014-01-08

    申请号：EP12754607.5

    申请日：2012-03-05

    Applicant: Furukawa Electric Co., Ltd.

    Inventor： TAKASAKA, Shigehiro ,  MIMURA, Yu

    IPC: G02F1/39 ,  G02F1/35

    CPC classification number: H01S3/10023 ,  G02F1/395 ,  G02F2201/04 ,  G02F2201/307 ,  G02F2203/50 ,  G02F2203/585 ,  H01S3/06725 ,  H01S3/06754 ,  H01S3/302 ,  H01S2301/04 ,  H04B10/294

    Abstract: An optical amplifier includes an optical gain fiber into which signal light and pump light are input and at least one relative phase shifter is inserted. Preferably, the relative phase shifter is inserted so that the relative phase in the lengthwise direction of the optical gain fiber falls within a predetermined range containing 0.5 n. Preferably, the optical gain fiber is a highly non-linear optical fiber having a non-linearity constant of at least 10/W/km. Preferably, the dispersion of the optical gain fiber is within the range from -1 ps/nm/km to 1 ps/nm/km in an amplification band. Preferably, the absolute value of the dispersion slope of the optical gain fiber at a zero dispersion wavelength is no greater than 0.05 ps/nm 2 /km.

    Abstract translation: 一种光放大器，包括放大用光纤成信号光和泵浦光被输入和至少一个相对移相器被插入。 优选地，所述相对移相器被插入在放大用光纤的长度方向如此做了相对的相位，如果含0.5N的。优选在预定范围内，所述放大用光纤是具有非线性度的高度非线性光纤 常数至少为10 / W / km的的。 优选地，光学增益光纤的色散是从-1 PS / nm / km的范围内，以1个皮秒/ nm / km的在扩增带。 优选地，在零色散波长的光纤增益的色散斜率的绝对值是不大于0:05 PS /纳米2 / km的。

    Electrically controllable optical element using an optical fibre
    54.
    发明公开
    Electrically controllable optical element using an optical fibre 审中-公开
    Elektrisch steuerbares Optisches Element mit einer optischen Faser

    公开(公告)号：EP2187253A1

    公开(公告)日：2010-05-19

    申请号：EP08020044.7

    申请日：2008-11-17

    Applicant: SWET OPTICS GMBH

    Inventor： Petrov, Victor, Prof.

    IPC: G02F1/01

    CPC classification number: G02F1/0118 ,  G02F2201/04 ,  G02F2201/127 ,  G02F2201/302 ,  G02F2201/307

    Abstract: An electrically controllable optical element comprising a piece of electro-optical material (3), having a surface on which a Bragg phase grating (7) having a longitudinal extension is provided, electrodes (15) which are arranged on said surface at both sides of the Bragg grating (7), and an optical fibre (5) comprising a core (9) and a cladding (11), having a portion of its longitudinal extension which is, at least in part of the fibre's circumference, free of the cladding (11), which has been partly removed such as to form a plane surface (13), wherein the fibre (5) is in optical contact with said piece of electro-optical material (3) such that its longitudinal extension matches with the longitudinal extension of the Bragg grating (7) and said portion which is free of the cladding (11) is adjacent to said surface where the Bragg grating (7) is provided, wherein a beam of optical radiation propagating along the said optical fibre (5) is controllable by means of a voltage applied to said electrodes (15). Thereby the diffraction characteristics of the interface between the Bragg grating (7) and the plane surface (13) of the core (9) pressed against the electro-optical substrate (3) is changed.

    Abstract translation: 一种电可控光学元件，包括一片电光材料（3），具有一表面，布置在其上的具有纵向延伸的布拉格相位光栅（7）;电极（15），其布置在 布拉格光栅（7）和包括芯（9）和包层（11）的光纤（5），其具有其纵向延伸部分的至少一部分，其至少部分纤维的圆周没有包层 （11），其被部分地去除以形成平面（13），其中所述纤维（5）与所述电光材料（3）光学接触，使得其纵向延伸部与纵向 布拉格光栅（7）的延伸部分和没有包层（11）的所述部分与设置布拉格光栅（7）的所述表面相邻，其中沿着所述光纤（5）传播的光辐射束 可以通过施加到sai上的电压来控制 d电极（15）。 因此，布拉格光栅（7）和压在电光基板（3）上的芯（9）的平面表面（13）之间的界面的衍射特性改变。

    DYNAMIC GAIN EQUALIZER
    55.
    发明公开
    DYNAMIC GAIN EQUALIZER 有权
    动态增益均衡器

    公开(公告)号：EP1371156A2

    公开(公告)日：2003-12-17

    申请号：EP02702694.7

    申请日：2002-03-08

    Applicant: Xtellus Inc.

    Inventor： COHEN, Gil ,  SUH, Seongwoo ,  COREM, Yossi

    IPC: H04B10/17 ,  G02F1/01 ,  G02F1/139

    CPC classification number: G02F1/1326 ,  G02B6/266 ,  G02F1/0115 ,  G02F1/134309 ,  G02F1/1396 ,  G02F1/2955 ,  G02F2201/04 ,  G02F2201/17 ,  G02F2203/48

    Abstract: A gain equalizer in which a multichannel input light signal is split into its separate wavelength components by means of a dispersive element such as a grating, and the spatially separated wavelength components are passed through a linear array of variable optical attenuators based on liquid crystal phase elements which modulate the phase of part of the cross section of the light. Other types of variable attenuators may also be used. The separate attenuated wavelength components are then recombined and output. The attenuation level of each variable optical attenuator is adjusted according to the output of the light as a function of its wavelength components, and in this way, the overall wavelength profile of the output light signal can be adjusted to any predefined form, whether a flattened spectral profile as in gain equalization applications, or a spectral compensating profile or a band blocking profile.

    FIBER OPTICAL ATTENUATOR
    56.
    发明公开
    FIBER OPTICAL ATTENUATOR 有权
    光纤衰减

    公开(公告)号：EP1370900A2

    公开(公告)日：2003-12-17

    申请号：EP02702695.4

    申请日：2002-03-08

    Applicant: Xtellus Inc.

    Inventor： COHEN, Gil

    IPC: G02F1/01 ,  G02F1/1333 ,  G02F1/139 ,  G02B6/26

    CPC classification number: G02F1/1326 ,  G02B6/266 ,  G02F1/0115 ,  G02F1/134309 ,  G02F1/1396 ,  G02F1/2955 ,  G02F2201/04 ,  G02F2201/17 ,  G02F2203/48

    Abstract: A fiber optical attenuator utilizing the cut-off phenomenon for single mode propagation of an optical wave down a single mode fiber, comprising an element such as a pixelated liquid crystal element, capable of spatially changing the phase across the cross section of an input optical signal. Such a spatial phase change is equivalent to a change in the mode structure of the propagating wave. The signal propagating in the single mode output fiber is attenuated in accordance with the extent to which higher order modes are mixed into the low order mode originally present. When the mode is completely transformed to higher order modes, the wave is effectively completely blocked from entering the output single-mode fiber, and the attenuation is high. The level of attenuation is determined by the fraction of the wave which is converted to modes other than the lowest order mode, and is thus controllable by the voltage applied to the pixels of the liquid crystal element.

    Fiber laser device
    59.
    发明专利
    Fiber laser device 有权
    光纤激光器件

    公开(公告)号：JP2011187791A

    公开(公告)日：2011-09-22

    申请号：JP2010052851

    申请日：2010-03-10

    Applicant: Fujikura Ltd ,  株式会社フジクラ

    Inventor： OBA YASUHIRO ,  NAKAI MICHIHIRO

    IPC: H01S3/06 ,  G02F1/35 ,  G02F1/37 ,  H01S3/0933

    CPC classification number: H01S3/06754 ,  G02F1/33 ,  G02F1/3526 ,  G02F1/37 ,  G02F2201/04 ,  G02F2201/307 ,  H01S3/0078 ,  H01S3/0092 ,  H01S3/0675 ,  H01S3/094076 ,  H01S3/10015 ,  H01S3/10046 ,  H01S3/10069 ,  H01S3/10092 ,  H01S3/1022 ,  H01S3/1068 ,  H01S3/1301 ,  H01S3/2375 ,  H01S3/302

    Abstract: PROBLEM TO BE SOLVED: To provide a fiber laser device capable of suppressing dispersion of a rising period of a laser beam to be output while shortening the rising period of the laser beam to be output. SOLUTION: This fiber laser device 100 includes a seed laser beam source 10, an excitation light source 20, an optical fiber 30 for amplification, a control part 60, and an output command part 65. When an output command is input to the control unit 60, the control unit 60 controls the seed laser beam source 10 and excitation light source 20 so that they are brought in a preliminary excitation state and an output state. In the preliminary excitation state, excitation light of an intensity defined based on the length of a period from an end point of the output state before the output command is input to the control part 60 to a point when the output command is input to the control part 60 is output from the excitation light source 20 for a certain period. In the output state, a laser beam is output from the seed laser beam source 10 so that the laser beam is output from an output part 50, and excitation light is output from the excitation light source 20. COPYRIGHT: (C)2011,JPO&INPIT

    Abstract translation: 解决的问题：提供能够抑制要输出的激光束的上升周期的色散的光纤激光器件，同时缩短要输出的激光束的上升周期。 解决方案：该光纤激光装置100包括种子激光束源10，激发光源20，用于放大的光纤30，控制部60和输出指令部65.当输出命令被输入到 控制单元60，控制单元60控制种子激光束源10和激发光源20使得它们处于预激励状态和输出状态。 在初步激励状态下，将基于从输出指令前的输出状态的终点的期间的长度定义的强度的激励光输入到控制部60，将输出指令输入到控制部60 部分60从激发光源20输出一段时间。 在输出状态下，从种子激光束源10输出激光，使得激光从输出部50输出，激发光从激发光源20输出。（C） 2011年，JPO＆INPIT

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