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    Optical transmission system
    2.
    发明公开
    Optical transmission system 有权
    光传输系统

    公开(公告)号：EP2267923A1

    公开(公告)日：2010-12-29

    申请号：EP10183485.1

    申请日：2005-12-14

    申请人： FUJITSU LIMITED

    发明人： Miura, Akira ,  Nakamura, Kentaro ,  Onaka, Hiroshi ,  Akiyama, Yuichi ,  Ooi, Hiroki ,  Rasmussen, Jens C. ,  Hoshida, Takeshi

    IPC分类号： H04B10/155

    CPC分类号： G02F1/0123 ,  G02F1/2255 ,  H04B10/505 ,  H04B10/5051 ,  H04B10/5053 ,  H04B10/50575 ,  H04B10/50577 ,  H04B10/50597 ,  H04B10/58

    摘要： A data modulator unit (10) generates a DQPSK optical signal in accordance with a data signal. A phase shift unit (19) provides a phase difference of π/2 between a pair of arms (11, 12) . A photodetector (31) converts an output signal of the data modulator unit (10) into an electrical signal. A filler (32) is a low-pass filter with a cut-off frequency lower than a symbol frequency, and filters an output signal of the photodetector (31) . A monitor unit (33) detects power of an output signal of the filter (32). A phase difference control unit (34) adjusts the amount of phase shift in the phase shift unit (19) so as to minimize power of an output signal of the filter (32).

    摘要翻译： 数据调制器单元（10）根据数据信号产生DQPSK光信号。 相移单元（19）在一对臂（11,12）之间提供π/ 2的相位差。 光电检测器（31）将数据调制器单元（10）的输出信号转换为电信号。 填充器（32）是截止频率低于符号频率的低通滤波器，对光检测器（31）的输出信号进行滤波。 监视器单元（33）检测滤波器（32）的输出信号的功率。 相位差控制单元（34）调整相移单元（19）中的相移量以使滤波器（32）的输出信号的功率最小化。

    Method and device for optical amplification and system having the device
    6.
    发明公开
    Method and device for optical amplification and system having the device 失效
    方法和装置用于光学放大和系统，其包括这样的装置

    公开(公告)号：EP0897205A2

    公开(公告)日：1999-02-17

    申请号：EP98100013.6

    申请日：1998-01-02

    申请人： FUJITSU LIMITED

    发明人： Takeda, Miki ,  Kinoshita, Susumu ,  Onaka, Hiroshi

    IPC分类号： H01S3/06 ,  H04B10/17

    CPC分类号： H04B10/291 ,  H01S3/0078 ,  H01S3/0675 ,  H01S3/06758 ,  H01S3/094096 ,  H01S3/10015 ,  H01S3/10023 ,  H01S3/1301 ,  H01S2301/04 ,  H04B10/2912 ,  H04B10/2941 ,  H04B10/2942 ,  H04B2210/003

    摘要： A device comprising an optical amplifier including an optical amplifying medium, and first and second optical filters operatively connected to the optical amplifier to suppress the wavelength dependence of gain. The medium has an input end and an output end for an optical signal. The medium is pumped so that it provides a gain band. The gain band includes a first band giving a relatively high gain and noise figure to the optical signal and a second band giving a relatively low gain and noise figure to the optical signal. The first optical filter is connected to the input end of the medium and has characteristics such that the first optical filter suppresses the wavelength dependence of gain in the second band. The second optical filter is connected to the output end of the medium and has characteristics such that the second optical filter suppresses the wavelength dependence of gain in the first band. This configuration allows suitable suppression of the wavelength dependence of gain in each optical filter, thereby providing a low noise figure and high optical output power.

    摘要翻译： 光学放大器的一种装置，包括包括光放大介质上，并且第一和第二光学滤波器可操作地连接到光放大器来抑制增益的波长依赖性。 该介质具有输入端和输出在光信号以结束。 介质泵所以没有提供捆绑的增益。 增益带包括：第一带给出相对高的增益和噪声系数的光信号和第二带给出相对低的增益和噪声系数的光信号。 第一滤光器被连接到所述介质的输入端，并已检查特性所做的第一光学滤波器抑制所述第二带增益的波长依赖性。 所述第二滤光器被连接到所述介质的输出端，并已检查特性所做的第二光学滤波器抑制所述第一带增益的波长依赖性。 这种配置允许增益在每个滤光器的波长依赖性的合适的抑制，从而提供了低噪声指数和高输出光功率。

    An optical transmission apparatus and an optical wavelength multiplex network therewith
    8.
    发明公开
    An optical transmission apparatus and an optical wavelength multiplex network therewith 审中-公开
    一种用于在顺序光传输和光波分复用网络

    公开(公告)号：EP1443695A2

    公开(公告)日：2004-08-04

    申请号：EP04001662.8

    申请日：2004-01-27

    申请人： FUJITSU LIMITED

    发明人： Miyata, Hideyuki ,  Tomofuji, Hiroaki ,  Onaka, Hiroshi ,  Takeno, Minoru

    IPC分类号： H04J14/02

    CPC分类号： H04J14/0294 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0206 ,  H04J14/021 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/022 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0283 ,  H04J14/0284

    摘要： A double-ring optical wavelength multiplex network is disclosed, which includes multiple optical transmission apparatuses that can reduce the unit cost of initially installing a small optical network while providing the flexibility to expand. For multiplexed optical signals arriving at a node, the optical transmission apparatus "drops" selected wavelengths for local delivery and "passes" others for continued transmission on the network. For optical signals originating ("added") at the node, the optical transmission apparatus wavelength multiplexes the "added" signals with the "passing" signals for transmission on the network. For "added" signals, the optical transmission apparatus blocks "passing" signals of the same wavelength.

    摘要翻译： 一种双环光波长复用网络是游离缺失盘，其包括多个光学发送装置确实可以减少首次安装的小型光学网络，同时提供灵活地扩展的单位成本。 对于到达一个节点多路复用光信号，该光传输装置“滴”选择用于局部递送和“通过”其他网络上继续传输波长。 用于在所述节点处的光信号源自（“添加”），光学传输设备波长与“通过”信号用于网络上的传输复用“添加”的信号。 对于“添加”信号时，光传输装置的块“通过”相同波长的信号。

    Variable wavelength light source and optical amplifier using same
    10.
    发明公开
    Variable wavelength light source and optical amplifier using same 有权
    可变光源的波长和光放大器使用相同的

    公开(公告)号：EP1359686A2

    公开(公告)日：2003-11-05

    申请号：EP03002139.8

    申请日：2003-01-31

    申请人： FUJITSU LIMITED

    发明人： Onaka, Miki ,  Hayashi, Etsuko ,  Onaka, Hiroshi

    IPC分类号： H04B10/155

    CPC分类号： G02B26/0808 ,  H01S3/094096 ,  H01S3/1055 ,  H01S3/302 ,  H01S5/02284 ,  H01S5/0687 ,  H01S5/143 ,  H01S5/4012 ,  H01S5/4062 ,  H01S5/4087 ,  H04B10/506 ,  H04B10/572

    摘要： It is an object of the present invention to provide a variable wavelength light source apparatus capable of changing continuously wavelengths of a plurality of oscillation light over a wideband and an optical amplifier using the same. In order to achieve the above object, the variable wavelength light source apparatus comprises: a wavelength selection device in which a propagation direction of emitted light is changed according to a wavelength of incident light; a plurality of light sources emitting the light that has reciprocated in a gain medium with a high reflecting mirror on an end face thereof and has been amplified, to a predetermined position of the wavelength selection device at angles different from each other; an optical resonance reflection section reflecting a part of the light incident vertically out of the emitted light from the wavelength selection device to form an optical resonator configuration between the optical resonance reflection section and each of the high reflecting mirrors of the light sources to generate oscillation light; an optical coupler section coupling the oscillation light transmitted through the optical resonance reflection section in an output light path; and a drive section changing an arrangement angle of the wavelength selection device with respect to the optical resonance reflection section according to desired wavelength setting.

    摘要翻译： 它是本发明的一个目的是提供一种能够在宽的频带和使用相同的光放大器改变振荡光的多个连续波长的波长可变光源装置。 为了实现上述目的，波长可变光源装置，包括：在所射出的光的传播方向雅丁于入射的光的波长变化的波长选择装置; 光源发射在增益介质具有往复运动具有高反射镜上端面和光的多元被放大，以波长选择装置的预定位置在离海誓山盟不同的角度; 到光学谐振反射部反射的光入射的一部分垂直地出从波长选择设备所发射的光，以形成在所述光谐振反射部之间的光学谐振器结构中，每个高反射的光源来产生振荡光的反射镜的 ; 到光学耦合器部分耦合的振荡光的反式通过在光输出路径中的光学谐振反射部mitted; 和驱动部件中的波长选择装置的排列角度的变化相对于所述光学谐振反射部gemäß到所期望的波长的设置。