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50 条记录 (耗时 0.044 秒)

    Optical transmitter and optical transmission system
    23.
    发明授权
    Optical transmitter and optical transmission system 失效
    光发射机和光传输系统

    公开(公告)号：US06661974B1

    公开(公告)日：2003-12-09

    申请号：US09407369

    申请日：1999-09-28

    申请人： Yuichi Akiyama ,  George Ishikawa ,  Hiroki Ooi ,  Terumi Chikama

    发明人： Yuichi Akiyama ,  George Ishikawa ,  Hiroki Ooi ,  Terumi Chikama

    IPC分类号： H04J1402

    CPC分类号： H04J14/02 ,  H04B10/2513 ,  H04B2210/254 ,  H04J14/0221

    摘要： An optical transmitter having a function which compensates for wavelength dispersion is provided with a plurality of light sources for outputting light having wavelengths that differ from one another. Before the optical transmission system begins operating, the wavelength of light output to an optical transmission line is varied by changing over the light sources in order to detect a wavelength whose transmission characteristic is optimum with regard to wavelength dispersion exhibited by this optical transmission line. During system operation, the light having the detected optimum wavelength is output to the optical transmission line.

    摘要翻译： 具有补偿波长色散的功能的光发射机设置有用于输出具有彼此不同的波长的光的多个光源。 在光传输系统开始工作之前，通过改变光源来改变输出到光传输线的光的波长，以便检测相对于该光传输线所表现出的波长色散的透射特性最佳的波长。 在系统操作期间，将具有检测到的最佳波长的光输出到光传输线。

    Optical amplifier, excitation light source control method for use in optical amplifier, and optical amplifier control method
    24.
    发明授权
    Optical amplifier, excitation light source control method for use in optical amplifier, and optical amplifier control method 有权

    公开(公告)号：US06631026B2

    公开(公告)日：2003-10-07

    申请号：US10227268

    申请日：2002-08-26

    申请人： Susumu Kinoshita ,  Terumi Chikama

    发明人： Susumu Kinoshita ,  Terumi Chikama

    IPC分类号： H01S300

    CPC分类号： H04B10/296 ,  H01S3/094003 ,  H04B10/291 ,  H04B10/294 ,  H04J14/0221

    摘要： In an optical amplifier for use in, for example, a wavelength multiplexing optical communication system, in order to allow an excitation light source to be enlargeable or removable in accordance with an increase/decrease in the number of channels in signal light even if the optical communication system is in operation, there are included an optical amplifying section (2) for amplifying and outputting inputted signal light, a plurality of excitation light sources (3, 4) and an excitation light source control section (5) for controlling operations of the excitation light sources (3, 4), wherein the excitation light sources are composed of a main excitation light source (3) and an auxiliary excitation light source (4), and the excitation light source control section (5) is equipped with a control section (7) which, when the number of channels in the inputted signal light is equal to or less than a predetermined number of channels, executes control whereby the main excitation light source (3) supplies excitation light and which executes control whereby the main excitation light source (3) and the auxiliary excitation light source (4) cooperatively supply excitation light when the number of channels in the signal light is more than the predetermined number of channels.

    Gain equalizer which includes a plurality of optical filters for equalizing the gain of an optical amplifier
    26.
    发明授权
    Gain equalizer which includes a plurality of optical filters for equalizing the gain of an optical amplifier 失效
    增益均衡器，其包括用于均衡光放大器的增益的多个滤光器

    公开(公告)号：US06807376B2

    公开(公告)日：2004-10-19

    申请号：US09960403

    申请日：2001-09-24

    申请人： Naomasa Shimojoh ,  Takafumi Terahara ,  Terumi Chikama

    发明人： Naomasa Shimojoh ,  Takafumi Terahara ,  Terumi Chikama

    IPC分类号： H04B1012

    CPC分类号： H04B10/2941 ,  H01S3/10023 ,  H01S3/1312 ,  H01S2301/04 ,  H04B10/2942 ,  H04J14/0221

    摘要： A gain equalizer which equalizes gain versus wavelength characteristics of an optical amplifier. The gain versus wavelength characteristics of the optical amplifier include first, second and third gain peaks in a wavelength band with the second gain peak being between the first and third gain peaks. The optical amplifier amplifies an input signal in accordance with the gain versus wavelength characteristics to produce an output signal. The gain equalizer includes first, second and third optical filters having first, second and third transparency characteristics, respectively. The first, second and third transparency characteristics are periodic waveforms having different periods related to the wavelength difference between the first and third gain peaks. The second transparency characteristic is a periodic waveform having a period equal to 1/(2n) of the period of the waveform of the first transparency characteristic. The third transparency characteristic is a periodic waveform having a period equal to ¼ of the period of the waveform of the first transparency characteristic. For example, the first transparency characteristic is a periodic waveform with ¼ period extending between the first and third gain peaks, the second transparency characteristic is a periodic waveform with one period extending between the first and third gain peaks, and the third transparency characteristic is a periodic waveform with two periods extending between the first and third gain peaks.

    摘要翻译： 增益均衡器，其均衡光放大器的增益对波长特性。 光放大器的增益对波长特性包括波长带中的第一，第二和第三增益峰值，第二增益峰值在第一和第三增益峰值之间。 光放大器根据增益对波长特性来放大输入信号以产生输出信号。 增益均衡器包括分别具有第一，第二和第三透明特性的第一，第二和第三滤光器。 第一，第二和第三透明度特征是具有与第一和第三增益峰值之间的波长差有关的不同周期的周期性波形。 第二透明度特性是周期等于第一透明特性的波形周期的1 /（2 ）的周期波形。 第三透明特性是周期等于第一透明特性的波形周期的1/4的周期波形。 例如，第一透明特性是在第一和第三增益峰之间延伸的1/4周期的周期波形，第二透明特性是周期性波形，其中一个周期在第一和第三增益峰之间延伸，第三透明特性是 具有在第一和第三增益峰之间延伸的两个周期的周期性波形。

    Optical amplifier for use in optical communications equipment
    27.
    发明授权
    Optical amplifier for use in optical communications equipment 失效
    用于光通信设备的光放大器

    公开(公告)号：US06373623B1

    公开(公告)日：2002-04-16

    申请号：US09677759

    申请日：2000-10-03

    申请人： Chihiro Ohshima ,  Susumu Kinoshita ,  Terumi Chikama

    发明人： Chihiro Ohshima ,  Susumu Kinoshita ,  Terumi Chikama

    IPC分类号： H01S300

    CPC分类号： H01S3/06704 ,  G02F1/093 ,  H01S3/06754 ,  H01S3/094003 ,  H01S3/09408 ,  H01S5/40

    摘要： The output level of pumping light supplied from a pumping light source is varied using a variable attenuator, which is controlled by a variable attenuator driver circuit. By separating a portion containing the pumping light source from a portion containing an amplification medium, it becomes possible to prevent heat emitted by the pumping light source from adversely affecting the amplification medium. By arranging the portion containing the pumping light source such that a pumping light source or sources can be added when necessary, optical transmission system requirements of having more pumping light sources for system upgrade can be accommodated readily. By packaging portions containing amplification media, an optical amplifier can be made small.

    摘要翻译： 从泵浦光源提供的泵浦光的输出电平使用由可变衰减器驱动电路控制的可变衰减器来改变。 通过从包含放大介质的部分分离含有泵浦光源的部分，可以防止由泵浦光源发出的热量对放大介质产生不利影响。 通过布置包含泵浦光源的部分，使得在必要时可以添加泵浦光源或源，可容易地适应具有用于系统升级的更多泵浦光源的光传输系统要求。 通过封装包含放大介质的部分，可以使光放大器变小。

    Optical amplifier for use in optical communications equipment
    28.
    发明授权
    Optical amplifier for use in optical communications equipment 失效

    公开(公告)号：US06335823B2

    公开(公告)日：2002-01-01

    申请号：US09769532

    申请日：2001-01-26

    申请人： Chihiro Ohshima ,  Susumu Kinoshita ,  Terumi Chikama

    发明人： Chihiro Ohshima ,  Susumu Kinoshita ,  Terumi Chikama

    IPC分类号： H01S301

    CPC分类号： H01S3/094003 ,  H01S3/06704 ,  H01S3/09408

    摘要： The output level of pumping light supplied from a pumping light source is varied using a variable attenuator, which is controlled by a variable attenuator driver circuit. By separating a portion containing the pumping light source from a portion containing an amplification medium, it becomes possible to prevent heat emitted by the pumping light source from adversely affecting the amplification medium. By arranging the portion containing the pumping light source such that a pumping light source or sources can be added when necessary, optical transmission system requirements of having more pumping light sources for system upgrade can be accommodated readily. By packaging portions containing amplification media, an optical amplifier can be made small.

    Optical transmission device for bi-directional optical communication
    29.
    发明授权
    Optical transmission device for bi-directional optical communication 失效
    用于双向光通信的光传输设备

    公开(公告)号：US06278536B1

    公开(公告)日：2001-08-21

    申请号：US09044127

    申请日：1998-03-19

    申请人： Yutaka Kai ,  Terumi Chikama

    发明人： Yutaka Kai ,  Terumi Chikama

    IPC分类号： H04J1402

    CPC分类号： H04J14/0291 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0206 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0216 ,  H04J14/0221 ,  H04J14/0283

    摘要： This invention discloses an optical transmission device used for bi-directional optical communications. The optical transmission device comprises a uni-directional optical signal processing unit for performing specified optical signal processing for optical signals transmitted in a single direction and a uni-direction/bi-direction changing unit for unifying the flows of clockwise and counterclockwise optical signals in a single direction, inputting these flow-unified optical signals to the uni-directional optical signal processing unit and dividing the flow of optical signals from the uni-directional optical signal processing unit between clockwise and counterclockwise directions. Bi-directional wavelength-division multiplexing optical communications can be performed by unifying the transmission routes (flows) of optical signals transmitted in two ways in a single direction and using the existing optical transmission device for uni-directional optical communications.

    摘要翻译： 本发明公开了一种用于双向光通信的光传输设备。 光传输装置包括：单向光信号处理单元，用于对单向传输的光信号进行特定的光信号处理;以及单向/双向改变单元，用于将顺时针和逆时针光信号的流量统一在 将这些流统一的光信号输入到单向光信号处理单元，并将来自单向光信号处理单元的光信号的流在顺时针和逆时针方向上分开。 双向波分复用光通信可以通过使用现有的用于单向光通信的光传输装置统一单向传输的光信号的传输路由（流）。

    MULTI-WAVELENGTH LIGHT AMPLIFIER
    30.
    发明申请
    MULTI-WAVELENGTH LIGHT AMPLIFIER 有权
    多波长光放大器

    公开(公告)号：US20110262140A1

    公开(公告)日：2011-10-27

    申请号：US13177065

    申请日：2011-07-06

    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： H04J14/02

    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，具有放大从第一级光输出的第一光的第二光放大光纤的第二级光放大器 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。