公开(公告)号：US06771904B1

公开(公告)日：2004-08-03

申请号：US09705778

申请日：2000-11-06

申请人： Akira Sasaki ,  Shigeru Shikii ,  Hirokazu Ishimatsu ,  Naomi Oohashi ,  Katsuhiro Ishimura

发明人： Akira Sasaki ,  Shigeru Shikii ,  Hirokazu Ishimatsu ,  Naomi Oohashi ,  Katsuhiro Ishimura

IPC分类号： H04B1008

CPC分类号： H04B10/0775 ,  H04B2210/078

摘要： An optical transmission system according to the present invention includes a connection confirming circuit 106 for confirming connection of an input data signal, a test signal generator 105 for generating a test signal, and a switching device 107 on a transmitter side. The switching device 107 selectively generates the input data signal from an output terminal in the case where the input data signal is detected by the connection confirming circuit 106, and the test signal when the input data signal is not detected. An output of the switching device 107 is connected to an optical transmitter TX. On a receiver side, there is provided a determination circuit for receiving an optical signal from a transmission path and detecting the test signal to determine transmission characteristics of the transmission path on the basis of the test signal.

摘要翻译： 根据本发明的光传输系统包括用于确认输入数据信号的连接的连接确认电路106，用于产生测试信号的测试信号发生器105和发射机侧的切换装置107。 在连接确认电路106检测到输入数据信号的情况下，切换装置107从输出端子选择性地生成输入数据信号，并且当未检测到输入数据信号时，切换装置107选择性地生成输入数据信号。 开关装置107的输出连接到光发射机TX。 在接收机侧，提供了一种确定电路，用于从传输路径接收光信号，并根据测试信号检测测试信号以确定传输路径的传输特性。

公开(公告)号：US06236500B1

公开(公告)日：2001-05-22

申请号：US09338794

申请日：1999-06-23

申请人： Mikiya Suzuki ,  Toshio Nakamura ,  Akira Sasaki ,  Shigeru Shikii

发明人： Mikiya Suzuki ,  Toshio Nakamura ,  Akira Sasaki ,  Shigeru Shikii

IPC分类号： H01S300

CPC分类号： H04B10/294 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/2383 ,  H04B2210/258 ,  H04J14/0221

摘要： There is provided an optical amplifier for reducing the optical output power difference and/or obtaining high output power across a wide wavelength band. The optical amplifier comprises a plurality of optical amplifier units connected in two or more stages. At least one of the optical amplifier units comprises a first optical component of a single input and N outputs that has an optical-demultiplexing function, and P units of optical amplification means for the individual amplification of light that is output from P (where 1≦P≦N) output terminals selected from the N (integer) output terminals of the first optical component. Second optical components are provided to the input side of the first optical component or between the output side of the first optical component and the input side of the optical amplification means. The second optical components are optical components having chromatic dispersion compensation functions, optical components having functions designed to compensate for wavelength dependency output power difference, or optical components demonstrating other required effects. The optical components are DCFs, FBGs, SMFs, optical filters, attenuators, or the like. The second optical components are provided nonselectively or selectively.

摘要翻译： 提供了一种用于减小光输出功率差和/或在宽波段上获得高输出功率的光放大器。 光放大器包括以两级或更多级连接的多个光放大器单元。 光放大器单元中的至少一个包括单输入的第一光学部件和具有光解复用功能的N个输出，以及用于从P输出的光的单独放大的光放大装置的P单元（其中， = P <= N）个输出端子，从第一光学部件的N（整数）输出端子中选择。 第二光学部件被提供到第一光学部件的输入侧或者在第一光学部件的输出侧和光学放大装置的输入侧之间。 第二光学部件是具有色散补偿功能的光学部件，具有被设计为补偿波长依赖性输出功率差的功能的光学部件，或表现出其它所需效果的光学部件。 光学部件是DCF，FBG，SMF，光学滤波器，衰减器等。 非选择性地或选择地提供第二光学部件。

公开(公告)号：US06313938B1

公开(公告)日：2001-11-06

申请号：US09437224

申请日：1999-11-10

申请人： Shigeru Shikii ,  Akira Sasaki

发明人： Shigeru Shikii ,  Akira Sasaki

IPC分类号： H01S300

CPC分类号： H01S3/06754 ,  H01S3/005 ,  H01S3/0064 ,  H01S3/094011 ,  H01S3/09415

摘要： Provided is a planar lightwave circuit module in which the required optical components constituting an optical fiber amplifier and representing components other than amplifying optical fibers are formed into a unitary structure on a common substrate. This planar lightwave circuit module comprises signal light input ports, signal light output ports, and first and second connection ports. The first connection port is connected to the signal light output ports and to one end of an amplifying optical fiber. The second connection port is connected to the signal light input ports and to the other end of the amplifying optical fiber. Optical coupling means for feeding pumping light from an pumping source to the amplifying optical fiber are also provided in the form of waveguides or in integrated form. Amplifying optical fibers are connected from the outside to the first and second connection ports of this planar lightwave circuit module, yielding an optical fiber amplifier.

摘要翻译： 提供了一种平面光波电路模块，其中构成光纤放大器的所需光学部件并且代表放大光纤以外的部件，在共同的基板上形成为一体的结构。 该平面光波电路模块包括信号光输入端口，信号光输出端口以及第一和第二连接端口。 第一连接端口连接到信号光输出端口和放大光纤的一端。 第二连接端口连接到信号光输入端口和放大光纤的另一端。 用于将来自泵浦源的泵浦光馈送到放大光纤的光耦合装置也以波导形式或集成形式提供。 放大光纤从外部连接到该平面光波电路模块的第一和第二连接端口，产生光纤放大器。

公开(公告)号：US06400497B1

公开(公告)日：2002-06-04

申请号：US08555901

申请日：1995-11-13

申请人： Mikiya Suzuki ,  Shigeru Shikii ,  Yukihiro Ozeki ,  Shusei Aoki

发明人： Mikiya Suzuki ,  Shigeru Shikii ,  Yukihiro Ozeki ,  Shusei Aoki

IPC分类号： H04B1016

CPC分类号： H04B10/2941 ,  H01S3/06758 ,  H01S2301/04 ,  H04B10/291 ,  H04B10/2912

摘要： An EDFA 1 is comprised of a pre-amp 2 and a post-amp 3, which are connected in series, a photocoupler 4, a long wave pass filter (LWPF) 5 and an LWPF controller 6. The photocoupler 4 is connected to an input-stage of the EDFA 1 and enters the light signal in the LWPF controller 6. The LWPF 5 is located between the pre-amp 2 and the post-amp 3, and its cutoff wavelength is adjustable. A short-wavelength-part of the light signal which is amplified by the pre-amp 2, is cut off by the LWPF 5. The LWPF controller 6 detects an input signal power of the input light signal and adjusts the cutoff wavelength of the LWPF 5 based on the detected input signal power. Gain of light signals which are output from the post-amp 3, are equalized ranging the extensive input signal power and covering wide signal-wavelength bands.

摘要翻译： EDFA 1包括串联连接的前置放大器2和后置放大器3，光电耦合器4，长波通滤波器（LWPF）5和LWPF控制器6.光电耦合器4连接到 EDFA 1的输入级，并将光信号输入到LWPF控制器6中.LWPF 5位于前置放大器2和后置放大器3之间，其截止波长可调。 由前置放大器2放大的光信号的短波长部分被LWPF5切断.LWPF控制器6检测输入光信号的输入信号功率并调节LWPF的截止波长 5基于检测到的输入信号功率。 从后置放大器3输出的光信号的增益被均衡到广泛的输入信号功率和覆盖宽的信号波长带。

公开(公告)号：US06313941B1

公开(公告)日：2001-11-06

申请号：US09518175

申请日：2000-03-02

申请人： Mikiya Suzuki ,  Shigeru Shikii

发明人： Mikiya Suzuki ,  Shigeru Shikii

IPC分类号： H01S300

CPC分类号： H01S3/06754 ,  H01S3/0078 ,  H01S3/10015 ,  H01S3/10023 ,  H01S3/1301 ,  H01S2301/02

摘要： An optical amplifier that can easily cope with alteration of characteristics and whereby a prescribed characteristic can be obtained in a stable fashion. In an optical amplifier, a plurality of optical components including optical amplification media that amplify input signal light are cascade-connected. There are provided (1) a temperature adjustment member capable of changing the temperature of one or a plurality of optical components in accordance with a temperature control signal that is input, and (2) a characteristic control device that supplies in respect of the temperature adjustment member a control signal that controls a prescribed optical characteristic having temperature dependence in one or a plurality of optical components that are the subject of adjustment by the temperature adjustment member, being a prescribed optical characteristic that is demanded for the optical amplifier.

摘要翻译： 一种能够容易地应对特性变化并由此能够以稳定的方式获得规定特性的光放大器。 在光放大器中，包括放大输入信号光的光放大介质的多个光学部件被级联连接。 提供（1）能够根据输入的温度控制信号来改变一个或多个光学部件的温度的温度调节部件，以及（2）关于温度调节的特性控制装置 构成控制信号，其控制作为温度调节构件调节对象的一个​​或多个光学部件中具有温度依赖性的规定光学特性，作为光放大器所要求的规定的光学特性。

公开(公告)号：US20050031356A1

公开(公告)日：2005-02-10

申请号：US10667057

申请日：2003-09-22

申请人： Mikiya Suzuki ,  Shigeru Shikii

发明人： Mikiya Suzuki ,  Shigeru Shikii

IPC分类号： G02B6/00 ,  H01S3/042 ,  H01S3/06 ,  H04B10/02 ,  H04B10/16 ,  H04B10/17 ,  H04B10/28 ,  H04J14/00 ,  H04J14/02 ,  H04B10/12

CPC分类号： H04B10/2941 ,  G02B6/2937

摘要： An optical module 1 comprises an inlet side optical fiber, an optical filter optically connected to the inlet side optical fiber, and an outlet side optical fiber optically connected to the optical filter, wherein, the optical filter comprises a gain-slope compensation optical filter to flatten a gain slope (dG/dλ, where G:gain, λ:wavelength)of a gain of an optical amplifier connected to the inlet side optical fiber or the outlet side optical fiber. An optical amplifying module comprises an optical amplifier with the above-mentioned optical module 1. An optical transmission system comprises the optical module 1, an optical amplifier and an optical branching means, wherein FDM (Frequency Division Multiplexing) signal is branched and transmitted.

摘要翻译： 光学模块1包括入口侧光纤，光学连接到入口侧光纤的光学滤波器和与光学滤波器光学连接的出口侧光纤，其中，滤光器包括增益斜率补偿滤光器， 使连接到入口侧光纤或出射侧光纤的光放大器的增益的增益斜率（dG / dlambda，其中G：增益，λ：波长）变平。 光放大模块包括具有上述光模块1的光放大器。光传输系统包括光模块1，光放大器和光分路装置，其中FDM（频分复用）信号被分支和传输。

公开(公告)号：US06344924B1

公开(公告)日：2002-02-05

申请号：US09299019

申请日：1999-04-26

申请人： Mikiya Suzuki ,  Shigeru Shikii

发明人： Mikiya Suzuki ,  Shigeru Shikii

IPC分类号： G02B610

CPC分类号： H04B10/296 ,  H01S3/06758 ,  H01S3/1608 ,  H01S2301/04

摘要： Optical fiber amplifiers with a simple composition than can accurately flatten optical output power in a fixed range are provided. Main optical amplifiers and first gain equalizers connected to these amplifiers are disposed between input port and output port. The main optical amplifiers comprise first EDFs which function as first amplification optical fibers, pumping light sources for providing pumping to drive the first EDFs using amplification characteristics, and second isolators. It is preferable for the second isolators to be isolators that can eliminate optical pumping power. The first gain equalizers are comprised by second absorption EDF. This second EDF operates such that the gain of the optical signal decreases in a non-pumping state or in a slight pumping state. The amplification characteristics used by the first EDF to amplify the optical signal power are opposite to the absorption characteristics used by the second EDF to absorb the optical signal power. Therefore, by means of passing a Wavelength Division Multiplexing Signal (WDM) through the first and second EDFs, only the portion of the Wavelength Division Multiplexing Signal (WDM) output from the first EDF that corresponds to the signal amplified by the first EDF is absorbed while a Wavelength Division Multiplexing Signal (WDM) passes through the second EDF. Because of this, the gain of the Wavelength Division Multiplexing Signal (WDM) ultimately output from an optical fiber amplifier is flattened.

摘要翻译： 提供了具有简单组合的光纤放大器，可以将固定范围内的光输出功率精确地平坦化。 连接到这些放大器的主光放大器和第一增益均衡器设置在输入端口和输出端口之间。 主要的光放大器包括用作第一放大光纤的第一EDF，泵浦光源以提供泵浦以使用放大特性来驱动第一EDF和第二隔离器。 优选地，第二隔离器是可以消除光泵浦功率的隔离器。 第一增益均衡器由第二吸收EDF组成。 该第二EDF操作使得光信号的增益在非泵送状态或在轻微的泵送状态下减小。 第一EDF用于放大光信号功率的放大特性与由第二EDF用于吸收光信号功率的吸收特性相反。 因此，借助于通过第一EDF和第二EDF的波分复用信号（WDM），只有从第一EDF输出的对应于由第一EDF放大的信号的波分复用信号（WDM）的部分被吸收 而波分复用信号（WDM）通过第二EDF。 因此，最终从光纤放大器输出的波分复用信号（WDM）的增益变平。