公开(公告)号：US6055092A

公开(公告)日：2000-04-25

申请号：US655027

申请日：1996-05-28

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： G02F1/35 ,  H01S3/06 ,  H01S3/067 ,  H01S3/07 ,  H01S3/10 ,  H01S3/13 ,  H01S3/131 ,  H04J14/02 ,  H04B10/12 ,  G02B6/26 ,  H01S3/30

CPC分类号： H04B10/296 ,  H01S3/06754 ,  H01S3/06758 ,  H01S2301/04 ,  H01S3/10015 ,  H01S3/1301 ,  H04J14/0221

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.

公开(公告)号：US5701195A

公开(公告)日：1997-12-23

申请号：US658944

申请日：1996-05-31

申请人： Terumi Chikama

发明人： Terumi Chikama

IPC分类号： H04B10/2507 ,  H04B10/07 ,  H04B10/293 ,  H04B10/40 ,  H04B10/50 ,  H04B10/60 ,  H04B10/67 ,  H01S3/00

CPC分类号： H04B10/675 ,  H04B10/67 ,  H04B10/673

摘要： In a light signal reception apparatus having a light surge eliminating function and provided in an optical transmission system, the apparatus of the present invention can effectively eliminate a light surge accidentally included in a light signal. The apparatus includes: an optical amplifying unit for receiving a light signal and amplifying it to a predetermined level; an optical filtering unit operatively connected to the optical amplifying unit for eliminating the light surge and passing through the light signal; an opto-electrical converting unit operatively connected to the optical filtering unit for converting the light signal to an electrical signal; and a monitoring unit operatively connected to the optical amplifying unit for monitoring a fluctuation of the light signal, and controlling a transmission wavelength characteristic of the optical filtering unit or a wavelength of the light signal in order to eliminate the light surge.

摘要翻译： 在具有光消除功能并设置在光传输系统中的光信号接收装置中，本发明的装置可以有效地消除光信号中意外包含的光浪涌。 该装置包括：光放大单元，用于接收光信号并将其放大到预定电平; 光学滤波单元，可操作地连接到光放大单元，用于消除光浪涌并通过光信号; 光电转换单元，可操作地连接到光学滤波单元，用于将光信号转换成电信号; 以及监控单元，可操作地连接到光放大单元，用于监视光信号的波动，并且控制光学滤波单元的透射波长特性或光信号的波长，以消除光浪涌。

公开(公告)号：US20090225403A1

公开(公告)日：2009-09-10

申请号：US12410027

申请日：2009-03-24

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： H01S3/00

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。

公开(公告)号：US07224517B2

公开(公告)日：2007-05-29

申请号：US10086742

申请日：2002-03-04

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： H01S3/00

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，具有放大从第一级输出的第一光输出的第二光放大光纤的第二级光放大器 光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。

公开(公告)号：US06507431B1

公开(公告)日：2003-01-14

申请号：US09264903

申请日：1999-03-09

申请人： Yasushi Sugaya ,  Terumi Chikama

发明人： Yasushi Sugaya ,  Terumi Chikama

IPC分类号： H04B1017

CPC分类号： H04B10/2942 ,  H04B10/077 ,  H04B10/07955 ,  H04B10/291 ,  H04B10/2912 ,  H04B10/2931 ,  H04B10/2935 ,  H04B10/296 ,  H04J14/0221

摘要： Multi-wavelength light is transmitted from a sending station to a receiving station. An erbium-doped optical fiber is installed on the transmission path that connects the sending station and the receiving station. Pump light is supplied from a light source installed in the receiving station to the erbium-doped optical fiber. In the receiving station, the multi-wavelength light is decomposed into the component wavelength signals. The light level of each component wavelength signal is detected, and the power of the light emitted by the light source is controlled so as to equalize those light levels.

摘要翻译： 多波长光从发送站发送到接收站。 掺铒光纤安装在连接发送站和接收站的传输路径上。 泵浦光从安装在接收站的光源供给到掺铒光纤。 在接收站中，多波长光分解为分量波长信号。 检测每个分量波长信号的光级，并且控制由光源发射的光的功率以使这些光电平相等。

公开(公告)号：US06496300B2

公开(公告)日：2002-12-17

申请号：US09093410

申请日：1998-06-09

申请人： Susumu Kinoshita ,  Miki Onaka ,  Yasushi Sugaya ,  Chihiro Ohshima ,  Terumi Chikama ,  Hiroyuki Itou ,  Tadashi Okiyama ,  Taiki Kobayashi

发明人： Susumu Kinoshita ,  Miki Onaka ,  Yasushi Sugaya ,  Chihiro Ohshima ,  Terumi Chikama ,  Hiroyuki Itou ,  Tadashi Okiyama ,  Taiki Kobayashi

IPC分类号： H04B1017

CPC分类号： H04B10/2941 ,  H01S3/06758 ,  H04B2210/003 ,  H04J14/0221

摘要： An optical amplifier of a wavelength-division multiplexing transmission system that includes a pre-stage optical amplifying unit and a post stage optical amplifying unit. The pre-stage optical amplifying unit has a rare-earth element doped optical fiber and a pump light source for inputting a pump light to the rare-earth element doped optical fiber. The post-stage optical amplifying unit has a second rare-earth element doped optical fiber and a pump light source for inputting a pump light to the second rare-earth element doped optical fiber. The pre-stage optical amplifying unit and the post-stage optical amplifying unit are optically connected by a detachable optical coupling device. In addition, a gain equalizing unit, positioned on an output side of the optical fibers, compensates for wavelength-dependency of a gain characteristic of the optical fibers.

摘要翻译： 一种包括前级光放大单元和后级光放大单元的波分复用传输系统的光放大器。 前级光放大单元具有稀土元素掺杂光纤和用于将泵浦光输入到稀土元素掺杂光纤的泵浦光源。 后级光放大单元具有第二稀土元素掺杂光纤和用于将泵浦光输入到第二稀土元素掺杂光纤的泵浦光源。 前级光放大单元和后级光放大单元通过可拆卸光耦合装置光学连接。 此外，位于光纤的输出侧的增益均衡单元补偿光纤的增益特性的波长依赖性。

公开(公告)号：US06411411B1

公开(公告)日：2002-06-25

申请号：US09186151

申请日：1998-11-05

申请人： Kazue Okazaki ,  Terumi Chikama

发明人： Kazue Okazaki ,  Terumi Chikama

IPC分类号： H04J1402

CPC分类号： H04J14/0221 ,  H04J14/0209 ,  H04J14/0212

摘要： An optical wavelength selective control apparatus has a plurality of wavelength selective optical filters connected to one another to extract an optical signal at an arbitrary wavelength from wavelength division multiplexed signals according to a frequency signal for selecting a wavelength, and a frequency oscillator for outputting a signal at a frequency corresponding to a wavelength of the optical signal to be extracted to each of the wavelength selective optical filters as a frequency signal for selecting a wavelength, thereby performing a wavelength selecting process highly accurately with the wavelength selective optical filter.

摘要翻译： 光波长选择控制装置具有多个波长选择性滤光器，它们根据用于选择波长的频率信号从波分复用信号中提取任意波长的光信号，以及用于输出信号的频率振荡器 以对应于要提取到每个波长选择滤光器的光信号的波长的频率作为用于选择波长的频率信号，从而使用波长选择滤光器高精度地进行波长选择处理。

公开(公告)号：US06400499B2

公开(公告)日：2002-06-04

申请号：US09761710

申请日：2001-01-18

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： H04B1012

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.

公开(公告)号：US06366379B1

公开(公告)日：2002-04-02

申请号：US09087497

申请日：1998-05-29

申请人： Takafumi Terahara ,  Terumi Chikama

发明人： Takafumi Terahara ,  Terumi Chikama

IPC分类号： H04B1000

CPC分类号： H04J14/021 ,  H04B10/077 ,  H04B10/07955 ,  H04J14/02 ,  H04J14/0206 ,  H04J14/0212 ,  H04J14/0213

摘要： A remote control device of an acousto-optic tunable filter includes an acousto-optic tunable filter, a surface acoustic wave control signal source and a control unit. The acousto-optic tunable filter receives an output light signals from an optical transmission line and has a control port to control and outputs state of the light signal received from the optical transmission line, based on a surface acoustic wave control signal received through the control port. The surface acoustic wave control signal source generates the surface acoustic wave control signal and is provided at a remote place from the acousto-optic tunable filter. The control unit receives information regarding the surface acoustic wave control signal generated by the surface acoustic wave control signal source and supplies the surface acoustic wave control signal to the control port of the acousto-optic tunable filter.

摘要翻译： 声光可调谐滤波器的遥控装置包括声光可调谐滤波器，声表面波控制信号源和控制单元。 声光可调谐滤波器接收来自光传输线的输出光信号，并且具有控制端口，用于基于通过控制端口接收的表面声波控制信号来控制和输出从光传输线接收的光信号的状态 。 表面声波控制信号源产生声表面波控制信号，并且设置在距离声光可调滤波器的远处。 控制单元接收由声表面波控制信号源产生的表面声波控制信号的信息，并将声表面波控制信号提供给声光调节滤波器的控制端口。

公开(公告)号：US06292289B1

公开(公告)日：2001-09-18

申请号：US09492458

申请日：2000-01-27

申请人： Yasushi Sugaya ,  Terumi Chikama

发明人： Yasushi Sugaya ,  Terumi Chikama

IPC分类号： H01S300

CPC分类号： H04B10/291 ,  H04B10/0775 ,  H04B10/0777 ,  H04B10/2972 ,  H04B2210/078 ,  H04B2210/258

摘要： The present invention relates to a method for transmitting a supervisory optical signal. A first optical amplifier for a first band (e.g., a conventional band: C band) determining a noise characteristic and a gain efficiency is provided. A second optical amplifier for a second band (e.g., a long wavelength band: L band) determining a noise characteristic and a gain efficiency is provided. The supervisory optical signal is processed in relation to one of the first and second optical amplifiers superior in at least one of the noise characteristic and the gain efficiency to the other. According to this method, undue degradation in the noise characteristic and the gain efficiency can be prevented to maintain a good transmission quality of a main signal.

摘要翻译： 本发明涉及发送监控光信号的方法。 提供了用于确定噪声特性和增益效率的第一频带（例如，常规频带：C频带）的第一光放大器。 提供了用于确定噪声特性和增益效率的第二频带（例如，长波段：L波段）的第二光放大器。 监控光信号相对于第一和第二光放大器中的一个被处理，在至少一个噪声特性和增益效率中优于另一个。 根据该方法，可以防止噪声特性和增益效率的不适当的劣化，以保持主信号的良好的传输质量。