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：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：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：US06198572B1

公开(公告)日：2001-03-06

申请号：US09362120

申请日：1999-07-28

申请人： Yasushi Sugaya ,  Susumu Kinoshita

发明人： Yasushi Sugaya ,  Susumu Kinoshita

IPC分类号： G01J328

CPC分类号： H01S3/06758 ,  H01S3/10015 ,  H01S3/1003 ,  H01S3/1301 ,  H01S2301/04 ,  H04B10/291 ,  H04B10/2912 ,  H04B10/2931 ,  H04B10/2942 ,  H04B10/296 ,  H04B2210/003 ,  H04J14/0221

摘要： An optical amplifying apparatus which includes an optical amplifier, an optical attenuator and a controller. The optical amplifier amplifies a light signal having a variable number of channels. The optical attenuator passes the amplified light signal and has a variable light transmissivity. Prior to varying the number of channels in the light signal, the controller varies the light transmissivity of the optical attenuator so that a power level of the amplified light signal is maintained at an approximately constant level that depends on the number of channels in the light signal prior to the varying the number of channels. While the number of channels in the light signal is being varied, the controller maintains the light transmissivity of the optical attenuator to be constant. Subsequent to varying the number of channels in the light signal, the controller varies the light transmissivity of the optical attenuator so that a power level of the amplified light signal is maintained at an approximately constant level that depends on the number of channels in the light signal subsequent to the varying the number of channels.

摘要翻译： 一种光放大装置，包括光放大器，光衰减器和控制器。 光放大器放大具有可变通道数的光信号。 光衰减器通过放大的光信号并具有可变的透光率。 在改变光信号中的通道数量之前，控制器改变光衰减器的透光率，使得放大的光信号的功率电平保持在大致恒定的水平，这取决于光信号中的通道数 在改变频道数之前。 虽然光信号中的信道数量正在变化，但是控制器保持光衰减器的光透射率是恒定的。 在改变光信号中的通道数量之后，控制器改变光衰减器的透光率，使得放大的光信号的功率电平保持在大致恒定的水平，这取决于光信号中的通道数 随后改变频道数量。

公开(公告)号：US5966237A

公开(公告)日：1999-10-12

申请号：US158571

申请日：1998-09-22

申请人： Yasushi Sugaya ,  Susumu Kinoshita

发明人： Yasushi Sugaya ,  Susumu Kinoshita

IPC分类号： H01S3/10 ,  G02B6/06 ,  H01S3/06 ,  H01S3/067 ,  H01S3/13 ,  H04B10/07 ,  H04B10/2525 ,  H04B10/2543 ,  H04B10/29 ,  H04B10/296 ,  H04B10/54 ,  H04B10/564 ,  H04B10/58 ,  H04J14/00 ,  H04J14/02 ,  H01S3/16 ,  H04B10/12

CPC分类号： H01S3/06758 ,  H01S3/1301 ,  H04B10/291 ,  H04B10/2912 ,  H04B10/2931 ,  H04B10/2942 ,  H04B10/296 ,  H04J14/0221 ,  H01S2301/04 ,  H01S3/10015 ,  H01S3/1003 ,  H04B2210/003

摘要： An optical amplifying apparatus which includes an optical amplifier, an optical attenuator and a controller. The optical amplifier amplifies a light signal having a variable number of channels. The optical attenuator passes the amplified light signal and has a variable light transmissivity. Prior to varying the number of channels in the light signal, the controller varies the light transmissivity of the optical attenuator so that a power level of the amplified light signal is maintained at an approximately constant level that depends on the number of channels in the light signal prior to the varying the number of channels. While the number of channels in the light signal is being varied, the controller maintains the light transmissivity of the optical attenuator to be constant. Subsequent to varying the number of channels in the light signal, the controller varies the light transmissivity of the optical attenuator so that a power level of the amplified light signal is maintained at an approximately constant level that depends on the number of channels in the light signal subsequent to the varying the number of channels.

公开(公告)号：US08320040B2

公开(公告)日：2012-11-27

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： 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输出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：US08004752B2

公开(公告)日：2011-08-23

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：US07474459B2

公开(公告)日：2009-01-06

申请号：US10235720

申请日：2002-09-06

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： H04B10/17 ,  H04B10/12

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光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， 以及将第二级光放大器的第二光输出保持在恒定功率水平的光学系统。 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：US07227681B2

公开(公告)日：2007-06-05

申请号：US10956107

申请日：2004-10-04

申请人： Yasushi Sugaya ,  Susumu Kinoshita

发明人： Yasushi Sugaya ,  Susumu Kinoshita

IPC分类号： H01S3/00

CPC分类号： H01S3/06758 ,  H01S3/10015 ,  H01S3/1003 ,  H01S3/1301 ,  H01S2301/04 ,  H04B10/291 ,  H04B10/2912 ,  H04B10/2931 ,  H04B10/2942 ,  H04B10/296 ,  H04B2210/003 ,  H04J14/0221

摘要： An optical amplifier which amplifies a wavelength division multiplexed (WDM) optical signal having a variable number of channels associated with different wavelengths and outputs the amplified WDM optical signal. The optical amplifier includes (a) an optical attenuator which controls a level of the amplified WDM optical signal, and (b) a controller which controls the WDM optical signal to be amplified with an approximately constant gain.

摘要翻译： 一种光放大器，其放大具有与不同波长相关联的可变数目的信道的波分复用（WDM）光信号并输出​​放大的WDM光信号。 光放大器包括：（a）控制放大的WDM光信号电平的光衰减器，（b）以大致恒定的增益控制WDM光信号进行放大的控制器。

公开(公告)号：US06891663B2

公开(公告)日：2005-05-10

申请号：US10219246

申请日：2002-08-16

申请人： Susumu Kinoshita ,  Yasushi Sugaya

发明人： Susumu Kinoshita ,  Yasushi Sugaya

IPC分类号： H01S3/067 ,  H01S3/094 ,  H01S3/131 ,  H01S3/23 ,  H04B3/04 ,  H04B10/07 ,  H04B10/2507 ,  H04B10/2525 ,  H04B10/2557 ,  H04B10/2563 ,  H04B10/29 ,  H04B10/294 ,  H04B10/297 ,  H01S3/00

CPC分类号： H04B10/2941 ,  H01S3/06704 ,  H01S3/06725 ,  H01S3/06758 ,  H01S3/094011 ,  H01S3/1301 ,  H01S3/2391 ,  H04B10/25133 ,  H04B10/296 ,  H04B10/2972 ,  H04B2210/256 ,  H04B2210/258

摘要： An optical amplifier, or optical repeater, for amplifying wavelength division multiplexed (WDM) light. A first demultiplexer demultiplexes the WDM light into first and second lights corresponding to different wavelengths in the WDM light. First and second optical amplifiers amplify the first and second lights, respectively. A first multiplexer multiplexes the amplified first and second lights into a multiplexed light. A dispersion compensator compensates for dispersion in the multiplexed light. A second demultiplexer demultiplexes the dispersion compensated, multiplexed light into the first and second lights. Third and fourth optical amplifiers amplify the demultiplexed first and second lights, respectively. A second multiplexer multiplexes the amplified first and second lights from the third and fourth optical amplifiers into a WDM light. The optical amplifier can be configured so that the first and second lights travel through the dispersion compensator in opposite directions.

摘要翻译： 用于放大波分复用（WDM）光的光放大器或光中继器。 第一解复用器将WDM光分解成对应于WDM光中的不同波长的第一和第二光。 第一和第二光放大器分别放大第一和第二灯。 第一多路复用器将放大的第一和第二光复用到复用光中。 色散补偿器补偿复用光中的色散。 第二解复用器将色散补偿的多路复用光解复用为第一和第二光。 第三和第四光放大器分别放大解复用的第一和第二光。 第二复用器将来自第三和第四光放大器的放大的第一和第二光复用到WDM光中。 光放大器可以被配置成使得第一和第二光沿相反方向行进通过色散补偿器。