公开(公告)号：US20050179990A1

公开(公告)日：2005-08-18

申请号：US11035321

申请日：2005-01-14

Applicant: Atsushi Oguri ,  Yoshihiro Emori ,  Shu Namiki

Inventor： Atsushi Oguri ,  Yoshihiro Emori ,  Shu Namiki

IPC: H01S3/10 ,  G02F1/35 ,  G02F1/39 ,  H01S3/00 ,  H01S3/067 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/13 ,  H01S3/131 ,  H01S3/30 ,  H04B10/07 ,  H04B10/29 ,  H04B10/296 ,  H04J14/00 ,  H04J14/02

CPC classification number: H01S3/06754 ,  G02F1/39 ,  H01S3/0064 ,  H01S3/094096 ,  H01S3/0941 ,  H01S3/1301 ,  H01S3/1305 ,  H01S3/302 ,  H04B10/2916

Abstract: A pumping light source unit for Raman amplification includes at least one pumping light source that outputs a first pumping light covering a current amplification band; at least one additional pumping light source that outputs a second pumping light covering an amplification band to be extended; and a setting control unit that controls a setting for a gain of an entire amplification band by resetting outputs of the first pumping light and the second pumping light. The pumping light source unit has a function of extending the amplification band in a stepwise manner.

Abstract translation: 用于拉曼放大的泵浦光源单元包括：至少一个泵浦光源，其输出覆盖电流放大带的第一泵浦光; 至少一个附加的泵浦光源，其输出覆盖要扩展的放大带的第二泵浦光; 以及设置控制单元，通过复位第一泵浦光和第二泵浦光的输出来控制整个放大频带的增益的设定。 泵浦光源单元具有以逐步方式延伸放大带的功能。

公开(公告)号：US06882468B2

公开(公告)日：2005-04-19

申请号：US10663829

申请日：2003-09-17

Applicant: Yoshihiro Emori ,  Shu Namiki

Inventor： Yoshihiro Emori ,  Shu Namiki

IPC: H01S3/094 ,  H01S3/23 ,  H01S3/30 ,  H04B10/291 ,  H01S3/00

CPC classification number: H04B10/2916 ,  H01S3/06766 ,  H01S3/0677 ,  H01S3/09408 ,  H01S3/094096 ,  H01S3/10007 ,  H01S3/302 ,  H01S2301/04

Abstract: In a Raman amplifier using three or more pumping wavelengths, when the pumping wavelengths are divided into a short wavelength side group and a long wavelength side group at the boundary of the pumping wavelength having the longest interval between the adjacent wavelengths, the short wavelength side group includes two or more pumping wavelengths having intervals therebetween which are substantially equidistant, and the long wavelength side group is constituted by two or less pumping wavelengths. When a certain pumping wavelength is defined as a first channel and pumping wavelengths which are spaced apart from each other by about 1 THz from the certain pumping wavelength toward a long wavelength side are defined as second to n-th channels, respectively, pump lights having wavelengths corresponding to the first to n-th channels are multiplexed, and pump light having a wavelength spaced apart from the n-th channel by 2 THz or more toward the long wavelength side is further multiplexed with the said multiplexed pump light, and resultant pump light is used as pump source. Pump lights of all of the wavelengths corresponding to the channels other than (n−1)th and (n−2)th channels are multiplexed with each other, and resultant pump light is used as pump source. Pump lights of all of the wavelengths corresponding to the channels other than (n−2)th and (n−3)th channels are multiplexed with each other, and resultant pump light is used as pump source.

公开(公告)号：US06775057B2

公开(公告)日：2004-08-10

申请号：US10120173

申请日：2002-04-11

Applicant: Youichi Akasaka ,  Yoshihiro Emori ,  Shu Namiki

Inventor： Youichi Akasaka ,  Yoshihiro Emori ,  Shu Namiki

IPC: H01S300

CPC classification number: H01S3/302 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/0912 ,  H01S3/094011 ,  H01S3/094015 ,  H01S3/094096 ,  H01S3/10007 ,  H01S3/10015 ,  H01S3/2375 ,  H01S3/2383 ,  H01S2301/04 ,  H04B10/2916

Abstract: A Raman amplifier according to the present invention comprises a plurality of pumping means using semiconductor lasers of Fabry-Perot, DFB, or DBR type or MOPAs, and pumping lights outputted from the pumping means have different central wavelengths, and interval between the adjacent central wavelength is greater than 6 nm and smaller than 35 nm. An optical repeater according to the present invention comprises the above-mentioned Raman amplifier and adapted to compensate loss in an optical fiber transmission line by the Raman amplifier. In a Raman amplification method according to the present invention, the shorter the central wavelength of the pumping light the higher light power of said pumping light. In the Raman amplifier according to the present invention, when a certain pumping wavelength is defined as a first channel, and second to n-th channels are defined to be arranged with an interval of about 1 THz toward a longer wavelength side, the pumping lights having wavelengths corresponding to the first to n-th channels are multiplexed, and an pumping light having a wavelength spaced apart from the n-th channel by 2 THz or more toward the longer wavelength side is combined with the multiplexed light, thereby forming the pumping light source. The pumping lights having wavelengths corresponding to the channels other than (n−1)-th and (n−2)-th channels may be multiplexed, thereby forming the pumping light source. The pumping lights having wavelengths corresponding to the channels other than (n−2)-th and (n−3)-th channels may be multiplexed, thereby forming the pumping light source.

公开(公告)号：US06768577B2

公开(公告)日：2004-07-27

申请号：US10097744

申请日：2002-03-15

Applicant: Benjamin J. Eggleton ,  Paul Steinvurzel ,  Yoshihiro Emori ,  Shu Namiki ,  Akira Fujisaki ,  Toshio Kimura

Inventor： Benjamin J. Eggleton ,  Paul Steinvurzel ,  Yoshihiro Emori ,  Shu Namiki ,  Akira Fujisaki ,  Toshio Kimura

IPC: H01S300

CPC classification number: H01S3/09415 ,  H01S3/094003 ,  H01S3/094069 ,  H01S3/302

Abstract: A tunable multimode wavelength division multiplex Raman pump and amplifier, and a system, method, and computer program product for controlling a tunable Raman pump and amplifier. The tunability of the pump source is accomplished by either straining or heating an external fiber grating, thereby causing a different wavelength of light to be emitted by the pump source. The system includes a microprocessor-based controller that monitors an amplifier's performance and adjusts the drive current and/or wavelength of the tunable pumps of an amplifier to achieve a target performance.

Abstract translation: 可调多模波分复用拉曼泵浦放大器，以及用于控制可调拉曼泵浦和放大器的系统，方法和计算机程序产品。 泵浦源的可调性是通过对外部光纤光栅进行应变或加热来实现的，从而导致不同波长的光被泵浦光源发射。 该系统包括基于微处理器的控制器，其监视放大器的性能并调节放大器的可调谐泵的驱动电流和/或波长以实现目标性能。

公开(公告)号：US06654162B2

公开(公告)日：2003-11-25

申请号：US09886212

申请日：2001-06-22

Applicant: Youichi Akasaka ,  Yoshihiro Emori ,  Shu Namiki

Inventor： Youichi Akasaka ,  Yoshihiro Emori ,  Shu Namiki

IPC: H01S330

CPC classification number: H01S3/302 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/0912 ,  H01S3/094011 ,  H01S3/094015 ,  H01S3/094096 ,  H01S3/10007 ,  H01S3/10015 ,  H01S3/2375 ,  H01S3/2383 ,  H01S2301/04 ,  H04B10/2916

Abstract: A Raman amplifier according to the present invention comprises a plurality of pumping means using semiconductor lasers of Fabry-Perot, DFB, or DBR type or MOPAs, and pumping lights outputted from the pumping means have different central wavelengths, and interval between the adjacent central wavelength is greater than 6 nm and smaller than 35 nm. An optical repeater according to the present invention comprises the above-mentioned Raman amplifier and adapted to compensate loss in an optical fiber transmission line by the Raman amplifier. In a Raman amplification method according to the present invention, the shorter the central wavelength of the pumping light the higher light power of said pumping light. In the Raman amplifier according to the present invention, when a certain pumping wavelength is defined as a first channel, and second to n-th channels are defined to be arranged with an interval of about 1 THz toward a longer wavelength side, the pumping lights having wavelengths corresponding to the first to n-th channels are multiplexed, and an pumping light having a wavelength spaced apart from the n-th channel by 2 THz or more toward the longer wavelength side is combined with the multiplexed light, thereby forming the pumping light source. The pumping lights having wavelengths corresponding to the channels other than (n−1)-th and (n−2)-th channels may be multiplexed, thereby forming the pumping light source. The pumping lights having wavelengths corresponding to the channels other than (n−2)-th and (n−3)-th channels may be multiplexed, thereby forming the pumping light source.

公开(公告)号：US06636344B2

公开(公告)日：2003-10-21

申请号：US09944601

申请日：2001-09-04

Applicant: Youichi Akasaka ,  Yoshihiro Emori ,  Shu Namiki

Inventor： Youichi Akasaka ,  Yoshihiro Emori ,  Shu Namiki

IPC: H01S310

CPC classification number: H01S3/302 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/0912 ,  H01S3/094011 ,  H01S3/094015 ,  H01S3/094096 ,  H01S3/10007 ,  H01S3/10015 ,  H01S3/2375 ,  H01S3/2383 ,  H01S2301/04 ,  H04B10/2916

Abstract: A Raman amplifier according to the present invention comprises a plurality of pumping means using semiconductor lasers of Fabry-Perot, DFB, or DBR type or MOPAs, and pumping lights outputted from the pumping means have different central wavelengths, and interval between the adjacent central wavelength is greater than 6 nm and smaller than 35 nm. An optical repeater according to the present invention comprises the above-mentioned Raman amplifier and adapted to compensate loss in an optical fiber transmission line by the Raman amplifier. In a Raman amplification method according to the present invention, the shorter the central wavelength of the pumping light the higher light power of said pumping light. In the Raman amplifier according to the present invention, when a certain pumping wavelength is defined as a first channel, and second to n-th channels are defined to be arranged with an interval of about 1 THz toward a longer wavelength side, the pumping lights having wavelengths corresponding to the first to n-th channels are multiplexed, and an pumping light having a wavelength spaced apart from the n-th channel by 2 THz or more toward the longer wavelength side is combined with the multiplexed light, thereby forming the pumping light source. The pumping lights having wavelengths corresponding to the channels other than (n−1)-th and (n−2)-th channels may be multiplexed, thereby forming the pumping light source. The pumping lights having wavelengths corresponding to the channels other than (n−2)-th and (n−3)-th channels may be multiplexed, thereby forming the pumping light source.

公开(公告)号：US06633697B2

公开(公告)日：2003-10-14

申请号：US09774026

申请日：2001-01-31

Applicant: Yoshihiro Emori ,  Shu Namiki

Inventor： Yoshihiro Emori ,  Shu Namiki

IPC: G02B626

CPC classification number: H04B10/2916 ,  H01S3/094011 ,  H01S3/302

Abstract: First pump light for Raman-amplifying optical signal is inputted to the output end of the optical signal, and second pump light used for Raman-amplifying the first pump light and having a wavelength shorter than that of the first pump light is inputted to the input end of the optical signal. The second pump light is also inputted to the output end of the optical signal. The first pump light is also inputted to the input end of the optical signal. The Raman amplification band of the second pump light is made not to be overlapped with that of the optical signal. The wavelength of the second pump light is shorter than that of the first pump light by the Raman shift of the amplifier fiber. The light source of either the first or second pump light or both the light sources of them are multiplex optical sources. The first pump light is emitted from a semiconductor laser. Third pump light for Raman-amplifying the second pump light is directed to an optical transmission line. The optical signal is transmitted through a transmission line using the Raman amplification method.

Abstract translation: 用于拉曼放大光信号的第一泵浦光被输入到光信号的输出端，并且用于拉曼放大第一泵浦光并且具有比第一泵浦光的波长短的波长的第二泵浦光被输入到输入 结束光信号。 第二泵浦光也被输入到光信号的输出端。 第一泵浦光也被输入到光信号的输入端。 第二泵浦光的拉曼放大频带不与光信号的拉曼放大频带重叠。 第二泵浦光的波长通过放大器光纤的拉曼偏移比第一泵浦光的波长短。 第一或第二泵浦光或其两个光源的光源是多路光源。 第一泵浦光从半导体激光器发射。 用于拉曼放大第二泵浦光的第三泵浦光被引导到光传输线。 光信号通过使用拉曼放大法的传输线传输

公开(公告)号：US06611370B2

公开(公告)日：2003-08-26

申请号：US09775632

申请日：2001-02-05

Applicant: Shu Namiki ,  Yoshihiro Emori ,  Mikio Ogai

Inventor： Shu Namiki ,  Yoshihiro Emori ,  Mikio Ogai

IPC: H01S330

CPC classification number: H04B10/2916 ,  H01S3/094003 ,  H01S3/094096 ,  H01S3/1312 ,  H01S3/2383 ,  H01S3/302 ,  H04B10/2942

Abstract: A Raman amplifier, system and method using a plurality of pumps configured to pump light into an optical fiber so as to Raman-amplify an optical signal propagating through the optical fiber. The Raman amplifier also includes an optical coupler configured to optically interconnect the pumping device with the optical fiber, and a control unit configured to control the pumping device so as to achieve a target amplification performance. Further, the control unit monitors the Raman-amplified WDM signal and determines if the monitored Raman-amplified WDM signal is within an allowable tolerance of the target amplification performance. If the Raman-amplified signal is not within the allowable tolerance, the control unit actively controls the pumps to bring the monitored Raman-amplified signal within the allowable tolerance of the target amplification profile.

Abstract translation: 一种拉曼放大器，使用多个泵的系统和方法，所述多个泵被配置为将光泵送到光纤中，以便对通过光纤传播的光信号进行拉曼放大。 所述拉曼放大器还包括被配置为将所述泵送装置与所述光纤互连的光耦合器，以及被配置为控制所述泵送装置以实现目标放大性能的控制单元。 此外，控制单元监视拉曼放大的WDM信号，并确定所监视的拉曼放大的WDM信号是否在目标放大性能的允许容限之内。 如果拉曼放大的信号不在允许的容限范围内，则控制单元主动地控制泵将被监测的拉曼放大信号置于目标放大曲线的允许容限之内。

公开(公告)号：US06542666B2

公开(公告)日：2003-04-01

申请号：US09804577

申请日：2001-03-12

Applicant: Toshiaki Tsuda ,  Shigehito Yodo ,  Kazuyo Mizuno ,  Yu Mimura ,  Toshihiko Ohta ,  Yoshihiro Emori ,  Shu Namiki

Inventor： Toshiaki Tsuda ,  Shigehito Yodo ,  Kazuyo Mizuno ,  Yu Mimura ,  Toshihiko Ohta ,  Yoshihiro Emori ,  Shu Namiki

IPC: G02B634

CPC classification number: H01S3/067 ,  H01S3/10023

Abstract: Wavelength multiplex transmission is realized in which the temperature dependency of an EDFA is compensated for in relation to the wavelengths which are used. A first and a second long-period grating which have different periods from each other are formed in an optical fiber, ensuring that the peak wavelength of a waveform representing an optical transmission loss characteristic of the first long-period grating side is located on the shorter wavelength side than a transmission band and a peak wavelength of a waveform representing an optical transmission loss characteristic of the second long-period grating side is located on the longer wavelength side within the transmission band.

公开(公告)号：US07692852B2

公开(公告)日：2010-04-06

申请号：US11689352

申请日：2007-03-21

Applicant: Youichi Akasaka ,  Yoshihiro Emori ,  Shu Namiki

Inventor： Youichi Akasaka ,  Yoshihiro Emori ,  Shu Namiki

IPC: H04B10/17

CPC classification number: H01S3/302 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/0912 ,  H01S3/094011 ,  H01S3/094015 ,  H01S3/094096 ,  H01S3/10007 ,  H01S3/10015 ,  H01S3/2375 ,  H01S3/2383 ,  H01S2301/04 ,  H04B10/2916

Abstract: A Raman amplifier according to the present invention comprises a plurality of pumping means using semiconductor lasers of Fabry-Perot, DFB, or DBR type or MOPAs, and pumping lights outputted from the pumping means have different central wavelengths, and interval between the adjacent central wavelength is greater than 6 nm and smaller than 35 nm. An optical repeater according to the present invention comprises the above-mentioned Raman amplifier and adapted to compensate loss in an optical fiber transmission line by the Raman amplifier. In a Raman amplification method according to the present invention, the shorter the central wavelength of the pumping light the higher light power of said pumping light. In the Raman amplifier according to the present invention, when a certain pumping wavelength is defined as a first channel, and second to n-th channels are defined to be arranged with an interval of about 1 THz toward a longer wavelength side, the pumping lights having wavelengths corresponding to the first to n-th channels are multiplexed, and an pumping light having a wavelength spaced apart from the n-th channel by 2 THz or more toward the longer wavelength side is combined with the multiplexed light, thereby forming the pumping light source. The pumping lights having wavelengths corresponding to the channels other than (n-1)-th and (n-2)-th channels may be multiplexed, thereby forming the pumping light source. The pumping lights having wavelengths corresponding to the channels other than (n-2)-th and (n-3)-th channels may be multiplexed, thereby forming the pumping light source.

Abstract translation: 根据本发明的拉曼放大器包括使用Fabry-Perot，DFB或DBR型或MOPA的半导体激光器的多个泵浦装置，并且从泵送装置输出的泵浦光具有不同的中心波长，并且相邻中心波长 大于6nm且小于35nm。 根据本发明的光中继器包括上述拉曼放大器，并且用于补偿拉曼放大器在光纤传输线路中的损耗。 在根据本发明的拉曼放大方法中，泵浦光的中心波长越短，所述泵浦光的光功率越高。 在根据本发明的拉曼放大器中，当将一定的泵浦波长定义为第一通道时，并且将第二至第n通道限定为朝向较长波长侧以大约1THz的间隔布置，泵浦灯 具有对应于第一至第n通道的波长的多路复用，并且将具有与第n个信道间隔开2波长或更长的波长朝向较长波长侧的波长的泵浦光与多路复用光组合，从而形成泵浦 光源。 具有与第（n-1）和（n-2）通道以外的通道对应的波长的泵浦光可以被多路复用，从而形成泵浦光源。 具有与第（n-2）和（n-3）通道以外的通道对应的波长的泵浦光可以被多路复用，从而形成泵浦光源。