公开(公告)号：US08437074B2

公开(公告)日：2013-05-07

申请号：US13023301

申请日：2011-02-08

Applicant: Youichi Akasaka ,  Yoshihiro Emori ,  Shu Namiki

Inventor： Youichi Akasaka ,  Yoshihiro Emori ,  Shu Namiki

IPC: H04B10/17 ,  H01S3/0941 ,  H01S3/13

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：US20120027343A1

公开(公告)日：2012-02-02

申请号：US13269886

申请日：2011-10-10

Applicant: Koji IGARASHI ,  Shunichi Matsushita ,  Shu Namiki ,  Shigehiro Takasaka ,  Takashi Inoue ,  Hideaki Tobioka ,  Jiro Hiroishi

Inventor： Koji IGARASHI ,  Shunichi Matsushita ,  Shu Namiki ,  Shigehiro Takasaka ,  Takashi Inoue ,  Hideaki Tobioka ,  Jiro Hiroishi

IPC: G02B6/26

CPC classification number: H04B10/299 ,  G02F1/3513 ,  H04B10/25077

Abstract: An optical regeneration system for regenerating a degenerated signal light, comprising a regeneration device having at least one of a soliton converter, a pulse roller, a Kerr-shutter and a soliton purifier. The solilton converter uses an anomalaous-dispersion fiber (ADF) having a fiber length up to three times the soliton frequency, and the pulse roller is provided with a pulse roller fiber having high non-linear characteristics. The Kerr-shutter comprises an optical LO (local oscillation) generator for generating an optical LO on an OPLL (optical phase locked loop), a phase comparator for detecting the phase difference between an externally-input signal light and an optical LO, and a control unit for regulating the repeated frequency of an optical LO based on the phase difference. The soliton purifier has a soliton fiber disposed between two optical fibers.

Abstract translation: 一种用于再生退化信号光的光学再生系统，包括具有孤子转换器，脉冲辊，Kerr快门和孤子净化器中的至少一个的再生装置。 solilton转换器使用光纤长度高达孤子频率三倍的异常色散光纤（ADF），脉冲辊设有具有高非线性特性的脉冲辊光纤。 Kerr-shutter包括用于在OPLL（光锁相环）上产生光LO的光LO（本地振荡）发生器，用于检测外部输入信号光与光LO之间的相位差的相位比较器，以及 控制单元，用于基于相位差来调节光学LO的重复频率。 孤子净化器具有设置在两根光纤之间的孤子光纤。

公开(公告)号：US07769298B2

公开(公告)日：2010-08-03

申请号：US12238065

申请日：2008-09-25

Applicant: Koji Igarashi ,  Yoshihiro Emori ,  Atsushi Oguri ,  Shu Namiki ,  Osamu Aso ,  Masateru Tadakuma

Inventor： Koji Igarashi ,  Yoshihiro Emori ,  Atsushi Oguri ,  Shu Namiki ,  Osamu Aso ,  Masateru Tadakuma

IPC: H04B10/12

CPC classification number: G02F1/365 ,  G02F1/3513 ,  G02F2203/17 ,  G02F2203/26 ,  H01S5/0623 ,  H04B10/25077 ,  H04B10/291

Abstract: The present invention provides a pulse train generator comprising: a dual-frequency signal light source for generating a dual-frequency signal; a soliton shaper for soliton-shaping output light from the dual-frequency signal light source; and an adiabatic soliton compressor for performing adiabatic soliton compression on output light from the soliton shaper, and also provides a waveform shaper used in this pulse train generator, including a plurality of highly nonlinear optical transmission lines and a plurality of low-nonlinearity optical transmission lines which has a nonlinearity coefficient lower than that of the plurality of highly nonlinear optical transmission lines and which has a second-order dispersion value of which an absolute value is different from that of the plurality of highly nonlinear optical transmission lines. Further, the present invention provides a light source comprising a plurality of continuous light sources of which at least one oscillates in a multimode; a multiplexer for multiplexing output light from the continuous light sources; and a nonlinear phenomenon producer for producing a nonlinear phenomenon on output light from the multiplexer so as to suppress SBS (Stimulated Brillouin Scattering).

Abstract translation: 本发明提供一种脉冲串发生器，包括：用于产生双频信号的双频信号光源; 用于孤子整形的孤子整形器来自双频信号光源的输出光; 以及用于对来自孤子整形器的输出光进行绝热孤子压缩的绝热孤子压缩器，并且还提供在该脉冲串发生器中使用的波形整形器，包括多个高度非线性的光传输线和多个低非线性光传输线 其具有比多个高度非线性光传输线的非线性系数低的非线性系数，并且具有绝对值与多个高度非线性光传输线的绝对值不同的二阶色散值。 此外，本发明提供了一种光源，其包括至少一个以多模振荡的多个连续光源; 多路复用器，用于复用来自连续光源的输出光; 以及用于在来自多路复用器的输出光上产生非线性现象以抑制SBS（受激布里渊散射）的非线性现象产生器。

公开(公告)号：US07535629B2

公开(公告)日：2009-05-19

申请号：US11772956

申请日：2007-07-03

Applicant: Koji Fujimura ,  Misao Sakano ,  Takeshi Nakajima ,  Shu Namiki

Inventor： Koji Fujimura ,  Misao Sakano ,  Takeshi Nakajima ,  Shu Namiki

IPC: H01S3/00

CPC classification number: H04B10/2916 ,  H01S3/06725 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/06766 ,  H01S3/0677 ,  H01S3/094003 ,  H01S3/094011 ,  H01S3/094096 ,  H01S3/0941 ,  H01S3/1305 ,  H01S3/302 ,  H01S2301/04

Abstract: An apparatus, method and computer program product for controlling pumping light powers for a multiple-wavelength-pumped Raman amplifier that is pumped by pumping lights from a plurality of pumping light sources, by measuring gain wavelength characteristic or signal-power wavelength characteristic of the multiple-wavelength-pumped Raman amplifier using a plurality of photodetectors having different wavelength-sensitivity characteristics. The apparatus includes a determining unit that estimates a power of each of signal channels in a wavelength band for use based on values monitored by the photodetectors, and determines the pumping light powers using the power of each of the signal channels estimated. The determining unit estimates the power of each of the signal channels by performing an interpolation of the values monitored by the photodetectors.

Abstract translation: 一种用于控制多波长泵浦拉曼放大器的泵浦光功率的装置，方法和计算机程序产品，其通过从多个泵浦光源泵浦光来泵浦，通过测量多个泵浦光的增益波长特性或信号功率波长特性 波长泵浦的拉曼放大器，其使用具有不同波长敏感度特性的多个光电探测器。 该装置包括：确定单元，其基于由光电检测器监视的值来估计使用的波长带中的每个信号通道的功率，并且使用估计的每个信号通道的功率来确定泵浦光功率。 确定单元通过对由光电检测器监视的值进行插值来估计每个信号通道的功率。

公开(公告)号：US07206123B2

公开(公告)日：2007-04-17

申请号：US10935286

申请日：2004-09-08

Applicant: Yoshihiro Emori ,  Jake Bromage ,  Lynn E. Nelson ,  Shu Namiki

Inventor： Yoshihiro Emori ,  Jake Bromage ,  Lynn E. Nelson ,  Shu Namiki

IPC: H01S4/00 ,  H04B10/12

CPC classification number: H01S3/06754 ,  H01S3/0078 ,  H01S3/06758 ,  H01S3/094011 ,  H01S3/0941 ,  H01S3/10069 ,  H01S3/1305 ,  H01S3/302 ,  H04B10/2916

Abstract: A method, pump and Raman amplifier control an amount of stimulated Brillouin scattering (SBS) produced by the Raman amplifier pump so as to regulate a power penalty experienced by a receiver due to the SBS. A multi-mode semiconductor laser produces a multi-mode pump light having a dominate mode at a predetermined wavelength. At least a portion of the multi-mode pump light is coupled to a Raman gain medium in a forward pumping direction. A reflection sensor monitors reflected light that is at least partially reflected from said Raman gain medium. The reflection sensor has a passband characteristic that passes optical power of a dominate SBS peak of said reflected light, but suppresses other SBS peaks that are offset in wavelength from said dominate SBS peak. The optical power of the dominate SBS peak is compared to an optical power of the multi-mode pump light, and it is determined whether a result of the comparing step is above a predetermined threshold.

Abstract translation: 一种方法，泵浦和拉曼放大器控制由拉曼放大器泵产生的受激布里渊散射（SBS）的量，以便调节由于SBS而导致的接收器所经受的功率损失。 多模半导体激光器产生具有预定波长的主导模式的多模式泵浦光。 至少一部分多模式泵浦光在正向泵送方向上耦合到拉曼增益介质。 反射传感器监测至少部分地从所述拉曼增益介质反射的反射光。 反射传感器具有通过所述反射光的主要SBS峰值的光焦度的通带特性，但抑制了波长偏离所述主导SBS峰值的其他SBS峰值。 将主要SBS峰值的光功率与多模式泵浦光的光功率进行比较，并且确定比较步骤的结果是否高于预定阈值。

公开(公告)号：US20060204170A1

公开(公告)日：2006-09-14

申请号：US10516306

申请日：2003-06-11

Applicant: Koji Igarashi ,  Shunichi Matsushita ,  Shu Namiki ,  Shigerhiro Takasaka ,  Takashi Inoue ,  Hideaki Tobioka ,  Jiro Hiroishi

Inventor： Koji Igarashi ,  Shunichi Matsushita ,  Shu Namiki ,  Shigerhiro Takasaka ,  Takashi Inoue ,  Hideaki Tobioka ,  Jiro Hiroishi

IPC: G02B6/28

CPC classification number: H04B10/299 ,  G02F1/3513 ,  H04B10/25077

Abstract: An optical regeneration system for regenerating a degenerated signal light, comprising a regeneration device having at least one of a soliton converter, a pulse roller, a Kerr-shutter and a soliton purifier. The solilton converter uses an anomalaous-dispersion fiber (ADF) having a fiber length up to three times the soliton frequency, and the pulse roller is provided with a pulse roller fiber having high non-linear characteristics. The Kerr-shutter comprises an optical LO (local oscillation) generator for generating an optical LO on an OPLL (optical phase locked loop), a phase comparator for detecting the phase difference between an externally-input signal light and an optical LO, and a control unit for regulating the repeated frequency of an optical LO based on the phase difference. The soliton purifier has a soliton fiber disposed between two optical fibers.

Abstract translation: 一种用于再生退化信号光的光学再生系统，包括具有孤子转换器，脉冲辊，Kerr快门和孤子净化器中的至少一个的再生装置。 solilton转换器使用光纤长度高达孤子频率三倍的异常色散光纤（ADF），脉冲辊设有具有高非线性特性的脉冲辊光纤。 Kerr-shutter包括用于在OPLL（光锁相环）上产生光LO的光LO（本地振荡）发生器，用于检测外部输入信号光与光LO之间的相位差的相位比较器，以及 控制单元，用于基于相位差来调节光学LO的重复频率。 孤子净化器具有设置在两根光纤之间的孤子光纤。

公开(公告)号：US20060002715A1

公开(公告)日：2006-01-05

申请号：US11134275

申请日：2005-05-23

Applicant: Koji Igarashi ,  Yoshihiro Emori ,  Atsushi Oguri ,  Shu Namiki ,  Osamu Aso ,  Masateru Tadakuma

Inventor： Koji Igarashi ,  Yoshihiro Emori ,  Atsushi Oguri ,  Shu Namiki ,  Osamu Aso ,  Masateru Tadakuma

IPC: H04B10/00

CPC classification number: G02F1/365 ,  G02F1/3513 ,  G02F2203/17 ,  G02F2203/26 ,  H01S5/0623 ,  H04B10/25077 ,  H04B10/291

Abstract: The present invention provides a pulse train generator comprising: a dual-frequency signal light source for generating a dual-frequency signal; a soliton shaper for soliton-shaping output light from the dual-frequency signal light source; and an adiabatic soliton compressor for performing adiabatic soliton compression on output light from the soliton shaper, and also provides a waveform shaper used in this pulse train generator, including a plurality of highly nonlinear optical transmission lines and a plurality of low-nonlinearity optical transmission lines which has a nonlinearity coefficient lower than that of the plurality of highly nonlinear optical transmission lines and which has a second-order dispersion value of which an absolute value is different from that of the plurality of highly nonlinear optical transmission lines. Further, the present invention provides a light source comprising a plurality of continuous light sources of which at least one oscillates in a multimode; a multiplexer for multiplexing output light from the continuous light sources; and a nonlinear phenomenon producer for producing a nonlinear phenomenon on output light from the multiplexer so as to suppress SBS (Stimulated Brillouin Scattering).

Abstract translation: 本发明提供一种脉冲串发生器，包括：用于产生双频信号的双频信号光源; 用于孤子整形的孤子整形器来自双频信号光源的输出光; 以及用于对来自孤子整形器的输出光进行绝热孤子压缩的绝热孤子压缩器，并且还提供在该脉冲串发生器中使用的波形整形器，包括多个高度非线性的光传输线和多个低非线性光传输线 其具有比多个高度非线性光传输线的非线性系数低的非线性系数，并且具有绝对值与多个高度非线性光传输线的绝对值不同的二阶色散值。 此外，本发明提供了一种光源，其包括至少一个以多模振荡的多个连续光源; 多路复用器，用于复用来自连续光源的输出光; 以及用于在来自多路复用器的输出光上产生非线性现象以抑制SBS（受激布里渊散射）的非线性现象产生器。

公开(公告)号：US06977769B2

公开(公告)日：2005-12-20

申请号：US10062189

申请日：2002-01-30

Applicant: Shunichi Matsushita ,  Yoshihiro Emori ,  Shu Namiki

Inventor： Shunichi Matsushita ,  Yoshihiro Emori ,  Shu Namiki

IPC: G02F1/35 ,  H01S3/00 ,  H01S3/067 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/30

CPC classification number: H04B10/2916 ,  H01S3/005 ,  H01S3/0064 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/094011 ,  H01S3/094073 ,  H01S3/09408 ,  H01S3/0941 ,  H01S3/30 ,  H01S3/302

Abstract: Disclosed are: a pump light source device for Raman amplification for outputting a pump light for causing signal lightwaves introduced into an optical fiber to undergo Raman amplification therein, the device including two light sources, a polarization beam combiner or a polarization-maintaining optical beam coupler to which two lightwaves are input and which is adapted to combine and output these lightwaves, and a depolarizer adapted to depolarize and output the input lightwaves, wherein the lightwaves output from the two light sources are input to the polarization beam combiner or the polarization-maintaining optical beam coupler to output a combined composite lightwave, the composite lightwave being input to the depolarizer to output a lightwave with lower degree of polarization; and a Raman amplification system using the same.

Abstract translation: 公开了一种用于拉伸放大的泵浦光源装置，用于输出用于使引入光纤的信号光波进行拉曼放大的泵浦光，该装置包括两个光源，偏振光束组合器或偏振保持光束耦合器 其中输入两个光波并适于组合和输出这些光波;以及去偏振器，其适于去偏振和输出输入光波，其中从两个光源输出的光波输入到偏振光束组合器或偏振维持 光束耦合器输出组合的复合光波，复合光波被输入到去偏振器以输出具有较低偏振度的光波; 和使用其的拉曼放大系统。

公开(公告)号：US20050105165A1

公开(公告)日：2005-05-19

申请号：US10935286

申请日：2004-09-08

Applicant: Yoshihiro Emori ,  Jake Bromage ,  Lynn Nelson ,  Shu Namiki

Inventor： Yoshihiro Emori ,  Jake Bromage ,  Lynn Nelson ,  Shu Namiki

IPC: G02F1/35 ,  H01S3/00 ,  H01S3/06 ,  H01S3/067 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/13 ,  H01S3/131 ,  H01S3/30 ,  H04B10/17

CPC classification number: H01S3/06754 ,  H01S3/0078 ,  H01S3/06758 ,  H01S3/094011 ,  H01S3/0941 ,  H01S3/10069 ,  H01S3/1305 ,  H01S3/302 ,  H04B10/2916

Abstract: A method, pump and Raman amplifier control an amount of stimulated Brillouin scattering (SBS) produced by the Raman amplifier pump so as to regulate a power penalty experienced by a receiver due to the SBS. A multi-mode semiconductor laser produces a multi-mode pump light having a dominate mode at a predetermined wavelength. At least a portion of the multi-mode pump light is coupled to a Raman gain medium in a forward pumping direction. A reflection sensor monitors reflected light that is at least partially reflected from said Raman gain medium. The reflection sensor has a passband characteristic that passes optical power of a dominate SBS peak of said reflected light, but suppresses other SBS peaks that are offset in wavelength from said dominate SBS peak. The optical power of the dominate SBS peak is compared to an optical power of the multi-mode pump light, and it is determined whether a result of the comparing step is above a predetermined threshold.

Abstract translation: 一种方法，泵浦和拉曼放大器控制由拉曼放大器泵产生的受激布里渊散射（SBS）的量，以便调节由于SBS而导致的接收器所经受的功率损失。 多模半导体激光器产生具有预定波长的主导模式的多模式泵浦光。 至少一部分多模式泵浦光在正向泵送方向上耦合到拉曼增益介质。 反射传感器监测至少部分地从所述拉曼增益介质反射的反射光。 反射传感器具有通过所述反射光的主要SBS峰值的光焦度的通带特性，但抑制了波长偏离所述主导SBS峰值的其他SBS峰值。 将主要SBS峰值的光功率与多模式泵浦光的光功率进行比较，并且确定比较步骤的结果是否高于预定阈值。

公开(公告)号：US20050078352A1

公开(公告)日：2005-04-14

申请号：US10615187

申请日：2003-07-09

Applicant: Yoshihiro Emori ,  Shu Namiki

Inventor： Yoshihiro Emori ,  Shu Namiki

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

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。