公开(公告)号：US06542666B2

公开(公告)日：2003-04-01

申请号：US09804577

申请日：2001-03-12

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

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

IPC分类号： G02B634

CPC分类号： H01S3/067 ,  H01S3/10023

摘要： 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：US20090092400A1

公开(公告)日：2009-04-09

申请号：US12238065

申请日：2008-09-25

申请人： Koji IGARASHI ,  Yoshihiro Emori ,  Atsushi Oguri ,  Shu Namiki ,  Osamu Aso ,  Masateru Tadakuma

发明人： Koji IGARASHI ,  Yoshihiro Emori ,  Atsushi Oguri ,  Shu Namiki ,  Osamu Aso ,  Masateru Tadakuma

IPC分类号： H04B10/12

CPC分类号： G02F1/365 ,  G02F1/3513 ,  G02F2203/17 ,  G02F2203/26 ,  H01S5/0623 ,  H04B10/25077 ,  H04B10/291

摘要： 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).

摘要翻译： 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：US07400442B2

公开(公告)日：2008-07-15

申请号：US10645528

申请日：2003-08-22

申请人： Shunichi Matsushita ,  Shu Namiki ,  Yoshihiro Emori

发明人： Shunichi Matsushita ,  Shu Namiki ,  Yoshihiro Emori

IPC分类号： H01S3/00

CPC分类号： H01S3/302 ,  H01S3/094003 ,  H01S3/094073 ,  H01S3/094096 ,  H01S3/2375 ,  H01S5/146

摘要： An optical signal amplifier includes a light source, a depolarizer, and a gain medium that transfers energy from a pump beam output from the depolarizer to the optical signal. The depolarizer may include one or more birefringent optical fibers which support two polarization modes, a fast mode and a slow mode. The light propagates in the fast mode at a higher velocity than the light propagates in the slow mode so as to impart phase delay as the light propagates in the birefringent optical fibers, thereby at least partially depolarizing the beam. A method for using the amplifier with different types of transmission fibers enables the matching of depolarizers with relatively high percentage of degree of polarization, depending on fiber type, while staying below polarization dependent gain requirements.

摘要翻译： 光信号放大器包括光源，去偏振器和将从去偏振器输出的泵浦光束的能量传递到光信号的增益介质。 去极化器可以包括一种或多种支持两种偏振模式的双折射光纤，即快速模式和慢速模式。 光在快速模式下以比在慢速模式中传播的光速更高的速度传播，以便当光在双折射光纤中传播时给予相位延迟，从而至少部分地使光束去极化。 使用具有不同类型的传输光纤的放大器的方法使得取决于光纤类型的去偏振器的匹配度具有相对高百分比的偏振度，同时保持在偏振相关增益要求之下。

公开(公告)号：US07199919B2

公开(公告)日：2007-04-03

申请号：US10388463

申请日：2003-03-17

申请人： Yoshihiro Emori ,  Shu Namiki ,  Junji Yoshida ,  Naoki Tsukiji

发明人： Yoshihiro Emori ,  Shu Namiki ,  Junji Yoshida ,  Naoki Tsukiji

IPC分类号： H01S4/00 ,  H04B10/12

CPC分类号： H01S3/302 ,  H01S3/09408 ,  H01S3/094096 ,  H01S3/10069 ,  H01S3/1022 ,  H01S3/131 ,  H01S2301/04

摘要： 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 controlling the optical output and central wavelengths of tunable semiconductor laser devices. 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.

摘要翻译： 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。 泵浦源的可调性通过控制可调谐半导体激光器件的光输出和中心波长来实现。 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：US20050157379A1

公开(公告)日：2005-07-21

申请号：US11079301

申请日：2005-03-15

申请人： Yoshihiro Emori ,  Shu Namiki

发明人： Yoshihiro Emori ,  Shu Namiki

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

CPC分类号： H04B10/2916 ,  H01S3/06766 ,  H01S3/0677 ,  H01S3/09408 ,  H01S3/094096 ,  H01S3/10007 ,  H01S3/302 ,  H01S2301/04

摘要： 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.

摘要翻译： 在使用三个或更多个泵浦波长的拉曼放大器中，当在相邻波长之间具有最长间隔的激励波长的边界处将泵浦波长分成短波长侧组和长波长侧组时，短波长侧组 包括两个或更多个泵浦波长，其间具有基本等距的间隔，并且长波长侧组由两个或更少的泵浦波长构成。 当将一定的泵浦波长定义为第一通道时，分别从一定的泵浦波长朝向长波长侧彼此隔开约1THz的泵浦波长分别定义为第二至第n通道，泵浦光具有 对应于第一至第n通道的波长被多路复用，并且与所述多路复用泵浦光进一步多路复用具有与第n通道相隔离长波长侧2THz以上的波长的泵浦光， 光用作泵浦源。 对应于第（n-1）和（n-2）个通道以外的通道的所有波长的泵浦光彼此多路复用，并且所得到的泵浦光用作泵浦源。 与第（n-2）和（n-3）通道以外的通道相对应的所有波长的泵浦光彼此多路复用，并且所得到的泵浦光用作泵浦源。

公开(公告)号：US06882467B1

公开(公告)日：2005-04-19

申请号：US10615187

申请日：2003-07-09

申请人： Yoshihiro Emori ,  Shu Namiki

发明人： Yoshihiro Emori ,  Shu Namiki

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

CPC分类号： H04B10/2916 ,  H01S3/094011 ,  H01S3/302

摘要： 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.

摘要翻译： 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：US20100067099A1

公开(公告)日：2010-03-18

申请号：US12619455

申请日：2009-11-16

申请人： Youichi AKASAKA ,  Yoshihiro Emori ,  Shu Namiki

发明人： Youichi AKASAKA ,  Yoshihiro Emori ,  Shu Namiki

IPC分类号： H01S3/30 ,  H01S3/00

摘要： 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.

摘要翻译： 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。

公开(公告)号：US07072369B2

公开(公告)日：2006-07-04

申请号：US10820771

申请日：2004-04-09

申请人： Shunichi Matsushita ,  Shu Namiki ,  Yoshihiro Emori

发明人： Shunichi Matsushita ,  Shu Namiki ,  Yoshihiro Emori

IPC分类号： H01S3/13 ,  H01S3/30

CPC分类号： H01S5/146 ,  H01S3/094003 ,  H01S3/094073 ,  H01S3/302 ,  H01S5/06236

摘要： The present invention provides the following designing method: in a laser diode module or a depolarized laser diode module which has one laser diode and one polarization maintaining fiber connected to the output side thereof, the length of the polarization maintaining fiber is a value obtained by calculation of equation 37 with use of a longitudinal mode spacing Δλoutput light from the Fabry Perot (FP) laser diode, an oscillating center wavelength λ0 of the laser light, a beat length LBeat 1 of the polarization maintaining fiber and an optical wavelength λBeat used in the measurement of the LBeat 1. (Equation 37) L Pig

摘要翻译： 本发明提供以下设计方法：在激光二极管模块或去极化激光二极管模块中，其具有连接到其输出侧的一个激光二极管和一个偏振保持光纤，所述偏振保持光纤的长度是通过计算获得的值 使用来自法布里珀罗（FP）激光二极管的纵向模式间隔Deltalλ输出光，激光的振荡中心波长λ<0>，拍子长度L < / SUB>和用于测量L“Beat 1”的光波长λ。 （公式37）