公开(公告)号：US20110141553A1

公开(公告)日：2011-06-16

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: H01S3/30 ,  H01S3/091

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。

公开(公告)号：US07787733B2

公开(公告)日：2010-08-31

申请号：US12231967

申请日：2008-09-08

Applicant: David John DiGiovanni ,  Yoshihiro Emori ,  Michael Fishteyn ,  Clifford Headley

Inventor： David John DiGiovanni ,  Yoshihiro Emori ,  Michael Fishteyn ,  Clifford Headley

IPC: G02B6/02 ,  G02B6/26

CPC classification number: G02B6/2804 ,  G02B6/02395 ,  G02B6/0365

Abstract: An optical transmission fiber is formed to include a relatively low-index, relatively thin outer cladding layer disposed underneath the protective polymer outer coating. Stray light propagating along an inner cladding layer(s) within the fiber will be refracted into the thin outer cladding (by proper selection of refractive index values). The thin dimension of the outer cladding layer allows for the stray light to “leak” into the outer coating in a controlled, gradual manner so as to minimize heating of the coating associated with the presence of stray light. The inventive fiber may also be bent to assist in the movement of stray light into the coating.

公开(公告)号：US20090092400A1

公开(公告)日：2009-04-09

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：US20090067795A1

公开(公告)日：2009-03-12

申请号：US12231967

申请日：2008-09-08

Applicant: David John DiGiovanni ,  Yoshihiro Emori ,  Michael Fishteyn ,  Clifford Headley

Inventor： David John DiGiovanni ,  Yoshihiro Emori ,  Michael Fishteyn ,  Clifford Headley

IPC: G02B6/02

CPC classification number: G02B6/2804 ,  G02B6/02395 ,  G02B6/0365

Abstract: An optical transmission fiber is formed to include a relatively low-index, relatively thin outer cladding layer disposed underneath the protective polymer outer coating. Stray light propagating along an inner cladding layer(s) within the fiber will be refracted into the thin outer cladding (by proper selection of refractive index values). The thin dimension of the outer cladding layer allows for the stray light to “leak” into the outer coating in a controlled, gradual manner so as to minimize heating of the coating associated with the presence of stray light. The inventive fiber may also be bent to assist in the movement of stray light into the coating.

Abstract translation: 光传输光纤被形成为包括设置在保护性聚合物外涂层下方的相对较低折射率的较薄的外包层。 沿着纤维内的内包层传播的杂散光将被折射入薄的外包层（通过适当地选择折射率值）。 外包层的薄的尺寸允许杂散光以受控的逐渐的方式“泄漏”到外涂层中，以便最小化与杂散光的存在相关联的涂层的加热。 本发明的纤维也可以被弯曲以帮助杂散光移动到涂层中。

公开(公告)号：US07400442B2

公开(公告)日：2008-07-15

申请号：US10645528

申请日：2003-08-22

Applicant: Shunichi Matsushita ,  Shu Namiki ,  Yoshihiro Emori

Inventor： Shunichi Matsushita ,  Shu Namiki ,  Yoshihiro Emori

IPC: H01S3/00

CPC classification number: H01S3/302 ,  H01S3/094003 ,  H01S3/094073 ,  H01S3/094096 ,  H01S3/2375 ,  H01S5/146

Abstract: 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.

Abstract translation: 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：US07248399B2

公开(公告)日：2007-07-24

申请号：US11326356

申请日：2006-01-06

Applicant: Yuki Taniguchi ,  Yoshihiro Emori ,  Ryuichi Sugizaki ,  Atsushi Oguri ,  Takeshi Yagi

Inventor： Yuki Taniguchi ,  Yoshihiro Emori ,  Ryuichi Sugizaki ,  Atsushi Oguri ,  Takeshi Yagi

IPC: H01S4/00 ,  H04B10/12

CPC classification number: G02B6/0281 ,  G02B6/02028 ,  G02B6/02242 ,  G02B6/02252 ,  G02B6/03627 ,  H01S3/06716 ,  H01S3/06725 ,  H01S3/06729 ,  H01S3/06758 ,  H01S3/06766 ,  H01S3/0677 ,  H01S3/06775 ,  H01S3/094003 ,  H01S3/302

Abstract: An optical fiber for Raman amplification amplifies a signal light with a pumping light. A chromatic dispersion at a wavelength of 1,550 nm is in a range between −70 ps/nm/km and −30 ps/nm/km. Raman gain efficiency with a pumping light of 1,450 nm is equal to or more than 5 (W×km)−1. Nonlinear coefficient at the wavelength of 1,550 nm is equal to or less than 5.0×10−9 W−1. Zero-dispersion wavelength is neither at a wavelength of the signal light nor at a wavelength of the pumping light. Cut-off wavelength is equal to or less than the wavelength of the pumping light.

Abstract translation: 用于拉曼放大的光纤利用泵浦光放大信号光。 波长为1,550nm的色散在-70ps / nm / km和-30ps / nm / km之间的范围内。 具有1,450nm的泵浦光的拉曼增益效率等于或大于5（Wxkm） ^{-1。 在1,550nm波长处的非线性系数等于或小于5.0×10 -9 W -1。 零色散波长既不在信号光的波长处，也不在泵浦光的波长处。 截止波长等于或小于泵浦光的波长。}

公开(公告)号：US07199919B2

公开(公告)日：2007-04-03

申请号：US10388463

申请日：2003-03-17

Applicant: Yoshihiro Emori ,  Shu Namiki ,  Junji Yoshida ,  Naoki Tsukiji

Inventor： Yoshihiro Emori ,  Shu Namiki ,  Junji Yoshida ,  Naoki Tsukiji

IPC: H01S4/00 ,  H04B10/12

CPC classification number: H01S3/302 ,  H01S3/09408 ,  H01S3/094096 ,  H01S3/10069 ,  H01S3/1022 ,  H01S3/131 ,  H01S2301/04

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 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.

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

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.

Abstract translation: 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

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。

公开(公告)号：US06411430B1

公开(公告)日：2002-06-25

申请号：US09587362

申请日：2000-06-02

Applicant: Atsushi Ogino ,  Masaru Fukushima ,  Yoshihiro Emori ,  Haruki Ogoshi ,  Yoshio Tashiro

Inventor： Atsushi Ogino ,  Masaru Fukushima ,  Yoshihiro Emori ,  Haruki Ogoshi ,  Yoshio Tashiro

IPC: H01S300

CPC classification number: H04B10/2941 ,  H01S3/06758 ,  H01S3/10023 ,  H01S3/1301 ,  H01S2301/06

Abstract: In an optical amplifier having a plurality of rare earth doped optical fibers in a multi-stage, there are provided one or more optical variable attenuator means, and an attenuation amount control means for changing an optical attenuation amount of the optical variable attenuator means on the basis of temperature of the rare earth doped optical fibers or an environmental temperature. In an optical amplifier having a plurality of rare earth doped optical fibers in a multi-stage, between the rare earth doped optical fibers, there are provided a replaceable optical part, one or more optical variable attenuator means, and an attenuation amount control means for changing an optical attenuation amount of the optical variable attenuator means on the basis of temperature of the rare earth doped optical fibers or an environmental temperature. In an optical amplifier having a plurality of rare earth doped optical fibers in a multi-stage, one or more externally controllable optical variable attenuator means are provided, and an optical attenuation amount of the optical variable attenuator means is varied with intensity of input optical signal to the optical amplifier and intensity of output optical signal from the optical amplifier.

Abstract translation: 在具有多级的多个稀土掺杂光纤的光放大器中，设置有一个或多个光可变衰减器装置和衰减量控制装置，用于将光可变衰减器装置的光衰减量改变为 稀土掺杂光纤的温度基准或环境温度。 在具有多级稀土掺杂光纤的光放大器中，在稀土掺杂光纤之间，设置有可更换的光学部件，一个或多个光可变衰减器装置，以及一个衰减量控制装置， 基于稀土掺杂光纤的温度或环境温度来改变光可变衰减器装置的光衰减量。 在具有多级的多个稀土掺杂光纤的光放大器中，提供一个或多个外部可控光可变衰减器装置，并且光​​可变衰减器装置的光衰减量随着输入光信号的强度而变化 到光放大器和来自光放大器的输出光信号的强度。