公开(公告)号：US20050105165A1

公开(公告)日：2005-05-19

申请号：US10935286

申请日：2004-09-08

申请人： Yoshihiro Emori ,  Jake Bromage ,  Lynn Nelson ,  Shu Namiki

发明人： Yoshihiro Emori ,  Jake Bromage ,  Lynn Nelson ,  Shu Namiki

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

CPC分类号： H01S3/06754 ,  H01S3/0078 ,  H01S3/06758 ,  H01S3/094011 ,  H01S3/0941 ,  H01S3/10069 ,  H01S3/1305 ,  H01S3/302 ,  H04B10/2916

摘要： 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.

摘要翻译： 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

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：US06825972B2

公开(公告)日：2004-11-30

申请号：US09950779

申请日：2001-09-13

申请人： Yoshihiro Emori ,  Shu Namiki

发明人： Yoshihiro Emori ,  Shu Namiki

IPC分类号： H01S300

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.

公开(公告)号：US06646787B2

公开(公告)日：2003-11-11

申请号：US10266742

申请日：2002-10-09

申请人： Youichi Akasaka ,  Yoshihiro Emori ,  Shu Namiki

发明人： Youichi Akasaka ,  Yoshihiro Emori ,  Shu Namiki

IPC分类号： H01S300

CPC分类号： 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

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.

公开(公告)号：US06501593B2

公开(公告)日：2002-12-31

申请号：US09886211

申请日：2001-06-22

申请人： Youichi Akasaka ,  Yoshihiro Emori ,  Shu Namiki

发明人： Youichi Akasaka ,  Yoshihiro Emori ,  Shu Namiki

IPC分类号： H01S300

CPC分类号： 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

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 a 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 have wavelengths corresponding to the channels 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 具有与第1〜第n个通道对应的波长被多路复用，并且将具有与第n个通道间隔开2波长以上的波长朝向较长波长侧的波长的泵浦光与复用光结合，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。 泵浦光具有与第（n-2）和第（n-3）个通道相对应的通道的波长可以被多路复用，从而形成泵浦光源。

公开(公告)号：US06292288B1

公开(公告)日：2001-09-18

申请号：US09527748

申请日：2000-03-17

申请人： Youichi Akasaka ,  Yoshihiro Emori ,  Shu Namiki

发明人： Youichi Akasaka ,  Yoshihiro Emori ,  Shu Namiki

IPC分类号： H01S300

CPC分类号： 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

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：US07787733B2

公开(公告)日：2010-08-31

申请号：US12231967

申请日：2008-09-08

申请人： David John DiGiovanni ,  Yoshihiro Emori ,  Michael Fishteyn ,  Clifford Headley

发明人： David John DiGiovanni ,  Yoshihiro Emori ,  Michael Fishteyn ,  Clifford Headley

IPC分类号： G02B6/02 ,  G02B6/26

CPC分类号： G02B6/2804 ,  G02B6/02395 ,  G02B6/0365

摘要： 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：US20090067795A1

公开(公告)日：2009-03-12

申请号：US12231967

申请日：2008-09-08

申请人： David John DiGiovanni ,  Yoshihiro Emori ,  Michael Fishteyn ,  Clifford Headley

发明人： David John DiGiovanni ,  Yoshihiro Emori ,  Michael Fishteyn ,  Clifford Headley

IPC分类号： G02B6/02

CPC分类号： G02B6/2804 ,  G02B6/02395 ,  G02B6/0365

摘要： 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.

摘要翻译： 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：US07248399B2

公开(公告)日：2007-07-24

申请号：US11326356

申请日：2006-01-06

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

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

IPC分类号： H01S4/00 ,  H04B10/12

CPC分类号： 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

摘要： 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.

摘要翻译： 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：US06411430B1

公开(公告)日：2002-06-25

申请号：US09587362

申请日：2000-06-02

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

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

IPC分类号： H01S300

CPC分类号： H04B10/2941 ,  H01S3/06758 ,  H01S3/10023 ,  H01S3/1301 ,  H01S2301/06

摘要： 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.

摘要翻译： 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。