公开(公告)号：US20060001950A1

公开(公告)日：2006-01-05

申请号：US11212903

申请日：2005-08-29

申请人： Koji Fujimura ,  Misao Sakano ,  Takeshi Nakajima ,  Shu Namiki

发明人： Koji Fujimura ,  Misao Sakano ,  Takeshi Nakajima ,  Shu Namiki

IPC分类号： H01S3/00

CPC分类号： 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

摘要： A multiple-wavelength-pumped Raman amplifier includes a control unit that controls, based on a relational expression associating an amount of fluctuation in a current signal light power at a signal input end, an amount of fluctuation in a current pumping light power at a pumping light input end, an amount of fluctuation in the current signal power at a signal output end, and an amount of fluctuation in the current pumping light power at a pumping light output end, two fluctuation amounts by determining other two fluctuation amounts in advance, to determine pumping light powers satisfying the relational expression.

摘要翻译： 多波长泵浦拉曼放大器包括控制单元，其基于将信号输入端的当前信号光功率中的波动量相关联的关系表达式控制泵浦时的当前泵浦光功率的波动量 光输入端，信号输出端的当前信号功率的波动量以及泵浦光输出端的当前泵浦光功率的波动量，通过预先确定其他两个波动量来确定两个波动量，到 确定满足关系表达式的泵浦光功率。

公开(公告)号：US06611369B2

公开(公告)日：2003-08-26

申请号：US09654974

申请日：2000-09-05

申请人： Shunichi Matsushita ,  Shu Namiki ,  Yoshihiro Emori

发明人： Shunichi Matsushita ,  Shu Namiki ,  Yoshihiro Emori

IPC分类号： H01S330

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

摘要： An optical signal amplifier comprises 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 comprise 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.

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。 去偏振器可以包括支持两种偏振模式的一个或多个双折射光纤，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。

公开(公告)号：US5553178A

公开(公告)日：1996-09-03

申请号：US150194

申请日：1994-04-22

申请人： Shu Namiki

发明人： Shu Namiki

IPC分类号： G02B6/42 ,  G02B3/02 ,  G02B6/32

CPC分类号： G02B6/4206

摘要： The present invention provides an asymmetrical lens showing different sets of optical characteristics as projected on two planes that are parallel to the optical axis of the lens and perpendicular to each other and satisfying the following simultaneous system of equations.(w.perp.2)/(w.perp.1)=(f.perp.2)/(f.perp.1) [2](w.parallel.2)/(w.parallel.1)32 (f.parallel.2)/(f.parallel.1)[3](d.perp.1)=.vertline.(s.perp.1).vertline.(s.parallel.1) [4](d2)=.vertline.(s.perp.2)-(s.parallel.2) [5]Since the asymmetry of an asymmetrical lens according to the invention is clearly defined by a given simultaneous system of equations, it can be effectively used to optically couple optical waveguides with a low optical loss level if the optical waveguides operate with different waveguide modes, if the waveguide modes of the optical waveguides are not similar relative to one another, if the optical waveguides have mutually different sets of optical characteristics or even if the optical waveguides show astigmatism in their respective radiation patterns.

摘要翻译： PCT No.PCT / JP93 / 00446 Sec。 371日期1994年04月22日 102（e）日期1994年4月22日PCT提交1993年4月6日PCT公布。 公开号WO93 / 20468 日期：1993年10月14日本发明提供了一种非对称透镜，其显示出在平行于透镜的光轴并且彼此垂直的两个平面上的不同组的光学特性，并且满足以下同时的方程组（w ORTHOGONAL 2）/（正ORTHOGONAL 1）=（f正离子2）/（f正离子1）[2]（w PARALLEL 2）/（w PARALLEL 1）32（f PARALLEL 2）/（f PARALLEL 1）[3] d正交1）= |（s ORTHOGONAL 1）|（s PARALLEL 1）[4]（d2）= |（s ORTHOGONAL 2） - （s PARALLEL 2）[5]由于根据本发明的不对称透镜的不对称性 通过给定的同时方程式清楚地定义，如果光波导以不同的波导模式操作，则可以有效地光耦合具有低光损耗水平的光波导，如果光波导的波导模式相对于 另一方面，如果光波导具有相互不同的光学特性集合，或者即使如此 光波导在其各自的辐射图中显示像散。

公开(公告)号：US07692852B2

公开(公告)日：2010-04-06

申请号：US11689352

申请日：2007-03-21

申请人： Youichi Akasaka ,  Yoshihiro Emori ,  Shu Namiki

发明人： Youichi Akasaka ,  Yoshihiro Emori ,  Shu Namiki

IPC分类号： H04B10/17

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：US07548368B2

公开(公告)日：2009-06-16

申请号：US10824402

申请日：2004-04-15

申请人： Youichi Akasaka ,  Yoshihiro Emori ,  Shu Namiki

发明人： Youichi Akasaka ,  Yoshihiro Emori ,  Shu Namiki

IPC分类号： H04B10/13 ,  H04B10/17

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：US07447444B2

公开(公告)日：2008-11-04

申请号：US11134275

申请日：2005-05-23

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： H04B10/04

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：US07224513B2

公开(公告)日：2007-05-29

申请号：US11035321

申请日：2005-01-14

申请人： Atsushi Oguri ,  Yoshihiro Emori ,  Shu Namiki

发明人： Atsushi Oguri ,  Yoshihiro Emori ,  Shu Namiki

IPC分类号： H01S3/00

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

摘要： 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.

摘要翻译： 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：US07155095B2

公开(公告)日：2006-12-26

申请号：US10331565

申请日：2002-12-31

申请人： Osamu Aso ,  Masateru Tadakuma ,  Shu Namiki

发明人： Osamu Aso ,  Masateru Tadakuma ,  Shu Namiki

IPC分类号： G02B6/02

CPC分类号： G02F1/3536 ,  G02B6/2766 ,  G02F2201/02

摘要： The present invention provides a method for generating four-wave mixing to obtain idler light with high efficiency, in which the range of lengths of an optical fiber is appropriately set, and probe light and pumping light, having different frequencies, are launched into the optical fiber. When the nonlinear coefficient of the optical fiber, the loss per unit distance, and the wavelength and intensity of the probe light and pumping light are set to certain values, the idler light conversion efficiency at the output end of the optical fiber is a periodic function of an optical fiber having a maximal value and a minimal value. The maximum length of the optical fiber to be used to obtain four-wave mixing is set to be equal to or less than the length Lmax (Lmax=Lm+ΔL) which is given by adding the length of the optical fiber Lm, at which the idler light conversion efficiency takes on the first maximal value in the aforementioned periodic function and distance ΔL or 10% of L.

摘要翻译： 本发明提供了一种用于产生四波混频的方法，以高效率获得惰性光，其中适当地设置光纤的长度范围，并且将具有不同频率的探测光和泵浦光发射到光学 纤维。 当光纤的非线性系数，每单位距离的损耗以及探测光和泵浦光的波长和强度被设置为一定值时，光纤输出端的惰轮光转换效率是周期性函数 具有最大值和最小值的光纤。 用于获得四波混频的光纤的最大长度被设定为等于或小于通过将光纤Lm的长度相加给出的长度Lmax（Lmax = Lm +ΔLL），其中， 空转光转换效率在上述周期函数和距离DeltaL或L的10％处于第一最大值。

公开(公告)号：US06917466B2

公开(公告)日：2005-07-12

申请号：US10603770

申请日：2003-06-26

申请人： Shu Namiki ,  Yoshihiro Emori ,  Mikio Ogai

发明人： Shu Namiki ,  Yoshihiro Emori ,  Mikio Ogai

IPC分类号： H01S3/094 ,  H01S3/131 ,  H01S3/23 ,  H01S3/30 ,  H04B10/291 ,  H04B10/294 ,  H01S3/00

CPC分类号： H04B10/2916 ,  H01S3/094003 ,  H01S3/094096 ,  H01S3/1312 ,  H01S3/2383 ,  H01S3/302 ,  H04B10/2942

摘要： 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.

摘要翻译： 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：US06845117B2

公开(公告)日：2005-01-18

申请号：US10287037

申请日：2002-11-04

申请人： Tsuyoshi Wakisaka ,  Naoki Tsukiji ,  Junji Yoshida ,  Toshio Kimura ,  Shu Namiki

发明人： Tsuyoshi Wakisaka ,  Naoki Tsukiji ,  Junji Yoshida ,  Toshio Kimura ,  Shu Namiki

IPC分类号： H01S3/067 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/30 ,  H01S5/022 ,  H01S5/0625 ,  H01S5/12 ,  H01S5/40 ,  H01S5/00

CPC分类号： H01S5/12 ,  H01S3/06729 ,  H01S3/094003 ,  H01S3/0941 ,  H01S3/09415 ,  H01S3/302 ,  H01S5/005 ,  H01S5/02248 ,  H01S5/02284 ,  H01S5/06256 ,  H01S5/1096 ,  H01S5/1203 ,  H01S5/1215 ,  H01S5/4012 ,  H01S5/4031

摘要： An n-side electrode, an n-substrate, an n-buffer layer, a GRIN-SCH-MQW active layer, a p-spacer, a p-cladding layer, a p-contact layer, and a p-side electrode are laminated one on top another in that order. Above the n-buffer layer, the GRIN-SCH-MQW layer and the p-spacer layer occupy a narrower area than the n-substrate in a direction that is at right angles to the laser emission direction, wherein the remaining area is occupied by a p-blocking layer and an n-blocking layer. Within the p-spacer layer are embedded a first diffraction grating and a second diffraction grating. Between the first and the second diffraction grating and the p-side electrode is provided a current non-injection area.

摘要翻译： n侧电极，n衬底，n缓冲层，GRIN-SCH-MQW有源层，p间隔物，p包层，p接触层和p侧电极是 按顺序叠加在一起。 在n缓冲层上方，GRIN-SCH-MQW层和p间隔层在与激光发射方向成直角的方向上占据比n基板窄的区域，其中剩余区域被 p阻挡层和n阻挡层。 在p间隔层内嵌入第一衍射光栅和第二衍射光栅。 在第一和第二衍射光栅与p侧电极之间设置有电流的非注入区域。