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1. 发明授权

US06941074B2 Bidirectionally transmittable optical wavelength division multiplexed transmission system 有权
标题翻译：双向可传输光波分复用传输系统
公开(公告)号：US06941074B2
公开(公告)日：2005-09-06
申请号：US09800891
申请日：2001-03-08
申请人： Kentaro Nakamura , Takafumi Terahara , Junichi Kumasako , Rainer Hainberger
发明人： Kentaro Nakamura , Takafumi Terahara , Junichi Kumasako , Rainer Hainberger
IPC分类号： H01S3/30 , H01S3/06 , H01S3/067 , H04B10/00 , H04B10/29 , H04B10/294 , H04B10/297 , H04J14/00 , H04J14/02 , H04L5/14 , H04B10/02 , H04B10/08 , H04B10/12
CPC分类号： H04B10/2971 , H04B10/2503 , H04B10/2916
摘要： Different bands (C-band and L-band) are allotted respectively to an upstream optical signal and a downstream optical signal. In a transmission-path optical fiber for Raman amplification, the C-band optical signal is amplified by pumping light from a C-band pumping light source, and the L-band optical signal is amplified by pumping light from an L-band pumping light source. As a result of this configuration, the optical signals are Raman-amplified through backward pumping in both upstream and downstream directions, whereby negative effects, which could be exerted on the optical signals by forward pumping, can be avoided.
摘要翻译：分别将不同的频带（C波段和L波段）分配给上行光信号和下行光信号。在用于拉曼放大的传输路径光纤中，C波段光信号通过泵浦来自C波段泵浦光源的光而被放大，并且L波段光信号通过泵浦来自L波段泵浦光的光而被放大资源。作为该结构的结果，光信号通过在上下游方向上的反向泵浦而被拉曼放大，由此可以避免通过正向泵浦对光信号施加的负面影响。

2. 发明授权

US07372622B2 Optical transmission system, optical repeater, and optical transmission method 有权
标题翻译：光传输系统，光中继器，光传输方式
公开(公告)号：US07372622B2
公开(公告)日：2008-05-13
申请号：US11389013
申请日：2006-03-27
申请人： Kentaro Nakamura , Takafumi Terahara , Rainer Hainberger , Junichi Kumasako
发明人： Kentaro Nakamura , Takafumi Terahara , Rainer Hainberger , Junichi Kumasako
IPC分类号： H01S3/00
CPC分类号： H04B10/2916
摘要： In a WDM transmission system employing a plurality of short wavelength bands having great attenuation due to optical fiber transmission, an optical repeater is constructed of a first multiplexing section and a second multiplexing section. The first multiplexing section is used for wavelength-multiplexing both the excitation light from a first Raman excitation light source, which distributively amplifies an S+ band included in light propagating through an optical fiber, and the light propagating through the optical fiber. The second multiplexing section is used for wavelength-multiplexing both the excitation light from a second Raman excitation light source, which distributively amplifies an S+ band included in light propagating through an optical fiber, and the light propagating through the optical fiber. The first and second multiplexing sections are provided between the optical fibers disposed between end offices. Thus an equal and satisfactory optical SN ratio even at any band are obtained.
摘要翻译：在采用由于光纤传输而具有很大衰减的多个短波段的WDM传输系统中，光中继器由第一多路复用部分和第二复用部分构成。第一复用部分用于波长复用来自第一拉曼激励光源的激发光，该第一拉曼激发光源分布放大包含在通过光纤传播的光中的S +波段和通过光纤传播的光。第二复用部分用于波长复用来自第二拉曼激发光源的激发光，该第二拉曼激励光源分布放大包含在通过光纤传播的光中的S +波段和通过光纤传播的光。第一和第二复用部分设置在设置在端部之间的光纤之间。因此，即使在任何频带也获得相等且令人满意的光学SN比。

3. 发明申请

US20060176545A1 Optical transmission system, optical repeater, and optical transmission method 有权
公开(公告)号：US20060176545A1
公开(公告)日：2006-08-10
申请号：US11389013
申请日：2006-03-27
申请人： Kentaro Nakamura , Takafumi Terahara , Rainer Hainberger , Junichi Kumasako
发明人： Kentaro Nakamura , Takafumi Terahara , Rainer Hainberger , Junichi Kumasako
IPC分类号： H01S3/00
CPC分类号： H04B10/2916
摘要： In a WDM transmission system employing a plurality of short wavelength bands having great attenuation due to optical fiber transmission, an optical repeater is constructed of a first multiplexing section and a second multiplexing section. The first multiplexing section is used for wavelength-multiplexing both the excitation light from a first Raman excitation light source, which distributively amplifies an S+ band included in light propagating through an optical fiber, and the light propagating through the optical fiber. The second multiplexing section is used for wavelength-multiplexing both the excitation light from a second Raman excitation light source, which distributively amplifies an S+ band included in light propagating through an optical fiber, and the light propagating through the optical fiber. The first and second multiplexing sections are provided between the optical fibers disposed between end offices. Thus an equal and satisfactory optical SN ratio even at any band are obtained.

4. 发明授权

US07075709B2 Optical transmission system, optical repeater, and optical transmission method 失效
公开(公告)号：US07075709B2
公开(公告)日：2006-07-11
申请号：US10103690
申请日：2002-03-25
申请人： Kentaro Nakamura , Takafumi Terahara , Rainer Hainberger , Junichi Kumasako
发明人： Kentaro Nakamura , Takafumi Terahara , Rainer Hainberger , Junichi Kumasako
IPC分类号： H01S3/00
CPC分类号： H04B10/2916
摘要： In a WDM transmission system employing a plurality of short wavelength bands having great attenuation due to optical fiber transmission, an optical repeater is constructed of a first multiplexing section and a second multiplexing section. The first multiplexing section is used for wavelength-multiplexing both the excitation light from a first Raman excitation light source, which distributively amplifies an S+ band included in light propagating through an optical fiber, and the light propagating through the optical fiber. The second multiplexing section is used for wavelength-multiplexing both the excitation light from a second Raman excitation light source, which distributively amplifies an S+ band included in light propagating through an optical fiber, and the light propagating through the optical fiber. The first and second multiplexing sections are provided between the optical fibers disposed between end offices. Thus an equal and satisfactory optical SN ratio even at any band are obtained.

5. 发明授权

US07796887B2 Wavelength division multiplexing optical transmission system, and wavelength division multiplexing optical transmission method 有权
标题翻译：波分复用光传输系统和波分复用光传输方法
公开(公告)号：US07796887B2
公开(公告)日：2010-09-14
申请号：US10606935
申请日：2003-06-27
申请人： Takafumi Terahara , Kentaro Nakamura
发明人： Takafumi Terahara , Kentaro Nakamura
IPC分类号： H04J14/00 , H04B10/08
CPC分类号： H04J14/02
摘要： The invention aims to provide an optical transmission system that specifies such a transmission condition so as to obtain high spectrum efficiency and a large transmission distance-capacity product at the same time, and uses low cost and small sized optical senders and optical receivers, to realize a high density wavelength multiplexing optical transmission. For this purpose, a WDM optical transmission system of the invention has a system structure that specifies by calculation the spectrum efficiency at which transmission distance-capacity product becomes a maximum value based on the determination of the type of signal light modulation and the assumption of an equation model expressing transmission characteristics of an optical multiplexer and an optical demultiplexer, and optimizes a bit rate and frequency spacing of signal light output from each optical sender, and the transmission characteristics of the optical multiplexer and the optical demultiplexer, so as to approach the spectrum efficiency.
摘要翻译：本发明旨在提供一种光传输系统，其规定了这样的传输条件，以便同时获得高频率效率和大的传输距离容量产品，并且使用低成本和小尺寸的光发送器和光接收机来实现高密度波长复用光传输。为此，本发明的WDM光传输系统具有系统结构，该系统结构根据信号光调制类型的确定，通过计算确定传输距离容量乘积成为最大值的频谱效率，表示光复用器和光解复用器的传输特性的方程模型，并且优化从每个光发送器输出的信号光的比特率和频率间隔以及光复用器和光解复用器的传输特性，以便接近频谱效率。

6. 发明授权

US07437074B2 Wavelength division multiplexing transmission system 有权
标题翻译：波分复用传输系统
公开(公告)号：US07437074B2
公开(公告)日：2008-10-14
申请号：US10809929
申请日：2004-03-26
申请人： Kentaro Nakamura , Takafumi Terahara
发明人： Kentaro Nakamura , Takafumi Terahara
IPC分类号： H04J14/02 , H04B10/04 , H04B10/08
CPC分类号： H04J14/02 , H04J14/0227 , H04J14/0241 , H04J14/0279
摘要： A WDM transmission system is provided which can multiplex/demultiplex and transmit wavelength division multiplexing signals, where signal lights have a different signal bandwidth, in a status without much deterioration of transmission quality. In the WDM transmission system, an optical receiver includes a demultiplexing unit which demultiplexes the wavelength division multiplexing signals and outputs the demultiplexed signal lights from a plurality of output ports, wherein each output port has transmission characteristics to be set such that the bandwidth of the transmission band where the light transmits and the bandwidth of the non-transmission band where light does not transmit are different, and the transmission band substantially matches with the signal band of the signal lights that are output from the output port out of the received wavelength division multiplexing signals.
摘要翻译：提供一种WDM传输系统，其能够在传输质量不会恶化的状态下复用/解复用和发送信号光具有不同信号带宽的波分复用信号。在WDM传输系统中，光接收机包括解复用单元，其解复用波分多路复用信号，并从多个输出端口输出解复用的信号光，其中每个输出端口具有传输特性以使传输带宽光传输的频带和光不发射的非传输频带的带宽不同，并且传输频带与从接收到的波分复用中输出端口输出的信号光的信号频带基本一致信号。

7. 发明申请

US20070177151A1 Interferometer for demodulating differential M-phase shift keying signal 失效
标题翻译：用于解调差分M相移键控信号的干涉仪
公开(公告)号：US20070177151A1
公开(公告)日：2007-08-02
申请号：US11651591
申请日：2007-01-10
申请人： Akihiko Isomura , Jens Rasmussen , Takafumi Terahara , Kentaro Nakamura , Takeshi Hoshida , George Ishikawa , Hiroshi Onaka , Morio Wada , Hiroyuki Matsuura , Akira Miura , Yasuyyki Suzuki , Hideaki Arai , Satoshi Takasugi
发明人： Akihiko Isomura , Jens Rasmussen , Takafumi Terahara , Kentaro Nakamura , Takeshi Hoshida , George Ishikawa , Hiroshi Onaka , Morio Wada , Hiroyuki Matsuura , Akira Miura , Yasuyyki Suzuki , Hideaki Arai , Satoshi Takasugi
IPC分类号： G01B9/02
CPC分类号： G02F1/225 , G02F2203/21 , H04L1/0047 , H04L27/223
摘要： An interferometer for demodulating a differential M-phase shift keying signal includes a PLC type interferometer main body, a heating portion that heats the PLC type interferometer main body, and an intermediate member having a higher stiffness than that of the PLC type interferometer main body, for bonding the PLC type interferometer main body and the heating portion with each other while being sandwiched therebetween. A linear expansion coefficient difference between the PLC type interferometer main body and the intermediate member is equal to or smaller than 4.5×10−6/° C., and a thermal conductivity difference between the PLC type interferometer main body and the intermediate member is equal to or larger than 10 W/mK. A phase of an optical signal flowing through the interferometer is adjusted by using the heating portion and a second heating portion.
摘要翻译：用于解调差分M相移键控信号的干涉仪包括PLC型干涉仪主体，加热PLC型干涉仪主体的加热部分和具有比PLC型干涉仪主体更高刚度的中间部件，用于将PLC型干涉仪主体和加热部分夹在两者之间彼此粘合。 PLC型干涉仪主体与中间部件之间的线膨胀系数差等于或小于4.5×10 -6 /℃，PLC型干涉仪主体之间的热导率差中间部件为10W / m·K以上。通过使用加热部和第二加热部来调节流过干涉仪的光信号的相位。

8. 发明授权

US07860408B2 Interferometer for demodulating differential M-phase shift keying signal 失效
标题翻译：用于解调差分M相移键控信号的干涉仪
公开(公告)号：US07860408B2
公开(公告)日：2010-12-28
申请号：US11651591
申请日：2007-01-10
申请人： Akihiko Isomura , Jens Rasmussen , Takafumi Terahara , Kentaro Nakamura , Takeshi Hoshida , George Ishikawa , Hiroshi Onaka , Morio Wada , Hiroyuki Matsuura , Akira Miura , Yasuyuki Suzuki , Hideaki Arai , Satoshi Takasugi
发明人： Akihiko Isomura , Jens Rasmussen , Takafumi Terahara , Kentaro Nakamura , Takeshi Hoshida , George Ishikawa , Hiroshi Onaka , Morio Wada , Hiroyuki Matsuura , Akira Miura , Yasuyuki Suzuki , Hideaki Arai , Satoshi Takasugi
IPC分类号： H04B10/06
CPC分类号： G02F1/225 , G02F2203/21 , H04L1/0047 , H04L27/223
摘要： An interferometer for demodulating a differential M-phase shift keying signal includes a PLC type interferometer main body, a heating portion that heats the PLC type interferometer main body, and an intermediate member having a higher stiffness than that of the PLC type interferometer main body, for bonding the PLC type interferometer main body and the heating portion with each other while being sandwiched therebetween. A linear expansion coefficient difference between the PLC type interferometer main body and the intermediate member is equal to or smaller than 4.5×10−6/° C., and a thermal conductivity difference between the PLC type interferometer main body and the intermediate member is equal to or larger than 10 W/mK. A phase of an optical signal flowing through the interferometer is adjusted by using the heating portion and a second heating portion.
摘要翻译：用于解调差分M相移键控信号的干涉仪包括PLC型干涉仪主体，加热PLC型干涉仪主体的加热部分和具有比PLC型干涉仪主体更高刚度的中间部件，用于将PLC型干涉仪主体和加热部分夹在两者之间彼此粘合。 PLC型干涉仪主体与中间构件之间的线膨胀系数差等于或小于4.5×10-6 /℃，PLC型干涉仪主体与中间构件之间的热导率差相等至10W / mK以上。通过使用加热部和第二加热部来调节流过干涉仪的光信号的相位。

9. 发明申请

US20090220242A1 OPTICAL ADDING AND DROPPING DEVICE AND OPTICAL TRANSMISSION APPARATUS 有权
标题翻译：光学添加和删除设备和光传输设备
公开(公告)号：US20090220242A1
公开(公告)日：2009-09-03
申请号：US12338123
申请日：2008-12-18
申请人： Hiroki OOI , Takafumi Terahara , Kentaro Nakamura , Chihiro Ohshima , Tsuyoshi Yamamoto
发明人： Hiroki OOI , Takafumi Terahara , Kentaro Nakamura , Chihiro Ohshima , Tsuyoshi Yamamoto
IPC分类号： H04J14/02
CPC分类号： H04J14/0213 , H04J14/0205 , H04J14/0206 , H04J14/0208 , H04J14/0212
摘要： An optical adding and dropping device includes a drop section including an input port and having a through port and a plurality of drop ports set as output ports, a first multiplexer adapted to multiplex light from the through port and light from a plurality of add ports, and a spectrum foot removing section provided on the input side of the first multiplexer and adapted to remove a foot of a spectrum of light to be inputted from the add ports to the first multiplexer. The optical adding and dropping device can be configured at a low cost while it has adding and dropping functions.
摘要翻译：一种光分插装置，包括具有输入端口，具有通孔和设置为输出端口的多个分支端口的放置部分，第一多路复用器，用于复用来自通孔的光和来自多个附加端口的光，以及频谱测量脚移除部分，设置在第一多路复用器的输入侧，并且适于将要从添加端口输入的光谱的一个脚部移除到第一多路复用器。光放大装置可以以低成本配置，具有添加和删除功能。

10. 发明申请

US20090047028A1 QUADRATURE PHASE-SHIFT KEYING MODULATOR AND PHASE SHIFT AMOUNT CONTROLLING METHOD FOR THE SAME 有权
标题翻译：相位相移键控调制器及其相位移量控制方法
公开(公告)号：US20090047028A1
公开(公告)日：2009-02-19
申请号：US12234931
申请日：2008-09-22
申请人： Takafumi TERAHARA , Takeshi Hoshida , Kentaro Nakamura , Yuichi Akiyama , Hiroki Ooi , Jens C. Rasmussen , Akira Miura
发明人： Takafumi TERAHARA , Takeshi Hoshida , Kentaro Nakamura , Yuichi Akiyama , Hiroki Ooi , Jens C. Rasmussen , Akira Miura
IPC分类号： H04B10/04
CPC分类号： H04B10/5053 , G02F1/0121 , G02F2001/212 , G02F2201/58 , G02F2203/21 , H04B10/505 , H04B10/50577 , H04B10/5561
摘要： The improved quadrature phase shift keying modulator has a structure such that the average light output power of phase-shift keying modulation light output from the combining unit is changed according to the phase difference between the first and the second optical signal after being combined by means of applying driving signals different in eye crossing percentage by the first modulator and the second modulator, respectively, and has a power monitor monitoring the average light output power of quadrature phase-shift keying modulated light and a phase shift controlling unit which performs feedback control of the phase shift amount in the phase shifting unit based on the average light output power monitored by the power monitor.
摘要翻译：改进的正交相移键控调制器具有这样的结构，使得从组合单元输出的相移键控调制光的平均光输出功率根据第一和第二光信号之间的相位差在通过通过第一调制器和第二调制器分别施加与眼睛交叉百分比不同的驱动信号，并且具有监视正交相移键控调制光的平均光输出功率的功率监视器和执行正交相移键控调制光的相位偏移控制单元的反相控制基于由功率监视器监视的平均光输出功率，移相单元中的相移量。

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