公开(公告)号：US08909062B2

公开(公告)日：2014-12-09

申请号：US13526217

申请日：2012-06-18

Applicant: Jeng-yuan Yang ,  Youichi Akasaka ,  Motoyoshi Sekiya ,  Inwoong Kim

Inventor： Jeng-yuan Yang ,  Youichi Akasaka ,  Motoyoshi Sekiya ,  Inwoong Kim

IPC: H04B10/00 ,  H01S3/00

CPC classification number: H04B10/2912

Abstract: A method for regenerating optical signal includes determining a source optical signal to be regenerated, adding a first pump optical signal and a second pump optical signal to the source optical signal to yield an intermediate optical signal, creating a first conjugate optical signal and a second conjugate optical signal from the intermediate optical signal, and performing degenerate phase-sensitive amplification utilizing the first conjugate optical signal, the second conjugate optical signal and the source optical signal to yield an output optical signal. The source optical signal is modulated with a multilevel modulation format. Each conjugate optical signal has a phase that is a conjugate of a multiple of the phase of the source optical signal.

Abstract translation: 一种用于再生光信号的方法包括确定要再生的源光信号，向源光信号添加第一泵浦光信号和第二泵浦光信号以产生中间光信号，产生第一共轭光信号和第二共轭 来自中间光信号的光信号，以及利用第一共轭光信号，第二共轭光信号和源光信号执行简并相位放大，以产生输出光信号。 源光信号用多电平调制格式进行调制。 每个共轭光信号具有作为源光信号的相位的倍数的共轭的相位。

公开(公告)号：US08705167B2

公开(公告)日：2014-04-22

申请号：US12868205

申请日：2010-08-25

Applicant: Youichi Akasaka

Inventor： Youichi Akasaka

IPC: H01S3/13 ,  H04B10/293 ,  H01S3/10

CPC classification number: H01S3/1308 ,  H01S3/10015 ,  H01S3/1301 ,  H01S3/1305 ,  H01S5/06821 ,  H01S5/5009 ,  H04B10/2507 ,  H04B10/293

Abstract: In accordance with one embodiment of the present disclosure a system for compensating for polarization dependent loss experienced by an optical signal comprises an optical amplifier configured to amplify an optical signal and having a polarization dependent gain (PDG). The system also comprises a polarization rotator coupled to the amplifier and configured to rotate the polarization of the optical signal before the signal enters the amplifier. The system also comprises a polarization dependent loss (PDL) controller coupled to the amplifier and the rotator. The PDL controller may be configured to determine a post-amplifier PDL of the optical signal as the signal leaves the optical amplifier. The PDL controller may also be configured to control the rotator to rotate the polarization of the optical signal based on the post-amplifier PDL, such that the PDG of the amplifier compensates for the PDL experienced by the optical signal.

Abstract translation: 根据本公开的一个实施例，用于补偿由光信号经历的偏振相关损耗的系统包括配置成放大光信号并具有偏振相关增益（PDG）的光放大器。 该系统还包括耦合到放大器并被配置为在信号进入放大器之前旋转光信号的偏振的偏振旋转器。 该系统还包括耦合到放大器和旋转器的偏振相关损耗（PDL）控制器。 PDL控制器可以被配置为当信号离开光放大器时确定光信号的后置放大器PDL。 PDL控制器还可以被配置为控制旋转器以基于后置放大器PDL旋转光信号的偏振，使得放大器的PDG补偿由光信号经历的PDL。

公开(公告)号：US20090214202A1

公开(公告)日：2009-08-27

申请号：US12253281

申请日：2008-10-17

Applicant: Youichi Akasaka ,  Takao Naito

Inventor： Youichi Akasaka ,  Takao Naito

IPC: H04B10/08

CPC classification number: H04L12/66

Abstract: Selecting a wavelength and a route includes facilitating communication through routes among nodes. Each route is associated with a plurality of wavelengths and comprises one or more segments that couple one node to another node. A polarization mode dispersion value is determined for each wavelength of each route to yield polarization mode dispersion values for each route. A wavelength and a route are selected according to the polarization mode dispersion values.

Abstract translation: 选择波长和路由包括促进通过节点之间的路由的通信。 每个路由与多个波长相关联并且包括将一个节点耦合到另一节点的一个或多个段。 确定每个路线的每个波长的偏振模色散值，以产生每个路线的偏振模色散值。 根据偏振模色散值选择波长和路线。

公开(公告)号：US07039283B2

公开(公告)日：2006-05-02

申请号：US10826125

申请日：2004-04-16

Applicant: Youichi Akasaka

Inventor： Youichi Akasaka

IPC: G02B6/00

CPC classification number: H04B10/2916

Abstract: A communication system and method are disclosed to provide a wider gain bandwidth. One embodiment of the invention is a communication system comprising a transmitter, a Phosphate-doped fiber span, a receiver, and a continuous wavelength light system. When in operation, the transmitter transmits optical signals over the Phosphate-doped fiber span for receipt by the receiver. Concurrently, the continuous wavelength light system pumps continuous wavelength light onto the Phosphate-doped fiber span. The pumping by the continuous wavelength light system generates a total gain bandwidth of at least 120 nm.

Abstract translation: 公开了提供更宽增益带宽的通信系统和方法。 本发明的一个实施例是一种通信系统，包括发射机，掺磷纤维跨距，接收机和连续波长光系统。 在运行时，发射器通过磷酸盐掺杂光纤跨段传输光信号，以便接收器接收。 同时，连续波长光系统将连续波长的光泵送到磷酸盐掺杂的光纤跨度上。 通过连续波长光系统的泵浦产生至少120nm的总增益带宽。

公开(公告)号：US20050052728A1

公开(公告)日：2005-03-10

申请号：US10655901

申请日：2003-09-05

Applicant: Youichi Akasaka

Inventor： Youichi Akasaka

IPC: H04B10/17 ,  H01S3/00

CPC classification number: H04B10/2916

Abstract: A communication system for distributed Raman amplification of optical signals is disclosed. The communication system comprises a first fiber span, a second fiber span, and an amplifier system. The amplifier system generates a light beam and splits the light beam into a first portion and a second portion. The amplifier system transfers the first portion of the light beam onto the first fiber span so that the first portion of the light beam backward propagates over the first fiber span. The amplifier system transfers the second portion of the light beam onto the second fiber span so that the second portion of the light beam forward propagates over the second fiber span.

Abstract translation: 公开了一种用于光信号的分布式拉曼放大的通信系统。 通信系统包括第一光纤跨距，第二光纤跨距和放大器系统。 放大器系统产生光束并将光束分成第一部分和第二部分。 放大器系统将光束的第一部分转移到第一光纤跨度上，使得光束的第一部分向后传播超过第一光纤跨度。 放大器系统将光束的第二部分转移到第二光纤跨度上，使得光束的第二部分向前传播超过第二光纤跨度。

公开(公告)号：US5995694A

公开(公告)日：1999-11-30

申请号：US880024

申请日：1997-06-20

Applicant: Youichi Akasaka ,  Ryuichi Sugizaki

Inventor： Youichi Akasaka ,  Ryuichi Sugizaki

IPC: G02B6/34 ,  H04B10/2525 ,  G02B6/02

CPC classification number: G02B6/29377 ,  H04B10/25253 ,  G02B6/02228 ,  G02B6/02261 ,  G02B6/0228

Abstract: The invention provides a wavelength division multiplex communication link for optical transmissions, which is able to provide a ultra high bit-rate wavelength division multiplex communication at a 1550 nm wavelength band using the existing 1300 nm band zero dispersion of a single mode fiber network. A dispersion compensating fiber DCF having a negative dispersion value at a 1550 nm wavelength band is connected to a single mode fiber SMF of the existing 1300 nm band zero dispersion of a single mode fiber network with a line length which compensates the dispersion slope of the single mode fiber to zero. And, a dispersion flat fiber which makes the dispersion slope zero is further connected, with a line length which makes the remaining dispersion value zero, to the terminal end of a connection link of the single mode fiber SMF and dispersion compensating fiber DCF, whereby both the dispersion slope of a single mode fiber and dispersion value thereof can be adjusted to be zero at the terminal end of the dispersion flat fiber DFF.

Abstract translation: 本发明提供了一种用于光传输的波分复用通信链路，其能够使用单模光纤网络的现有1300nm频带零色散提供在1550nm波长频带处的超高比特率波分复用通信。 在1550nm波长带具有负色散值的色散补偿光纤DCF连接到单模光纤网络的现有1300nm波段零色散的单模光纤SMF，其具有补偿单个光纤网络的色散斜率的线长度 模式光纤为零。 并且，将使色散斜率为零的色散平坦光纤与使剩余色散值为零的线长度进一步连接到单模光纤SMF和色散补偿光纤DCF的连接链路的终端，由此两者 在分散平面光纤DFF的末端可以将单模光纤的色散斜率及其色散值调整为零。

公开(公告)号：US08873950B2

公开(公告)日：2014-10-28

申请号：US13252814

申请日：2011-10-04

Applicant: Youichi Akasaka

Inventor： Youichi Akasaka

IPC: H04B10/08 ,  H04J14/02 ,  H04J14/00 ,  H04B10/079 ,  H04B10/29

CPC classification number: H04J14/0221 ,  H04B10/0795 ,  H04B10/29 ,  H04J14/021 ,  H04J14/0256

Abstract: In accordance with the present disclosure, disadvantages and problems associated with transmitting high capacity (e.g., 400 G) optical signals may be reduced. In accordance with an embodiment of the present disclosure a method for regenerating an optical signal comprises receiving an optical signal at a network element and measuring a performance characteristic of the optical signal. The method further comprises determining that the optical signal needs regeneration based on the performance characteristic of the optical signal. The method additionally comprises performing signal regeneration of the optical signal based on the determination that the optical signal needs regeneration.

Abstract translation: 根据本公开，可以减少与发送高容量（例如，400G）光信号相关联的缺点和问题。 根据本公开的实施例，用于再生光信号的方法包括在网络元件处接收光信号并测量光信号的性能特性。 该方法还包括基于光信号的性能特性确定光信号需要再生。 该方法还包括基于光信号需要再生的确定来执行光信号的信号再生。

公开(公告)号：US08543006B2

公开(公告)日：2013-09-24

申请号：US12879762

申请日：2010-09-10

Applicant: Olga I Vassilieva ,  Youichi Akasaka

Inventor： Olga I Vassilieva ,  Youichi Akasaka

IPC: H04B10/00 ,  H04J14/06 ,  H04B10/12

CPC classification number: H04B10/2572 ,  H04J14/0201 ,  H04J14/0221 ,  H04J14/06

Abstract: A method is provided for reducing polarization dependent loss experienced by an optical signal comprises monitoring a power level of a polarization multiplexed optical signal. The method further comprises detecting a power spike based on the monitored power. The power spike is induced by misalignment of a polarization component axis of the optical signal with a polarization dependent loss (PDL) axis of one or more network elements. The method further comprises rotating the polarization orientation of the optical signal such that the power spike is reduced.

Abstract translation: 提供一种用于减少由光信号经历的偏振相关损耗的方法，包括监视偏振复用光信号的功率电平。 该方法还包括基于所监视的功率来检测功率尖峰。 功率尖峰由光信号的偏振分量轴与一个或多个网络元件的偏振依赖损耗（PDL）轴的未对准引起。 该方法还包括旋转光信号的偏振取向使得功率尖峰减小。

公开(公告)号：US20120050846A1

公开(公告)日：2012-03-01

申请号：US12868205

申请日：2010-08-25

Applicant: Youichi Akasaka

Inventor： Youichi Akasaka

IPC: H01S3/13 ,  H01S5/068

CPC classification number: H01S3/1308 ,  H01S3/10015 ,  H01S3/1301 ,  H01S3/1305 ,  H01S5/06821 ,  H01S5/5009 ,  H04B10/2507 ,  H04B10/293

Abstract: In accordance with one embodiment of the present disclosure a system for compensating for polarization dependent loss experienced by an optical signal comprises an optical amplifier configured to amplify an optical signal and having a polarization dependent gain (PDG). The system also comprises a polarization rotator coupled to the amplifier and configured to rotate the polarization of the optical signal before the signal enters the amplifier. The system also comprises a polarization dependent loss (PDL) controller coupled to the amplifier and the rotator. The PDL controller may be configured to determine a post-amplifier PDL of the optical signal as the signal leaves the optical amplifier. The PDL controller may also be configured to control the rotator to rotate the polarization of the optical signal based on the post-amplifier PDL, such that the PDG of the amplifier compensates for the PDL experienced by the optical signal.

Abstract translation: 根据本公开的一个实施例，用于补偿由光信号经历的偏振相关损耗的系统包括配置成放大光信号并具有偏振相关增益（PDG）的光放大器。 该系统还包括耦合到放大器并被配置为在信号进入放大器之前旋转光信号的偏振的偏振旋转器。 该系统还包括耦合到放大器和旋转器的偏振相关损耗（PDL）控制器。 PDL控制器可以被配置为当信号离开光放大器时确定光信号的后置放大器PDL。 PDL控制器还可以被配置为控制旋转器以基于后置放大器PDL旋转光信号的偏振，使得放大器的PDG补偿由光信号经历的PDL。

公开(公告)号：US08107815B2

公开(公告)日：2012-01-31

申请号：US12059562

申请日：2008-03-31

Applicant: Youichi Akasaka ,  Takao Naito ,  Satoshi Mizutani

Inventor： Youichi Akasaka ,  Takao Naito ,  Satoshi Mizutani

IPC: H04J14/00

CPC classification number: H04B10/1125

Abstract: In one embodiment, a method for providing wireless communications utilizing a passive optical network (PON) is disclosed. The method includes receiving, at a PON, downstream packets from a base station destined for a mobile station, and transmitting the downstream packets to wireless transceivers associated with PON. The method also includes receiving, at the first wireless transceiver communicatively coupled to a first optical network terminal (ONT), the downstream packets from the first ONT and transmitting a first wireless signal comprising the downstream packets to a first cell. The method also includes receiving, at a second wireless transceiver communicatively coupled to a second ONT, the downstream packets from the second ONT and transmitting a second wireless signal comprising the downstream packets to a second cell.

Abstract translation: 在一个实施例中，公开了一种利用无源光网络（PON）提供无线通信的方法。 该方法包括在PON处接收来自去往移动台的基站的下行分组，并将下行分组发送到与PON相关联的无线收发机。 该方法还包括在第一无线收发器处通信地耦合到第一光网络终端（ONT），接收来自第一ONT的下行分组，并将包括下行分组的第一无线信号发送到第一小区。 该方法还包括在通信地耦合到第二ONT的第二无线收发器处接收来自第二ONT的下行分组，并将包括下行分组的第二无线信号发送到第二小区。