公开(公告)号：US08503887B2

公开(公告)日：2013-08-06

申请号：US12394225

申请日：2009-02-27

Applicant: Nobuhiko Kikuchi

Inventor： Nobuhiko Kikuchi

IPC: H04B10/04

CPC classification number: H04B10/25137 ,  H04B10/5055 ,  H04B2210/254

Abstract: A pre-equalized optical transmitter includes, a laser source; a duo-binary pre-coder circuit; a pre-equalization circuit for applying an inverse function of chromatic dispersion; at least two D/A converters; and an optical field modulator comprising at least two input terminals for an electric signal. The pre-equalized optical transmitter: converts, by the duo-binary pre-coder circuit, a digital information signal of a predetermined symbol time to be transmitted into a digital complex signal including one sampling point per symbol; equalizes, by the pre-equalization circuit, degradation in transmission of the digital complex signal; converts, by the D/A converters, the equalized digital complex signal into an analog signal; suppresses an analog signal leaking outside a Nyquist bandwidth by at least 23 dB; modulates, by the optical field modulator, light output from the laser source with the analog signal to generate a modulated optical field signal; and transmits the modulated optical field signal.

Abstract translation: 预均衡光发射机包括：激光源; 二进制预编码电路; 用于施加色散的反函数的预均衡电路; 至少两个D / A转换器; 以及包括用于电信号的至少两个输入端的光场调制器。 预均衡光发射机：通过二进制二进制编码器电路将预定符号时间的数字信息信号转换成包括每符号一个采样点的数字复信号; 通过预均衡电路均衡数字复合信号的传输劣化; 通过D / A转换器将均衡的数字复合信号转换为模拟信号; 抑制奈奎斯特带宽外的模拟信号至少23 dB; 通过光场调制器调制来自激光源的光与模拟信号的输出，以产生调制的光场信号; 并发送调制的光场信号。

公开(公告)号：US20110305457A1

公开(公告)日：2011-12-15

申请号：US13201278

申请日：2009-03-02

Applicant: Nobuhiko Kikuchi

Inventor： Nobuhiko Kikuchi

IPC: H04B10/00 ,  H04J14/02 ,  H04J14/06 ,  H04B10/12

CPC classification number: H04B10/5055 ,  H04B10/541 ,  H04B10/676 ,  H04B10/695 ,  H04L25/061 ,  H04L27/3845

Abstract: Provided is an optical multilevel transmission system, comprising at least one optical multilevel transmitter for transmitting an optical multilevel signal obtained and an optical multilevel receiver for receiving the optical multilevel signal. The received optical multilevel signal has a larger noise in an angular direction than in a radial direction. The optical multilevel receiver sets, in a symbol decision of the received optical multilevel signal demodulated on the complex plane, for positions of all or some of ideal signal points, a width in the angular direction of a decision area, to which each of the ideal signal points belongs and which is measured along a circumference of a circle centered at an origin and passing through a center of the each of the ideal signal points, larger than a width in the angular direction of a decision area defined based on a Euclidean distance.

Abstract translation: 提供了一种光学多电平传输系统，包括至少一个光学多电平发射机，用于发射所获得的光学多电平信号和用于接收光学多电平信号的光学多电平接收机。 所接收的光学多电平信号在角度方向上具有比径向方向更大的噪声。 光复用多电平接收机在复平面解调的接收光多电平信号的符号判定中，针对理想信号点的全部或一部分的位置，确定每个理想信号点的角度方向上的宽度 信号点属于并沿着以原点为中心并穿过每个理想信号点的中心的圆的圆周测量，大于基于欧几里得距离定义的判定区域的角度方向上的宽度。

公开(公告)号：US07650075B2

公开(公告)日：2010-01-19

申请号：US11200036

申请日：2005-08-10

Applicant: Nobuhiko Kikuchi

Inventor： Nobuhiko Kikuchi

IPC: H04B10/08 ,  H04J14/02

CPC classification number: H04J14/0295 ,  H04J14/0206 ,  H04J14/0212 ,  H04J14/0227 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0283 ,  H04J14/0284 ,  H04J14/0286 ,  H04J14/0294

Abstract: Heretofore, it was necessary to individually locate an optical switch, an optical switch control circuit, and the like, before and after an optical transceiver that performs optical protection. As a result, costs and the space for implementation increase, and a delay in services is also caused, which were the problems.For the purpose of solving the above problems, the present invention provides a simple optical protection method used in an optical add-drop multiplexer.Add switches 105-1 through 105-N and drop switches 103-1 through 103-N for optical signals corresponding to each wavelength in an optical add-drop multiplexer 100 are made controllable independently of one another. Add switches and drop switches of the active-side and backup-side optical add-drop multiplexers are switched by optical switch control circuits 106-1 through 106-N respectively to make a detour around a failure so that the optical protection is achieved.

Abstract translation: 迄今为止，在执行光学保护的光收发器之前和之后，需要单独定位光开关，光开关控制电路等。 因此，成本和实施空间有所增加，服务延迟也是一个问题。 为了解决上述问题，本发明提供了一种在光分插复用器中使用的简单光保护方法。 在光分插多路复用器100中添加开关105-1至105-N和用于与每个波长对应的光信号的分接开关103-1至103-N彼此独立地控制。 分别通过光开关控制电路106-1至106-N切换主动侧和备用侧光分插复用器的开关和分接开关，绕绕故障绕行，从而实现光保护。

公开(公告)号：US06850713B2

公开(公告)日：2005-02-01

申请号：US10320527

申请日：2002-12-17

Applicant: Nobuhiko Kikuchi ,  Ryoji Takeyari ,  Toshiki Sugawara

Inventor： Nobuhiko Kikuchi ,  Ryoji Takeyari ,  Toshiki Sugawara

IPC: G02F1/025 ,  H04B10/516 ,  H04B10/54 ,  H04B10/61 ,  H01S3/10 ,  G02B26/00 ,  G02F1/00 ,  H04B10/12

CPC classification number: H04B10/505 ,  H04B10/5051 ,  H04B10/5053 ,  H04B10/50572 ,  H04B10/506 ,  H04B10/508 ,  H04B2210/258 ,  H04L7/0008

Abstract: With the normal modulation method, it is difficult to construct a Hilbert transform device because it is complicated. To solve the problem, a single sideband modulated optical pulse train is generated by driving a Mach-Zehnder optical modulator for optical pulse generation with a laser source's sine wave clock signals that have been rendered 90 degrees out of phase from each other. The generated pulse train is applied to an optical modulator, modulated with an NRZ (nonreturn-to-zero) data signal, and filtered by a narrow-band optical filter to obtain one of two sidebands.

Abstract translation: 利用正常的调制方法，由于复杂而难以构造希尔伯特变换装置。 为了解决这个问题，通过用激光源的正弦波时钟信号驱动用于光脉冲生成的马赫 - 曾德尔光学调制器来产生单个边带调制的光脉冲串，这些信号彼此相差90度。 所产生的脉冲串被施加到用NRZ（非归零）数据信号调制的光调制器，并由窄带滤光器滤波以获得两个边带之一。

公开(公告)号：US5995278A

公开(公告)日：1999-11-30

申请号：US113549

申请日：1998-07-10

Applicant: Nobuhiko Kikuchi ,  Shinya Sasaki

Inventor： Nobuhiko Kikuchi ,  Shinya Sasaki

IPC: H04B10/2507 ,  H04B10/07 ,  H04B10/2525 ,  H04B10/255 ,  H04B10/2563 ,  H04B10/54 ,  H04B10/58 ,  H04J1/00 ,  H04B10/18

CPC classification number: H04B10/2519 ,  H04B10/25253 ,  H04B10/255

Abstract: An optical transmission system in which influences of worsening of the waveform by SPM are canceled by setting an amount of compensation of a dispersion compensator at about 50% of a total amount of dispersion of an optical fiber transmission line so that received waveform is almost not varied, even if light intensity is varied. In the case where a plurality of dispersion compensators are used, the number of compensators is optimized by setting arrangement interval in the neighborhood of a receiving end at a small value. Further, in a transmission line, in which amounts of dispersion of optical fibers have positive and negative fluctuations, the smallest transmission distance of a transmission system is increased by effecting dispersion compensation so that an expected value of the total amount of dispersion of the transmission line is abnormal dispersion.

Abstract translation: 通过将色散补偿器的补偿量设置在光纤传输线的总色散的约50％以使接收波形几乎不变的光传输系统，其中SPM波形恶化的影响被消除 即使光强变化也是如此。 在使用多个色散补偿器的情况下，通过将接收端附近的布置间隔设定为较小的值来优化补偿器的数量。 此外，在其中光纤的色散量具有正和负波动的传输线中，通过进行色散补偿来增加传输系统的最小传输距离，使得传输线的总色散量的期望值 是异常分散。

公开(公告)号：US5606445A

公开(公告)日：1997-02-25

申请号：US298020

申请日：1994-08-30

Applicant: Nobuhiko Kikuchi ,  Shinya Sasaki

Inventor： Nobuhiko Kikuchi ,  Shinya Sasaki

IPC: H04B10/2507 ,  H04B10/07 ,  H04B10/2525 ,  H04B10/255 ,  H04B10/2563 ,  H04B10/54 ,  H04B10/58 ,  H04B10/18

CPC classification number: H04B10/2519 ,  H04B10/25253 ,  H04B10/255

Abstract: In an optical transmission system, SPM influences on the degradation of wave forms are canceled by setting an amount of compensation of a dispersion compensator at about 50% of the total amount of dispersion of an optical fiber transmission line so that a received wave form is substantially not varied, even if light intensity is varied. When a plurality of dispersion compensator are used, the number of compensators is optimized by setting the arrangement interval in the vicinity of the receiving end to a small value. Further, in a transmission line, in which amounts of dispersion of optical fibers have positive and negative fluctuations, the smallest transmission distance of a transmission system is increased by effecting dispersion compensation so that an expected value of the total amount of dispersion of the transmission line is abnormal dispersion.

Abstract translation: 在光传输系统中，SPM对波形劣化的影响通过将色散补偿器的补偿量设置在光纤传输线的色散总量的约50％以使得接收波形基本上 即使光强变化也不变。 当使用多个色散补偿器时，通过将接收端附近的布置间隔设置为较小的值来优化补偿器的数量。 此外，在其中光纤的色散量具有正和负波动的传输线中，通过进行色散补偿来增加传输系统的最小传输距离，使得传输线的总色散量的期望值 是异常分散。

公开(公告)号：US07769257B2

公开(公告)日：2010-08-03

申请号：US12196424

申请日：2008-08-22

Applicant: Nobuhiko Kikuchi ,  Takao Fukushima ,  Naohiro Sakakida ,  Hiroyuki Nakano

Inventor： Nobuhiko Kikuchi ,  Takao Fukushima ,  Naohiro Sakakida ,  Hiroyuki Nakano

IPC: G02B6/28

CPC classification number: H04J14/02 ,  H04L1/0057 ,  H04L1/0071 ,  H04L69/08

Abstract: A signal speed converting apparatus to be connected to a WDM transmission end office, comprising a first interface connected to a first optical line group, a plurality of second interfaces connected to a second optical line group, and a speed converter. The first interface has a first framer for terminating a frame in a first format received from the first optical line group and outputting an information signal extracted from the received frames as a serial signal train or parallel signal trains. The speed converter converts the output signal from the first framer into transmission signal trains each including interleaved communication frame by cyclically distributing the output signal from the first framer to a plurality of internal lines. Each of the second interfaces has a second framer for converting the communication frame received from one of the internal lines into information frame in a second format to be transmitted to the second optical line group. Management information inserting units are located between the first and second interfaces in order to insert management information to be communicated with an opposite apparatus into the transmission signal trains on the internal lines.

Abstract translation: 一种要连接到WDM传输端局的信号速度转换装置，包括连接到第一光线路组的第一接口，连接到第二光线路组的多个第二接口和速度转换器。 第一接口具有第一成帧器，用于以从第一光线路组接收的第一格式终止帧，并将从接收到的帧提取的信息信号作为串行信号串或并行信号序列输出。 速度转换器通过将来自第一成帧器的输出信号周期性地分配到多条内部线路，将来自第一成帧器的输出信号转换成各自包括交错通信帧的发送信号列。 每个第二接口具有第二成帧器，用于将从内部线路之一接收的通信帧转换为以第二格式发送到第二光学线路组的第二格式的信息帧。 管理信息插入单元位于第一和第二接口之间，以将要与对方设备通信的管理信息插入到内线上的传输信号列中。

公开(公告)号：US20090116839A1

公开(公告)日：2009-05-07

申请号：US12196424

申请日：2008-08-22

Applicant: Nobuhiko Kikuchi ,  Takao Fukushima ,  Naohiro Sakakida ,  Hiroyuki Nakano

Inventor： Nobuhiko Kikuchi ,  Takao Fukushima ,  Naohiro Sakakida ,  Hiroyuki Nakano

IPC: H04J14/02

CPC classification number: H04J14/02 ,  H04L1/0057 ,  H04L1/0071 ,  H04L69/08

Abstract: A signal speed converting apparatus to be connected to a WDM transmission end office, comprising a first interface connected to a first optical line group, a plurality of second interfaces connected to a second optical line group, and a speed converter. The first interface has a first framer for terminating a frame in a first format received from the first optical line group and outputting an information signal extracted from the received frames as a serial signal train or parallel signal trains. The speed converter converts the output signal from the first framer into transmission signal trains each including interleaved communication frame by cyclically distributing the output signal from the first framer to a plurality of internal lines. Each of the second interfaces has a second framer for converting the communication frame received from one of the internal lines into information frame in a second format to be transmitted to the second optical line group. Management information inserting units are located between the first and second interfaces in order to insert management information to be communicated with an opposite apparatus into the transmission signal trains on the internal lines.

Abstract translation: 一种要连接到WDM传输端局的信号速度转换装置，包括连接到第一光线路组的第一接口，连接到第二光线路组的多个第二接口和速度转换器。 第一接口具有第一成帧器，用于以从第一光线路组接收的第一格式终止帧，并将从接收到的帧提取的信息信号作为串行信号串或并行信号序列输出。 速度转换器通过将来自第一成帧器的输出信号周期性地分配到多条内部线路，将来自第一成帧器的输出信号转换成各自包括交错通信帧的发送信号列。 每个第二接口具有第二成帧器，用于将从内部线路之一接收的通信帧转换为以第二格式发送到第二光学线路组的第二格式的信息帧。 管理信息插入单元位于第一和第二接口之间，以将要与对方设备通信的管理信息插入到内线上的传输信号列中。

公开(公告)号：US20060269294A1

公开(公告)日：2006-11-30

申请号：US11354136

申请日：2006-02-15

Applicant: Nobuhiko Kikuchi

Inventor： Nobuhiko Kikuchi

IPC: H04B10/00

CPC classification number: H04B10/5051 ,  H04B10/5053 ,  H04B10/5055 ,  H04B10/5161 ,  H04B10/541 ,  H04B10/5561 ,  H04B10/66 ,  H04L27/2096 ,  H04L27/223

Abstract: Optical transmission equipment, capable of electrically adjusting the delay difference between a plurality of digital signal paths to be connected to a multilevel optical modulation unit or demodulation unit, having multiplexing circuits connected to the digital signal paths and a delay adjustment unit inserted in one of the digital signal paths to adjust delay of N-bit-parallel low-speed digital signals with the timing unit of a bit period of a high-speed serial digital signal to be outputted from multiplexing circuit.

公开(公告)号：US20050226621A1

公开(公告)日：2005-10-13

申请号：US10913432

申请日：2004-08-09

Applicant: Nobuhiko Kikuchi ,  Kenro Sekine ,  Shinya Sasaki

Inventor： Nobuhiko Kikuchi ,  Kenro Sekine ,  Shinya Sasaki

IPC: H04J14/00 ,  G02B6/00 ,  H04B10/27 ,  H04B10/29 ,  H04B10/291 ,  H04J14/02

CPC classification number: H04J14/021 ,  H04J14/0212 ,  H04J14/0221 ,  H04J14/0227

Abstract: It was difficult to detect a wavelength error. Further, a wavelength error of an optical add signal is accompanied by a calculation error of the number of wavelengths of a wavelength division multiplexing signal, which causes a set value of an optical signal level to become abnormal, resulting in the degradation of the optical signal. According to the present invention, part of an inputted optical add signal 118 is reflected by a mirror 117, and is thereby inputted into an optical wavelength multiplexer 105 in the reverse direction so that the optical add signal is returned to paths 115-1 through 115-16 corresponding to wavelengths λ1 through λ16. If the returned optical add signal is an optical add signal having a correct wavelength (in FIG. 1, λ16), the optical signal enters its corresponding backward direction optical detector 113-16. Accordingly, it is possible to check whether or not a wavelength of the optical add signal is correct.

Abstract translation: 很难检测出波长误差。 此外，光添加信号的波长误差伴随着波分复用信号的波长数的计算误差，导致光信号电平的设定值变得异常，导致光信号的劣化 。 根据本发明，输入的光学加法信号118的一部分由反射镜117反射，从而以相反的方向输入到光学波长多路复用器105中，使得光学加法信号返回到路径115-1到115 16对应于波长λ1到λ16。 如果返回的光学加法信号是具有正确波长的光学加法信号（在图1中，λ16），则光信号进入其对应的反向光学检测器113-16。 因此，可以检查光学加法信号的波长是否正确。