公开(公告)号：US20110173511A1

公开(公告)日：2011-07-14

申请号：US12987368

申请日：2011-01-10

申请人： Yoshikuni MIYATA ,  Hideo Yoshida ,  Kazuo Kubo ,  Takashi Mizuochi

发明人： Yoshikuni MIYATA ,  Hideo Yoshida ,  Kazuo Kubo ,  Takashi Mizuochi

IPC分类号： G06F11/08

CPC分类号： H04L1/0071 ,  H03M13/1102 ,  H03M13/1515 ,  H03M13/152 ,  H03M13/23 ,  H03M13/271 ,  H03M13/29 ,  H03M13/2945 ,  H03M13/2957 ,  H03M13/2963 ,  H03M13/356 ,  H03M13/6561 ,  H03M13/6577 ,  H04L1/0065

摘要： Provided is an error correction encoding device including: an outer encoding circuit (33) for performing encoding processing for outer code; and an inner encoding circuit (34) for performing encoding processing for inner code, the inner encoding circuit (34) including an inner-encoding input circuit (54) for performing interleaving processing in which a parallel input sequence is divided into given lanes, and a given barrel shift is performed for each inner frame. By carrying out interleaving in which the parallel input sequence is divided into the given lanes, and the given barrel shift is performed for the each inner frame, allocation ratios between an information sequence area and a parity sequence area are made uniform, to thereby improve a processing throughput and enhance an error correction capability.

摘要翻译： 提供了一种纠错编码装置，包括：外编码电路，用于对外码执行编码处理; 以及内部编码电路（34），用于对内部码进行编码处理，所述内部编码电路（34）包括内部编码输入电路（54），所述内部编码电路（54）用于执行将并行输入序列划分为给定车道的交错处理，以及 对于每个内部框架执行给定的桶形移位。 通过执行并行输入序列被划分为给定通道的交织，并且对于每个内部帧执行给定的桶形移位，使信息序列区域和奇偶校验序列区域之间的分配比率一致，从而改善 处理吞吐量并增强纠错能力。

公开(公告)号：US20100293432A1

公开(公告)日：2010-11-18

申请号：US12778618

申请日：2010-05-12

申请人： Yoshikuni Miyata ,  Hideo Yoshida ,  Kazuo Kubo ,  Takashi Mizuochi

发明人： Yoshikuni Miyata ,  Hideo Yoshida ,  Kazuo Kubo ,  Takashi Mizuochi

IPC分类号： H03M13/29 ,  G06F11/10

CPC分类号： H03M13/29

摘要： An error-correction coding method that includes outer coding of performing a coding process for an outer code; and inner coding of performing a coding process for an inner code that has an error correction capability adjusted based on an error correction capability of the outer code.

摘要翻译： 一种纠错编码方法，包括对外部码进行编码处理的外部编码; 以及对具有基于外部码的​​纠错能力进行了调整的纠错能力的内部码的编码处理进行内部编码。

公开(公告)号：US07239673B2

公开(公告)日：2007-07-03

申请号：US10416550

申请日：2002-09-12

申请人： Kazushige Sawada ,  Kazuo Kubo ,  Takashi Mizuochi ,  Hideo Yoshida ,  Hachiro Fujita ,  Katsuhiro Shimizu ,  Junichi Abe

发明人： Kazushige Sawada ,  Kazuo Kubo ,  Takashi Mizuochi ,  Hideo Yoshida ,  Hachiro Fujita ,  Katsuhiro Shimizu ,  Junichi Abe

IPC分类号： H03K9/00 ,  H04L27/00

CPC分类号： H03M13/6325 ,  G11B20/1833 ,  H04B10/695 ,  H04L1/004 ,  H04L25/063 ,  H04L25/067

摘要： An optical receiver includes a soft-decision deciding unit (7) for deciding an electric received signal according to a plurality of decision levels to output a multivalued decision signal, a demultiplexing unit (5) for serial-to-parallel converting the multivalued decision signal to output a multivalued parallel signal, a soft-decision error correction decoding unit (8) for correcting the multivalued parallel signal based on reliability information to output an error-corrected parallel received signal and decision results indicating the decision of the electric received signal according to the plurality of decision levels, a probability density distribution estimation unit (9) for estimating probability density distributions based on distributions of the decision results, and a decision level control unit (10) for controlling the plurality of decision levels based on the probability density distributions, thereby improving the transmission quality.

摘要翻译： 一种光接收机包括：软判决决定单元，用于根据多个判决电平决定电接收信号以输出多值判定信号;解复用单元，用于串并转换多值判定信号; 输出多值并行信号;软判决纠错解码单元，用于根据可靠性信息校正多值并行信号，以输出纠错后的并行接收信号;以及判定结果，其指示电接收信号根据 所述多个判定级别，基于所述判定结果的分布来估计概率密度分布的概率密度分布估计单元（9），以及用于基于所述概率密度分布来控制所述多个判定级别的判定级别控制单元（10） ，从而提高传输质​​量。

公开(公告)号：US07236703B1

公开(公告)日：2007-06-26

申请号：US10088503

申请日：2000-07-31

申请人： Shigeo Yamanaka ,  Takashi Mizuochi ,  Katsuhiro Shimizu ,  Koji Goto ,  Shinichi Nakagawa ,  Eiichi Shibano ,  Tadami Yasuda

发明人： Shigeo Yamanaka ,  Takashi Mizuochi ,  Katsuhiro Shimizu ,  Koji Goto ,  Shinichi Nakagawa ,  Eiichi Shibano ,  Tadami Yasuda

IPC分类号： H04J14/02

CPC分类号： H04B10/50 ,  G02B6/266 ,  G02B6/29376 ,  H04J14/02 ,  H04J14/0221

摘要： As is described above, an optical wavelength division multiplexing and transmission apparatus according to the present invention has the configuration in which a plurality of slave racks coupling to a master rack can be additionally installed one after another with the master rack. Therefore, in cases where it is desired to expand a function of a transmitter and a function of a receiver due to the increase of a quality of information to be transmitted, the additional installation of the slave rack can be performed without exerting influence on a communication means installed in advance and currently used. Accordingly, it can be expected that the optical wavelength division multiplexing and transmission apparatus is adapted for the optical communication service which is more and more increased in the future.

摘要翻译： 如上所述，根据本发明的光波分复用和发送装置具有这样的配置，其中可以与主机架一个接一个地附加地安装耦合到主机架的多个从机架。 因此，在由于要发送的信息的质量的增加而期望扩展发射机的功能和接收机的功能的情况下，可以执行从机架的附加安装而不对通信产生影响 意味着事先安装，目前使用。 因此，可以预期光波分复用和发送装置适用于将来越来越多的光通信业务。

公开(公告)号：US06445478B1

公开(公告)日：2002-09-03

申请号：US09764271

申请日：2001-01-19

申请人： Katsuhiro Shimizu ,  Takashi Mizuochi ,  Takeshi Komiya ,  Kiwami Matsushita ,  Tadayoshi Kitayama ,  Masatoshi Suzuki ,  Hidenori Taga ,  Shu Yamamoto ,  Noboru Edagawa ,  Itsuro Morita

发明人： Katsuhiro Shimizu ,  Takashi Mizuochi ,  Takeshi Komiya ,  Kiwami Matsushita ,  Tadayoshi Kitayama ,  Masatoshi Suzuki ,  Hidenori Taga ,  Shu Yamamoto ,  Noboru Edagawa ,  Itsuro Morita

IPC分类号： H04B1004

摘要： Detection of an optical pulse position uses an optical pulse string with a determined repetitive ratio and an electric clock signal with a same frequency as the repetitive ratio of the optical pulse string. A phase of the electric clock signal oscillator is shifted and supplied to an optical modulator. The optical modulator modulates the optical pulse string based on the electric clock signal and outputs a modulated optical signal. A photo detector converts the modulated optical signal output from the optical modulator to an electric signal. The phase shift amount of the electric clock signal is controlled to maximize an output from the photo detector. Additionally, a dither signal may be used in the control of the phase shift, more than the optical modulator may be employed, and/or more than color light source may be employed. The use of at least one of feed forward and feedback control provided by maximizing an output of the photo detector allows an optical pulse having a short width to be realized.

公开(公告)号：US06434288B1

公开(公告)日：2002-08-13

申请号：US09530448

申请日：2000-06-13

申请人： Aritomo Uemura ,  Hiroshi Ichibangase ,  Takashi Mizuochi ,  Tadayoshi Kitayama ,  Shu Yamamoto ,  Tetsuya Miyazaki ,  Takatomi Kabashima ,  Naoki Kobayashi

发明人： Aritomo Uemura ,  Hiroshi Ichibangase ,  Takashi Mizuochi ,  Tadayoshi Kitayama ,  Shu Yamamoto ,  Tetsuya Miyazaki ,  Takatomi Kabashima ,  Naoki Kobayashi

IPC分类号： G02B626

CPC分类号： H04J14/0297 ,  H04J14/0283 ,  H04J14/0291 ,  H04J14/0294 ,  H04Q11/0005 ,  H04Q11/0062 ,  H04Q2011/0024 ,  H04Q2011/0043 ,  H04Q2011/0081 ,  H04Q2011/0092

摘要： An optical switching system is implemented by providing a transmitting section with a preparatory transmitted optical signal selector and a working transmitted optical signal splitter, which are each implemented by a 1×2 optical space switch, and by providing a receiving section with a receiving optical switch which is implemented by a 2×2 optical space switch, and with a preparatory receiving optical gate which is implemented by a 1×2 optical space switch. This makes it possible to switch between the working system and preparatory system without employing any 4×4 optical space switch, thereby implementing a practical optical switching system without causing such problems as communication interruption during maintenance or impairment of transmission path working efficiency.

摘要翻译： 光交换系统是通过提供一个具有准备发送光信号选择器和工作传输光信号分离器的发射部分，每个发射部分由1x2光学空间开关实现，并且通过向接收部分提供接收光开关，该接收光开关是 由2x2光学空间开关实现，并且具有由1x2光学空间开关实现的准备接收光栅。 这使得可以在不使用任何4×4光学空间开关的情况下在工作系统和预备系统之间切换，从而实现实用的光交换系统，而不会导致维护期间的通信中断或传输路径工作效率的损害等问题。

公开(公告)号：US06292603B1

公开(公告)日：2001-09-18

申请号：US09207419

申请日：1998-12-08

申请人： Takashi Mizuochi ,  Tadayoshi Kitayama ,  Hideaki Tanaka ,  Koji Goto

发明人： Takashi Mizuochi ,  Tadayoshi Kitayama ,  Hideaki Tanaka ,  Koji Goto

IPC分类号： G02B628

CPC分类号： G02B6/12007 ,  G02B6/2932 ,  G02B6/29353 ,  G02B6/29377 ,  G02B6/29394 ,  H04B10/2519 ,  H04B2210/252 ,  H04B2210/254

摘要： A dispersion compensation device comprises a chirped grating, and a first optical unit for guiding at least a lightwave signal with a wavelength of &lgr;i that needs a positive dispersion compensation and is applied thereto to one end portion of the chirped grating whose grating pitch is shorter, and for furnishing light reflected by the chirped grating to outside the device. The device further comprises a second optical unit for guiding at least a lightwave signal with a wavelength of &lgr;i that needs a negative dispersion compensation and is applied thereto to another end portion of the chirped grating whose grating pitch is longer, and for furnishing light reflected by the chirped grating to outside the device. Both the first and second optical units can be either optical circulators or optical couplers.

摘要翻译： 色散补偿装置包括啁啾光栅和第一光学单元，用于至少引导具有需要正色散补偿的兰姆波长的至少一个光波信号，并将其施加到其光栅间距较短的啁啾光栅的一个端部， 并将由啁啾光栅反射的光提供到设备外部。 该装置还包括第二光学单元，用于至少引导具有需要负色散补偿的兰姆波长的至少一个光波信号，并将其施加到光栅间距较长的啁啾光栅的另一端部，并且用于提供由 啁啾光栅到设备外部。 第一和第二光学单元都可以是光学循环器或光耦合器。

公开(公告)号：US5850301A

公开(公告)日：1998-12-15

申请号：US070556

申请日：1998-04-30

申请人： Takashi Mizuochi ,  Tadayoshi Kitayama

发明人： Takashi Mizuochi ,  Tadayoshi Kitayama

IPC分类号： H04J14/00 ,  G02B6/12 ,  G02B6/34 ,  H04B10/038 ,  H04B10/079 ,  H04B10/2507 ,  H04B10/27 ,  H04B10/272 ,  H04B10/275 ,  H04B10/29 ,  H04B10/291 ,  H04J14/02

CPC分类号： G02B6/29395 ,  G02B6/02085 ,  G02B6/02138 ,  G02B6/29353 ,  G02B6/29355 ,  G02B6/29358 ,  H04J14/0201 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0213 ,  H04J14/0217 ,  G02B6/29317 ,  H04J14/02 ,  H04J14/0206 ,  H04J14/0221

摘要： A branch circuit is formed by forming an optical filter by means of connecting a wavelength selective reflector to between two units of directional coupler and further assembling three units of the optical filter. In the branch circuit, the three optical filters are connected to each other so that the light coming in from a first optical filter is outputted to a third optical filter when the wave length selective reflector reflects the light, and to a second optical filter when the wavelength selective reflector passes the light therethrough; the light coming in from the second optical filter is outputted to the first optical filter when the wavelength selective reflector reflects the light, and to the third filter when the wavelength selective reflector passes the light therethrough; and also the light coming in from the third optical filter is outputted to the second optical filter when the wavelength selective reflector reflects the light and to the first optical filter when the wavelength selective reflector passes the light therethrough.

公开(公告)号：US5455704A

公开(公告)日：1995-10-03

申请号：US111378

申请日：1993-08-24

申请人： Takashi Mizuochi ,  Tadayoshi Kitayama ,  Katsuhiro Shimizu ,  Kiwami Matsushita ,  Nobuyuki Takemura ,  Eiichi Nakagawa

发明人： Takashi Mizuochi ,  Tadayoshi Kitayama ,  Katsuhiro Shimizu ,  Kiwami Matsushita ,  Nobuyuki Takemura ,  Eiichi Nakagawa

IPC分类号： H01S3/094 ,  H01S3/13 ,  H01S3/131 ,  H04B10/152 ,  H04B10/17 ,  H04B10/12 ,  H04B10/00

CPC分类号： H04B10/2912 ,  H01S3/094003 ,  H01S3/1301 ,  H04B10/291 ,  H04B10/2931 ,  H04B10/2935 ,  H01S3/06754 ,  H01S3/09408 ,  H04B2210/003

摘要： An optical-fiber light amplifier using rare-earth-doped optical fibers. The light amplifier combines first and second excitation light from first and second sources to form combined excitation light and divides the combined excitation light for inverted distribution to both two optical fibers. The light entered one optical fiber and that entered the other optical fiber are polarized so as to be perpendicular to each other so that fluctuation of output level is prevented without mutual interference. Alternatively the first excitation light and the second excitation light may have different wavelengths; also in this case, fluctuation of level is prevented without any interference.

摘要翻译： 一种使用稀土掺杂光纤的光纤光放大器。 光放大器组合来自第一和第二源的第一和第二激发光以形成组合的激发光，并将用于反向分配的组合的激发光分成两个光纤。 光进入一根光纤，并且进入另一根光纤被极化以便彼此垂直，从而在没有相互干扰的情况下防止输出电平的波动。 或者，第一激发光和第二激发光可以具有不同的波长; 在这种情况下，也可以防止水平的波动而不受干扰。

公开(公告)号：US09081677B2

公开(公告)日：2015-07-14

申请号：US13982403

申请日：2012-02-20

申请人： Yoshikuni Miyata ,  Kenya Sugihara ,  Kiyoshi Onohara ,  Kazuo Kubo ,  Hideo Yoshida ,  Takashi Mizuochi

发明人： Yoshikuni Miyata ,  Kenya Sugihara ,  Kiyoshi Onohara ,  Kazuo Kubo ,  Hideo Yoshida ,  Takashi Mizuochi

IPC分类号： G06F11/07 ,  H04L1/20

CPC分类号： G06F11/076 ,  H04L1/203

摘要： An input bit error ratio estimating method executed by a communication control unit includes a computing, a condition determining, a first input BER estimating, a second input BER estimating, a third input BER estimating, and an input BER estimation result outputting. In the condition determining, the communication control unit determines which of a plurality of conditions set in advance to be narrowed down to one has been established, based on a post-internal decoding residual error detection ratio. Based on the condition that is determined in the condition determining as one that has been established, the communication control unit selects one out of a plurality of processing procedures for estimating the input BER, namely, selects one of the first input BER estimating to the third input BER estimating and executes the selected processing.

摘要翻译： 由通信控制单元执行的输入误码率估计方法包括计算，条件确定，第一输入BER估计，第二输入BER估计，第三输入BER估计和输入BER估计结果输出。 在所述条件判定中，所述通信控制部基于所述内部解码剩余错误检测率，确定预先设定为被缩小为一个的条件中的哪一个已被建立。 基于在确定为已经建立的条件中确定的条件，通信控制单元从用于估计输入BER的多个处理过程中选择一个，即，选择第三输入BER中的一个， 输入BER估计并执行所选择的处理。