公开(公告)号：US10243664B2

公开(公告)日：2019-03-26

申请号：US14889127

申请日：2014-05-09

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Munehiko Nagatani ,  Hideyuki Nosaka ,  Toshihiro Itoh ,  Koichi Murata ,  Hiroyuki Fukuyama ,  Takashi Saida ,  Shin Kamei ,  Hiroshi Yamazaki ,  Nobuhiro Kikuchi ,  Hiroshi Koizumi ,  Masafumi Nogawa ,  Hiroaki Katsurai ,  Hiroyuki Uzawa ,  Tomoyoshi Kataoka ,  Naoki Fujiwara ,  Hiroto Kawakami ,  Kengo Horikoshi ,  Yves Bouvier ,  Mikio Yoneyama ,  Shigeki Aisawa ,  Masahiro Suzuki

IPC分类号： H04B10/54 ,  H03F1/32 ,  H03F3/04 ,  H03F3/60 ,  H03G3/00 ,  H04B10/516 ,  H03F1/22 ,  H03F3/195 ,  H03F3/24 ,  H03F3/45 ,  H03G3/30 ,  H03F3/08 ,  H03G1/00

摘要： An optical modulator driver circuit (1) includes an amplifier (50, Q10, Q11, R10-R13), and a current amount adjustment circuit (51) capable of adjusting a current amount of the amplifier (50) in accordance with a desired operation mode. The current amount adjustment circuit (51) includes at least two current sources (IS10) that are individually ON/OFF-controllable in accordance with a binary control signal representing the desired operation mode.

公开(公告)号：US10171173B2

公开(公告)日：2019-01-01

申请号：US15122582

申请日：2015-03-17

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Seiji Okamoto ,  Koichi Ishihara ,  Etsushi Yamazaki ,  Mitsuteru Yoshida ,  Tomoyoshi Kataoka ,  Kazushige Yonenaga ,  Yoshiaki Kisaka ,  Masanori Nakamura ,  Masahito Tomizawa

IPC分类号： H04B10/50 ,  H04B10/516 ,  H04B10/2513 ,  H04L27/34 ,  H04B10/508 ,  H04B10/077 ,  H04B10/2557 ,  H04L27/36

摘要： An optical signal transmission apparatus includes a modulation unit which modulates a transmission signal, a training signal sequence generation unit which generates a plurality of signal sequences having power concentrated in a plurality of different frequency bands, at least one of an amplitude and a phase of the plurality of signal sequences being modulated, as a training signal sequence, a signal multiplexing unit which appends the training signal sequence to the transmission signal, and an electro-optical conversion unit which converts a signal sequence obtained by appending the training signal sequence to the transmission signal into an optical signal and transmits the optical signal.

公开(公告)号：US10090921B2

公开(公告)日：2018-10-02

申请号：US15302145

申请日：2015-04-10

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION ,  NTT Electronics Corporation

发明人： Mikio Yoneyama ,  Hiroto Kawakami ,  Takashi Ono ,  Akihiko Matsuura ,  Tomoyoshi Kataoka ,  Katsuya Tanaka ,  Masahiro Tachibana ,  Yuya Oyama

IPC分类号： H04B10/12 ,  H04B10/04 ,  H04B10/00 ,  H04B10/079 ,  H04B10/516 ,  H04L27/36 ,  H04J14/08 ,  H04B10/564 ,  G02F1/01

摘要： A light modulation device detects a power of the modulated optical signal modulated by each of an I-component optical modulator and a Q-component optical modulator, synchronously-detects a component of a frequency fd from the power of the modulated optical signal, outputs a dither signal of a frequency fd/n (where n is a positive integer equal to or larger than 1) applied to a first bias voltage or a second bias voltage when adjusting the first bias voltage or the second bias voltage, outputs two dither signals having a frequency fd/m (where m is a positive integer equal to or larger than 1, where n

公开(公告)号：US20160087727A1

公开(公告)日：2016-03-24

申请号：US14889127

申请日：2014-05-09

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Munehiko Nagatani ,  Hideyuki Nosaka ,  Toshihiro Itoh ,  Koichi Murata ,  Hiroyuki Fukuyama ,  Takashi Saida ,  Shin Kamei ,  Hiroshi Yamazaki ,  Nobuhiro Kikuchi ,  Hiroshi Koizumi ,  Masafumi Nogawa ,  Hiroaki Katsurai ,  Hiroyuki Uzawa ,  Tomoyoshi Kataoka ,  Naoki Fujiwara ,  Hiroto Kawakami ,  Kengo Horikoshi ,  Yves Bouvier ,  Mikio Yoneyama ,  Shigeki Aisawa ,  Masahiro Suzuki

IPC分类号： H04B10/54 ,  H03G3/00 ,  H03F3/04 ,  H03F3/60 ,  H03F1/32

CPC分类号： H04B10/541 ,  H03F1/223 ,  H03F1/32 ,  H03F3/04 ,  H03F3/082 ,  H03F3/195 ,  H03F3/245 ,  H03F3/45085 ,  H03F3/45089 ,  H03F3/45183 ,  H03F3/45188 ,  H03F3/602 ,  H03F2200/18 ,  H03F2200/219 ,  H03F2200/255 ,  H03F2200/27 ,  H03F2200/336 ,  H03F2200/411 ,  H03F2200/72 ,  H03F2200/75 ,  H03F2203/45258 ,  H03F2203/45374 ,  H03F2203/45392 ,  H03F2203/45454 ,  H03F2203/45466 ,  H03F2203/45471 ,  H03F2203/45486 ,  H03F2203/45496 ,  H03F2203/45504 ,  H03F2203/45506 ,  H03F2203/45702 ,  H03G1/0023 ,  H03G1/0082 ,  H03G1/0088 ,  H03G3/00 ,  H03G3/001 ,  H03G3/3084 ,  H04B10/5561 ,  H04B10/588

摘要： An optical modulator driver circuit (1) includes an amplifier (50, Q10, Q11, R10-R13), and a current amount adjustment circuit (51) capable of adjusting a current amount of the amplifier (50) in accordance with a desired operation mode. The current amount adjustment circuit (51) includes at least two current sources (IS10) that are individually ON/OFF-controllable in accordance with a binary control signal representing the desired operation mode.

摘要翻译： 光调制器驱动电路（1）包括放大器（50，Q10，Q11，R10-R13）和电流量调节电路（51），能够根据期望的操作调节放大器（50）的电流量 模式。 电流量调节电路（51）包括至少两个根据表示期望的操作模式的二进制控制信号单独地进行ON / OFF控制的电流源（IS10）。

公开(公告)号：US09247324B2

公开(公告)日：2016-01-26

申请号：US14376786

申请日：2013-02-05

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION ,  NTT Electronics Corporation

发明人： Tomoyoshi Kataoka ,  Mitsunori Fukutoku ,  Etsu Hashimoto ,  Akio Sahara ,  Norio Sato ,  Yosuke Takeuchi

IPC分类号： H04J14/02 ,  H04Q11/00 ,  G02B26/08

摘要： A wavelength selection switch system includes a wavelength selection switch including an input port and an output port, a nonvolatile memory in which configuration information for controlling an operation of the wavelength selection switch is stored, a high-speed memory in which reading and writing can be performed at a higher speed than in the nonvolatile memory and that stores a copy of the configuration information stored in the nonvolatile memory, and a control unit that controls an operation of the wavelength selection switch based on the configuration information read from the high-speed memory, wherein the control unit periodically reads the configuration information stored in the nonvolatile memory and writes a copy of the read configuration information to the high-speed memory.

公开(公告)号：US09294826B2

公开(公告)日：2016-03-22

申请号：US14376786

申请日：2013-02-05

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION ,  NTT Electronics Corporation

发明人： Tomoyoshi Kataoka ,  Mitsunori Fukutoku ,  Etsu Hashimoto ,  Akio Sahara ,  Norio Sato ,  Yosuke Takeuchi

IPC分类号： H04J14/02 ,  H04Q11/00 ,  G02B26/08

CPC分类号： H04Q11/0005 ,  G02B26/0816 ,  H04J14/0212 ,  H04Q2011/0037

摘要： A wavelength selection switch system includes a wavelength selection switch including an input port and an output port, a nonvolatile memory in which configuration information for controlling an operation of the wavelength selection switch is stored, a high-speed memory in which reading and writing can be performed at a higher speed than in the nonvolatile memory and that stores a copy of the configuration information stored in the nonvolatile memory, and a control unit that controls an operation of the wavelength selection switch based on the configuration information read from the high-speed memory, wherein the control unit periodically reads the configuration information stored in the nonvolatile memory and writes a copy of the read configuration information to the high-speed memory.

摘要翻译： 波长选择开关系统包括：波长选择开关，包括输入端口和输出端口;非易失性存储器，其中存储用于控制波长选择开关的操作的配置信息;读取和写入可以是高速存储器 以比非易失性存储器更高的速度执行，并且存储存储在非易失性存储器中的配置信息的副本，以及控制单元，其基于从高速存储器读取的配置信息来控制波长选择开关的操作 其中，所述控制单元周期性地读取存储在所述非易失性存储器中的配置信息，并将所读取的配置信息的副本写入所述高速存储器。

公开(公告)号：US20150030327A1

公开(公告)日：2015-01-29

申请号：US14376786

申请日：2013-02-05

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION ,  NTT Electronics Corporation

发明人： Tomoyoshi Kataoka ,  Mitsunori Fukutoku ,  Etsu Hashimoto ,  Akio Sahara ,  Norio Sato ,  Yosuke Takeuchi

IPC分类号： H04Q11/00

CPC分类号： H04Q11/0005 ,  G02B26/0816 ,  H04J14/0212 ,  H04Q2011/0037

摘要： A wavelength selection switch system includes a wavelength selection switch including an input port and an output port, a nonvolatile memory in which configuration information for controlling an operation of the wavelength selection switch is stored, a high-speed memory in which reading and writing can be performed at a higher speed than in the nonvolatile memory and that stores a copy of the configuration information stored in the nonvolatile memory, and a control unit that controls an operation of the wavelength selection switch based on the configuration information read from the high-speed memory, wherein the control unit periodically reads the configuration information stored in the nonvolatile memory and writes a copy of the read configuration information to the high-speed memory.

摘要翻译： 波长选择开关系统包括：波长选择开关，包括输入端口和输出端口;非易失性存储器，其中存储用于控制波长选择开关的操作的配置信息;读取和写入可以是高速存储器 以比非易失性存储器更高的速度执行，并且存储存储在非易失性存储器中的配置信息的副本，以及控制单元，其基于从高速存储器读取的配置信息来控制波长选择开关的操作 其中，所述控制单元周期性地读取存储在所述非易失性存储器中的配置信息，并将所读取的配置信息的副本写入所述高速存储器。

公开(公告)号：US09667350B2

公开(公告)日：2017-05-30

申请号：US14758941

申请日：2014-01-24

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Kengo Horikoshi ,  Kohki Shibahara ,  Etsushi Yamazaki ,  Mitsuteru Yoshida ,  Koichi Ishihara ,  Takayuki Kobayashi ,  Yoshiaki Kisaka ,  Takuya Ohara ,  Masahito Tomizawa ,  Tomoyoshi Kataoka

IPC分类号： H04B10/60 ,  H04B10/61 ,  H04L27/06 ,  H04L27/38 ,  H04L7/00

CPC分类号： H04B10/6165 ,  H04L7/0041 ,  H04L7/0075 ,  H04L27/066 ,  H04L27/389

摘要： The optical receiving device with phase compensation apparatus uses coherent opto-electric conversion and is designed for receiving phase- or quadrature-amplitude-modulated optical signals. The phase compensation apparatus includes following elements: a carrier-phase estimation unit that estimates carrier phase errors in a received symbol string; a gain adjustment unit that adjusts weighting of each symbols in phase error evaluation performed in the carrier-phase adjustment unit; a phase-cycle-slip reduction unit with a phase-cycle-slip detector using statistical processing performed on the output symbols from the carrier-phase estimation unit; and a phase compensation circuit that compensates carrier phase errors of the received signal using an output from the carrier phase estimation unit.

公开(公告)号：US10122462B2

公开(公告)日：2018-11-06

申请号：US15126557

申请日：2014-11-19

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Takuya Ohara ,  Kei Kitamura ,  Yoshiaki Kisaka ,  Shigeki Aisawa ,  Masahiro Suzuki ,  Etsushi Yamazaki ,  Tomoyoshi Kataoka ,  Masahito Tomizawa ,  Yoshiaki Yamada ,  Mitsuhiro Teshima ,  Akira Hirano

IPC分类号： H04B10/00 ,  H04B10/40 ,  H04B10/516 ,  H04B10/60 ,  H04B10/27 ,  H04J14/00

摘要： A transport apparatus includes: a client signal transceiving unit which transceives a client signal; a line signal transceiving unit which performs electric-optic conversion on a line signal to be transmitted, transmits an optical line signal, performs optic-electric conversion on a received line signal, and outputs an electrical line signal; and a plurality of signal processing units which perform signal processing on the client signal to generate the line signal to be transmitted and perform signal processing on the electrical line signal to generate the client signal. Each of the plurality of signal processing units includes a signal transceiving unit which performs transfer of a branched signal obtained by branching a signal to be transmitted and a merged signal obtained by merging received signals with another signal processing unit, and the signal transceiving unit of each of the plurality of signal processing units and the signal transceiving unit of the other signal processing unit are coupled via an inter-chip wiring.

公开(公告)号：US10038507B2

公开(公告)日：2018-07-31

申请号：US14766635

申请日：2014-02-13

申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

发明人： Mitsuteru Yoshida ,  Etsushi Yamazaki ,  Seiji Okamoto ,  Hiroyuki Uzawa ,  Kengo Horikoshi ,  Koichi Ishihara ,  Takayuki Kobayashi ,  Yoshiaki Kisaka ,  Masahito Tomizawa ,  Naoki Fujiwara ,  Tomoyoshi Kataoka ,  Kazushige Yonenaga

IPC分类号： H04B10/61 ,  H04B10/2507 ,  H04L27/38 ,  H04B10/516 ,  H04J14/06 ,  H04L27/00

CPC分类号： H04B10/6165 ,  H04B10/2507 ,  H04B10/516 ,  H04B10/61 ,  H04J14/06 ,  H04L27/38 ,  H04L2027/0067 ,  H04L2027/0095

摘要： An increase in circuit scale is suppressed and a phase variation caused in a transmission path or the like is compensated for. An optical transmission system includes: a pilot symbol detection unit which detects a plurality of pilot symbols intermittently inserted into a received complex electric field signal that is obtained through coherent detection for a received optical signal; an error signal computation unit which calculates a complex electric field error signal indicating a phase variation at each pilot symbol based on the pilot symbols detected by the pilot symbol detection unit and a predetermined reference symbol; a compensation electric field signal generation unit which estimates a phase variation between the pilot symbols in the received complex electric field signal using filter processing based on the complex electric field error signal calculated by the error signal computation unit; and a phase noise compensation unit which performs phase compensation for the received complex electric field signal based on the phase variation between the pilot symbols estimated by the compensation electric field signal generation unit.