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公开(公告)号：US07995930B2
公开(公告)日：2011-08-09
申请号：US12092031
申请日：2006-05-19
申请人： Mikio Yoneyama , Fumiaki Saitou , Shigeru Ono , Yosuke Takeuchi , Kazushige Yonenaga , Shoichiro Kuwahara , Eiji Yoshida , Yutaka Miyamoto , Hiroto Kawakami
发明人： Mikio Yoneyama , Fumiaki Saitou , Shigeru Ono , Yosuke Takeuchi , Kazushige Yonenaga , Shoichiro Kuwahara , Eiji Yoshida , Yutaka Miyamoto , Hiroto Kawakami
IPC分类号： H04B10/06
CPC分类号： H04L27/2071 , G02F1/0327 , H04B10/677 , H04L27/223
摘要： The present invention relates to an optical receiver, in which the transmittance of a Mach-Zehnder interferometer can be locked at a normal operation point in a simple structure and control. A transmittance detecting circuit and a minute modulation signal detecting circuit are provided in parallel after a balanced optical receiver, and a switch is selectively connectable either a minute modulation signal detecting circuit and a transmittance detecting circuit. In the initial stage of frequency pull-in, the switch is set to connect the transmittance detecting circuit to the synchronous detection circuit. If the transmittance detecting circuit detects that the transmittance of the Mach-Zehnder interferometer at the carrier frequency becomes a desired transmittance, the connection of the switch is switched from the transmittance detecting circuit to the minute modulation signal detecting circuit.
摘要翻译： 光接收机技术领域本发明涉及一种光接收机，其中可以以简单的结构和控制将马赫 - 曾德干涉仪的透射率锁定在正常操作点。 在平衡光接收器之后并联设置透射检测电路和微调信号检测电路，并且开关可选择性地连接微调制信号检测电路和透射检测电路。 在频率拉入的初始阶段，开关被设置为将透射检测电路连接到同步检测电路。 如果透射检测电路检测到载波频率下的马赫 - 策德尔干涉仪的透射率变为期望的透射率，则将开关的连接从透射检测电路切换到微调制信号检测电路。
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公开(公告)号：US20090097867A1
公开(公告)日：2009-04-16
申请号：US12092031
申请日：2006-05-19
申请人： Mikio Yoneyama , Fumiaki Saitou , Shigeru Ono , Yosuke Takeuchi , Kazushige Yonenaga , Shoichiro Kuwahara , Eiji Yoshida , Yutaka Miyamoto , Hiroto Kawakami
发明人： Mikio Yoneyama , Fumiaki Saitou , Shigeru Ono , Yosuke Takeuchi , Kazushige Yonenaga , Shoichiro Kuwahara , Eiji Yoshida , Yutaka Miyamoto , Hiroto Kawakami
IPC分类号： H04B10/06
CPC分类号： H04L27/2071 , G02F1/0327 , H04B10/677 , H04L27/223
摘要： The present invention relates to an optical receiver, in which the transmittance of a Mach-Zehnder interferometer can be locked at a normal operation point in a simple structure and control.A transmittance detecting circuit and a minute modulation signal detecting circuit are provided in parallel after a balanced optical receiver, and a switch is selectively connectable either a minute modulation signal detecting circuit and a transmittance detecting circuit. In the initial stage of frequency pull-in, the switch is set to connect the transmittance detecting circuit to the synchronous detection circuit. If the transmittance detecting circuit detects that the transmittance of the Mach-Zehnder interferometer at the carrier frequency becomes a desired transmittance, the connection of the switch is switched from the transmittance detecting circuit to the minute modulation signal detecting circuit.
摘要翻译： 光接收机技术领域本发明涉及一种光接收机，其中可以以简单的结构和控制将马赫 - 曾德干涉仪的透射率锁定在正常操作点。 在平衡光接收器之后并联设置透射检测电路和微调信号检测电路，并且开关可选择性地连接微调制信号检测电路和透射检测电路。 在频率拉入的初始阶段，开关被设置为将透射检测电路连接到同步检测电路。 如果透射检测电路检测到载波频率下的马赫 - 策德尔干涉仪的透射率变为期望的透射率，则将开关的连接从透射检测电路切换到微调制信号检测电路。
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公开(公告)号：US20140153077A1
公开(公告)日：2014-06-05
申请号：US14122687
申请日：2012-08-21
申请人： Hiroto Kawakami , Eiji Yoshida , Yutaka Miyamoto
发明人： Hiroto Kawakami , Eiji Yoshida , Yutaka Miyamoto
IPC分类号： G02F1/01
CPC分类号： G02F1/0123 , G02B6/28 , G02F1/21 , G02F2001/212 , H04B10/5053 , H04B10/50575 , H04B10/50595 , H04B10/541 , H04B10/548 , H04L27/3411 , H04L27/364
摘要： An optical modulation device including: bias power supplies that output a signal having a bias voltage corresponding to the null point of an optical modulation unit to the optical modulation unit; and synchronous detection circuits that determine whether an intensity of a QAM signal at a drift non-occurrence time where no drift occurs in the bias voltage becomes larger or smaller than the intensity of the QAM signal at a drift occurrence time where a drift occurs in the bias voltage, adjust the bias voltage to maximize the intensity of the QAM signal when determining that the intensity of the QAM signal at the drift non-occurrence time becomes larger than the intensity of the QAM signal at the drift occurrence time, and adjust the bias voltage to minimize the intensity of the QAM signal when determining that the intensity of the QAM signal at the drift non-occurrence time becomes smaller than the intensity of the QAM signal at the drift occurrence time.
摘要翻译： 一种光调制装置，包括：向光调制单元输出具有对应于光调制单元的零点的偏置电压的信号的偏置电源; 以及同步检测电路，其确定在偏置电压中不发生漂移的漂移不发生时间的QAM信号的强度是否大于或者小于在漂移发生时的QAM信号的强度， 当确定漂移不发生时间的QAM信号的强度变得大于漂移发生时的QAM信号的强度时，调整偏置电压以最大化QAM信号的强度，并且调整偏置 电压，以便在确定漂移不发生时间的QAM信号的强度变得小于漂移发生时的QAM信号的强度时，使QAM信号的强度最小化。
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公开(公告)号：US09116368B2
公开(公告)日：2015-08-25
申请号：US14122687
申请日：2012-08-21
申请人： Hiroto Kawakami , Eiji Yoshida , Yutaka Miyamoto
发明人： Hiroto Kawakami , Eiji Yoshida , Yutaka Miyamoto
IPC分类号： G02F1/01 , G02F1/00 , H04B10/12 , G02B6/28 , G02F1/21 , H04B10/54 , H04L27/34 , H04L27/36 , H04B10/548 , H04B10/50
CPC分类号： G02F1/0123 , G02B6/28 , G02F1/21 , G02F2001/212 , H04B10/5053 , H04B10/50575 , H04B10/50595 , H04B10/541 , H04B10/548 , H04L27/3411 , H04L27/364
摘要： An optical modulation device including: bias power supplies that output a signal having a bias voltage corresponding to the null point of an optical modulation unit to the optical modulation unit; and synchronous detection circuits that determine whether an intensity of a QAM signal at a drift non-occurrence time where no drift occurs in the bias voltage becomes larger or smaller than the intensity of the QAM signal at a drift occurrence time where a drift occurs in the bias voltage, adjust the bias voltage to maximize the intensity of the QAM signal when determining that the intensity of the QAM signal at the drift non-occurrence time becomes larger than the intensity of the QAM signal at the drift occurrence time, and adjust the bias voltage to minimize the intensity of the QAM signal when determining that the intensity of the QAM signal at the drift non-occurrence time becomes smaller than the intensity of the QAM signal at the drift occurrence time.
摘要翻译： 一种光调制装置，包括：向光调制单元输出具有对应于光调制单元的零点的偏置电压的信号的偏置电源; 以及同步检测电路，其确定在偏置电压中不发生漂移的漂移不发生时间的QAM信号的强度是否大于或者小于在漂移发生时的QAM信号的强度， 当确定漂移不发生时间的QAM信号的强度变得大于漂移发生时的QAM信号的强度时，调整偏置电压以最大化QAM信号的强度，并且调整偏置 电压，以便在确定漂移不发生时间的QAM信号的强度变得小于漂移发生时的QAM信号的强度时，使QAM信号的强度最小化。
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公开(公告)号：US20070003286A1
公开(公告)日：2007-01-04
申请号：US10552554
申请日：2004-07-05
申请人： Hiroji Masuda , Hiroto Kawakami , Yutaka Miyamoto
发明人： Hiroji Masuda , Hiroto Kawakami , Yutaka Miyamoto
IPC分类号： H04J14/02
CPC分类号： H04B10/291 , H04B2210/003
摘要： An optical fiber communication system is provided which uses remote pumping that is capable of improving pumping efficiency and reducing a noise figure. A coupler (20) of a linear repeater (18) couples signal light to pumping light outputted from a pumping light source (19). The outputted signal light and pumping light reach a linear repeater (25) through transmission fibers (22 to 24) and remote pumping modules (27F and 27R). A coupler (30) of the linear repeater (25) couples the signal light to the pumping light supplied from a pumping light source (29), to output the signal light and the pumping light to the transmission fiber (24). The remote pumping module (27F) divides the pumping light propagated in the transmission fiber (22), from the signal light. The remote pumping module 27F branches the divided pumping light in two directions with a predetermined ratio. After branching, each of the branched pumping light is coupled to the signal light to be supplied to both ends of an erbium-doped fiber. The remote pumping module (27R) is similar in structure to the remote pumping module (27F).
摘要翻译： 提供了一种使用能够提高泵送效率并降低噪声系数的远程泵送的光纤通信系统。 线性中继器（18）的耦合器（20）将信号光耦合到从泵浦光源（19）输出的泵浦光。 输出的信号光和泵浦光通过传输光纤（22至24）和远程泵送模块（27F和27R）到达线性中继器（25）。 线性中继器（25）的耦合器（30）将信号光耦合到从泵浦光源（29）提供的泵浦光，以将信号光和泵浦光输出到传输光纤（24）。 远程泵送模块（27F）将在传输光纤（22）中传播的泵浦光与信号光分开。 远程泵送模块27F以预定比例在两个方向上分支分开的泵浦光。 在分支之后，每个分支泵浦光耦合到要提供给掺铒光纤两端的信号光。 远程泵送模块（27R）在结构上类似于远程泵送模块（27F）。
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公开(公告)号：US07379236B2
公开(公告)日：2008-05-27
申请号：US10552554
申请日：2004-07-05
申请人： Hiroji Masuda , Hiroto Kawakami , Yutaka Miyamoto
发明人： Hiroji Masuda , Hiroto Kawakami , Yutaka Miyamoto
CPC分类号： H04B10/291 , H04B2210/003
摘要： An optical fiber communication system is provided which uses remote pumping that is capable of improving pumping efficiency and reducing a noise figure. A coupler (20) of a linear repeater (18) couples signal light to pumping light outputted from a pumping light source (19). The outputted signal light and pumping light reach a linear repeater (25) through transmission fibers (22 to 24) and remote pumping modules (27F and 27R). A coupler (30) of the linear repeater (25) couples the signal light to the pumping light supplied from a pumping light source (29), to output the signal light and the pumping light to the transmission fiber (24). The remote pumping module (27F) divides the pumping light propagated in the transmission fiber (22), from the signal light. The remote pumping module 27F branches the divided pumping light in two directions with a predetermined ratio. After branching, each of the branched pumping light is coupled to the signal light to be supplied to both ends of an erbium-doped fiber. The remote pumping module (27R) is similar in structure to the remote pumping module (27F).
摘要翻译： 提供了一种使用能够提高泵送效率并降低噪声系数的远程泵送的光纤通信系统。 线性中继器（18）的耦合器（20）将信号光耦合到从泵浦光源（19）输出的泵浦光。 输出的信号光和泵浦光通过传输光纤（22至24）和远程泵送模块（27F和27R）到达线性中继器（25）。 线性中继器（25）的耦合器（30）将信号光耦合到从泵浦光源（29）提供的泵浦光，以将信号光和泵浦光输出到传输光纤（24）。 远程泵送模块（27F）将在传输光纤（22）中传播的泵浦光与信号光分开。 远程泵送模块27F以预定比例在两个方向上分支分开的泵浦光。 在分支之后，每个分支泵浦光耦合到要提供给掺铒光纤两端的信号光。 远程泵送模块（27R）在结构上类似于远程泵送模块（27F）。
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公开(公告)号：US06263139B1
公开(公告)日：2001-07-17
申请号：US09436707
申请日：1999-11-09
申请人： Hiroto Kawakami , Yutaka Miyamoto
发明人： Hiroto Kawakami , Yutaka Miyamoto
IPC分类号： G02B602
CPC分类号： H04B10/2916 , G02B6/02261 , G02B6/02271 , G02B6/0228 , G02B6/29377 , H04B10/2525 , H04B2210/003
摘要： To suppress S/N degradation due to optical amplification and generation of a nonlinear optical effect in a dispersion compensating fiber, and compensate for a loss due to the dispersion compensating fiber without incorporating a long fiber inside a receiver, part of an optical transmission line is constructed by a dispersion compensating fiber and at least part of the optical transmission line is designed to have a Raman gain or a distributed gain. A pump light to obtain a Raman gain or a distributed gain is transmitted from at least one of a transmitter, a receiver, and a repeater to the optical transmission line.
摘要翻译： 为了抑制由于光放大引起的S / N劣化，并且在色散补偿光纤中产生非线性光学效应，并且补偿由于色散补偿光纤而导致的损耗，而不在接收机内结合长纤维，部分光传输线是 由色散补偿光纤构成并且至少部分光传输线被设计成具有拉曼增益或分布增益。 用于获得拉曼增益或分布增益的泵浦光从发射机，接收机和中继器中的至少一个发射到光传输线。
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公开(公告)号：US20120155865A1
公开(公告)日：2012-06-21
申请号：US13393101
申请日：2010-09-07
IPC分类号： H04J14/00
CPC分类号： G02F1/0123 , H04B10/5053 , H04B10/5057 , H04B10/50572 , H04B10/50575 , H04B10/5561
摘要： An optical signal transmitter of the present invention includes: two phase modulating portions; a phase shifter which displaces carrier phases of two output lights from the phase modulating portions by π/2; a multiplexing portion which multiplexes two signal lights, carrier phases of the two signal lights being made orthogonal to each other by the phase shifter; a drive signal electrode portion which supplies a differential data signal to each of four paths of interference optical waveguides, each of the two phase modulating portions having the interference optical waveguides, the differential data signal having an amplitude which is equal to a half-wave voltage Vπ of the two phase modulating portions; a drive amplifier which amplifies the differential data signal to be supplied to each of the four paths of the interference optical waveguides; a data bias electrode portion which supplies a total of four data bias voltages to two arms, each of the two phase modulating portions having the two arms; an orthogonal bias electrode portion which supplies an orthogonal bias voltage to the phase shifter; a data bias power supply portion that adjusts delay times in the two phase modulating portions by applying the data bias voltages to the data bias electrode portion; an orthogonal bias power supply portion that adjusts a delay amount relative to a light output from at least one of the two phase modulating portions by applying the orthogonal bias voltage to the orthogonal bias electrode portion; a dither signal adding portion that adds a dither signal to at most three of the four data bias voltages; a dither detecting portion which detects a wave that is n-times a dither component from an output of the multiplexing portion (where n is an integer equal to or greater than one); and an orthogonal bias control portion which feeds back a detection result of the dither detecting portion to the orthogonal bias power supply portion. The orthogonal bias power supply portion adjusts the delay amount relative to the light output from at least one of the two phase modulating portions by controlling the orthogonal bias voltage to be applied to the orthogonal bias electrode portion based on feedback from the orthogonal bias control portion.
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公开(公告)号：US09020361B2
公开(公告)日：2015-04-28
申请号：US13393101
申请日：2010-09-07
CPC分类号： G02F1/0123 , H04B10/5053 , H04B10/5057 , H04B10/50572 , H04B10/50575 , H04B10/5561
摘要： An optical signal transmitter of the present invention includes: two phase modulating portions; a phase shifter which displaces carrier phases of two output lights from the phase modulating portions by π/2; a multiplexing portion which multiplexes two signal lights, carrier phases of the two signal lights being made orthogonal to each other by the phase shifter; a drive signal electrode portion which supplies a differential data signal to each of four paths of interference optical waveguides, each of the two phase modulating portions having the interference optical waveguides, the differential data signal having an amplitude which is equal to a half-wave voltage Vπ of the two phase modulating portions; a drive amplifier which amplifies the differential data signal to be supplied to each of the four paths of the interference optical waveguides; a data bias electrode portion which supplies a total of four data bias voltages to two arms, each of the two phase modulating portions having the two arms; an orthogonal bias electrode portion which supplies an orthogonal bias voltage to the phase shifter; a data bias power supply portion that adjusts delay times in the two phase modulating portions by applying the data bias voltages to the data bias electrode portion; an orthogonal bias power supply portion that adjusts a delay amount relative to a light output from at least one of the two phase modulating portions by applying the orthogonal bias voltage to the orthogonal bias electrode portion; a dither signal adding portion that adds a dither signal to at most three of the four data bias voltages; a dither detecting portion which detects a wave that is n-times a dither component from an output of the multiplexing portion (where n is an integer equal to or greater than one); and an orthogonal bias control portion which feeds back a detection result of the dither detecting portion to the orthogonal bias power supply portion. The orthogonal bias power supply portion adjusts the delay amount relative to the light output from at least one of the two phase modulating portions by controlling the orthogonal bias voltage to be applied to the orthogonal bias electrode portion based on feedback from the orthogonal bias control portion.
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公开(公告)号：US5265136A
公开(公告)日：1993-11-23
申请号：US955056
申请日：1992-10-01
申请人： Hiroshi Yamazaki , Hiroto Kawakami
发明人： Hiroshi Yamazaki , Hiroto Kawakami
摘要： A sodium cooled fast ractor comprises a reactor vessel in which a liquid metal coolant is accommodated, a core disposed substantially a lower central portion of the reactor vessel in an installed state, a core support structure secured to the reactor vessel for supporting the core, the core support structure dividing an interior of the reactor vessel into a high-pressure plenum below the core and a low-pressure plenum above the high-pressure plenum, a circulation pump unit for applying a discharge pressure to the liquid metal coolant and circulating the same, and an intermediate heat exchanger for performing a heat exchanging operation of the coolant in the reactor vessel. The circulation pump unit is composed of an electromagnetic circulation pump provided with a discharge port and a closed gas space, which is filled up with a closed gas, defined above and communicated with the discharge port. The discharge port is also communicated with the high-pressure plenum, wherein the liquid metal coolant above the discharge port flows into the high-pressure plenum by the discharge gas pressure of the gas accummulated in the closed gas space by the actuation of the electromagnetic circulation pump at a time of trip thereof.
摘要翻译： 钠冷快速反应器包括容纳液态金属冷却剂的反应器容器，在安装状态下基本上设置在反应器容器的下部中心部分的芯部，固定到用于支撑芯体的反应器容器的芯部支撑结构， 核心支撑结构将反应器容器的内部分成在芯下方的高压集气室和高压集气室上方的低压集气室，用于向液态金属冷却剂施加排出压力并使其循环的循环泵单元 以及用于进行反应容器内的冷却剂的热交换操作的中间热交换器。 循环泵单元由设置有排出口和封闭气体空间的电磁循环泵组成，其中填充有封闭气体并且与排出口连通。 排出口还与高压集气室连通，其中排出口上方的液态金属冷却剂通过电磁循环的致动而被积聚在封闭气体空间中的气体的排出气体压力流入高压增压室 在其行程时泵。
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