公开(公告)号：US6065129A

公开(公告)日：2000-05-16

申请号：US89508

申请日：1998-06-03

申请人： Hisaya Sakamoto ,  Akihiko Sugata ,  Tetsuya Kiyonaga ,  Akimitsu Miyazaki

发明人： Hisaya Sakamoto ,  Akihiko Sugata ,  Tetsuya Kiyonaga ,  Akimitsu Miyazaki

IPC分类号： H04B10/40 ,  H03K5/19 ,  H04B10/00 ,  H04B10/50 ,  H04B10/60 ,  H04L7/027 ,  H04L25/02 ,  H04L25/03 ,  G06F1/04

CPC分类号： H03K5/19

摘要： A clock signal detection circuit includes a diode to which a clock signal is applied as an input. If a voltage VD IN on the anode side of the diode is greater than a voltage VD OUT on the cathode side, the clock signal is fed into a transmission line and arrives at a reflecting load upon elapse of a prescribed delay time. When the voltage VD IN on the anode side of the diode becomes smaller than the voltage VD OUT on the cathode side, the clock signal is reflected by the reflecting load and returns to the cathode of the diode through the transmission line. This introduction and reflection of the clock signal is repeated at the clock signal period so that the amplitude on the output side of the diode is enlarged, thereby making it possible to obtain, from an averaging circuit, a clock detection voltage substantially equal to the amplitude value of the clock signal.

摘要翻译： 时钟信号检测电路包括施加时钟信号作为输入的二极管。 如果二极管的阳极侧的电压VD IN大于阴极侧的电压VD OUT，则时钟信号被馈送到传输线，并且在经过规定的延迟时间后到达反射负载。 当二极管的阳极侧的电压VD IN小于阴极侧的电压VD OUT时，时钟信号被反射负载反射，并通过传输线返回到二极管的阴极。 时钟信号的引入和反射在时钟信号周期被重复，使得二极管的输出侧的振幅被放大，从而可以从平均电路获得基本上等于振幅的时钟检测电压 时钟信号的值。

公开(公告)号：US06188738B1

公开(公告)日：2001-02-13

申请号：US09041777

申请日：1998-03-13

申请人： Hisaya Sakamoto ,  Akihiko Sugata ,  Akimitsu Miyazaki ,  Tetsuya Kiyonaga

发明人： Hisaya Sakamoto ,  Akihiko Sugata ,  Akimitsu Miyazaki ,  Tetsuya Kiyonaga

IPC分类号： H04L700

CPC分类号： H04B10/66 ,  H04L7/027 ,  H04L7/033

摘要： Disclosed is a clock extraction circuit for extracting a clock signal which furnishes timing for discriminating a data signal, from the data signal. The clock extraction circuit has a timing extraction unit for extracting the clock signal from the data signal, and a filter, which is provided in front of the timing extraction unit, having an upper limited frequency sufficiently lower than the bit rate of the data. The data signal is input to the timing extraction unit via the filter.

摘要翻译： 公开了一种时钟提取电路，用于从数据信号中提取提供用于鉴别数据信号的定时的时钟信号。 时钟提取电路具有用于从数据信号中提取时钟信号的定时提取单元和设置在定时提取单元前面的具有足够低于数据比特率的限制频率的上限的滤波器。 数据信号通过滤波器输入到定时提取单元。

公开(公告)号：US06643472B1

公开(公告)日：2003-11-04

申请号：US09506702

申请日：2000-02-18

申请人： Hisaya Sakamoto ,  Tetsuya Kiyonaga ,  Takashi Kurooka ,  Akimitsu Miyazaki ,  Nobuaki Sato

发明人： Hisaya Sakamoto ,  Tetsuya Kiyonaga ,  Takashi Kurooka ,  Akimitsu Miyazaki ,  Nobuaki Sato

IPC分类号： H04B1000

CPC分类号： H04B10/66

摘要： An APD bias circuit includes an APD, an equalizer amplifier receiving an output signal of the APD, and first, second and third resistors connected in series to the APD to which a bias voltage is applied therethrough. A bias control circuit is connected to a first node between the first and second resistors, and receives a current from the first node so that a voltage of the first node can be maintained at a constant level. A first capacitor is connected between a ground and a second node between the second and third resistors. A second capacitor is connected between the ground and a third node between the third resistor and the APD. A first time constant defined by the second resistor and the first capacitor is greater than a second time constant defined by the third resistor and the second capacitor.

摘要翻译： APD偏置电路包括APD，接收APD的输出信号的均衡器放大器以及与施加偏置电压的APD串联连接的第一，第二和第三电阻器。 偏置控制电路连接到第一和第二电阻之间的第一节点，并且从第一节点接收电流，使得第一节点的电压可以维持在恒定电平。 第一电容器连接在第二和第三电阻之间的接地和第二节点之间。 第二电容器连接在第三电阻和APD之间的地与第三节点之间。 由第二电阻器和第一电容器限定的第一时间常数大于由第三电阻器和第二电容器限定的第二时间常数。

公开(公告)号：US06594070B2

公开(公告)日：2003-07-15

申请号：US10062464

申请日：2002-02-05

申请人： Akihiko Sugata ,  Tetsuya Kiyonaga

发明人： Akihiko Sugata ,  Tetsuya Kiyonaga

IPC分类号： G02F202

CPC分类号： H04B10/0775 ,  H03L7/099 ,  H04B10/6932 ,  H04B2210/074 ,  H04L7/027

摘要： An optical communication system transmits an optical signal from an optical sender to an optical receiver. A superimposed signal corresponding to a transmission speed of the optical signal is superimposed on the optical signal. At the optical receiver which receives the transmission light, the transmission speed is detected based on the superimposed signal included in the received light, and setting of a phase-lock loop circuit for extracting a clock signal is switched, to thereby perform a data decision processing of the received light. Thus, it becomes possible to receive and process optical signals at different transmission speeds by a single optical receiver, even when optical signals at the different transmission speeds are transmitted between the optical sender and the optical receiver.

摘要翻译： 光通信系统将光信号从光发送器发送到光接收机。 对应于光信号的传输速度的叠加信号叠加在光信号上。 在接收到发送光的光接收机中，基于接收到的光中包含的叠加信号来检测发送速度，切换提取时钟信号的锁相环电路的设定，进行数据判定处理 的接收光。 因此，即使在光发送器和光接收器之间传输不同传输速度的光信号，也可以通过单个光接收器接收和处理不同传输速度的光信号。

公开(公告)号：US20060088322A1

公开(公告)日：2006-04-27

申请号：US11044181

申请日：2005-01-28

申请人： Yuka Kobayashi ,  Tetsuya Kiyonaga

发明人： Yuka Kobayashi ,  Tetsuya Kiyonaga

IPC分类号： H04B10/04

CPC分类号： H04B10/505 ,  H04B10/50575 ,  H04B10/564 ,  H04B10/58

摘要： An optical transmitter device capable of high-speed shutdown of optical output. A bias controller generates a low-frequency signal, extracts the frequency component of a low-frequency signal from an electrical signal fed back thereto, and compares the phase of the frequency component of the low-frequency signal generated thereby with that of the frequency component of the extracted low-frequency signal, to generate a direct-current voltage with which the operating point of an optical modulator is optimized. Using a half-wave voltage of the optical modulator and an optimum voltage, a bottom voltage calculation unit calculates a bottom voltage corresponding to a minimum of the operation characteristic curve of the modulator. A voltage selection unit selects the direct-current voltage during normal operation, to apply the optical modulator with a bias voltage derived from the direct-current voltage, and selects the bottom voltage at the time of shutdown, to apply the bottom voltage to the modulator.

摘要翻译： 一种能够高速关闭光输出的光发射机装置。 偏置控制器产生低频信号，从反馈的电信号中提取低频信号的频率分量，并将由此产生的低频信号的频率分量与频率分量的频率分量的相位进行比较 提取的低频信号，以产生最优化光调制器的工作点的直流电压。 使用光调制器的半波电压和最佳电压，底电压计算单元计算对应于调制器的操作特性曲线的最小值的底电压。 电压选择单元在正常操作期间选择直流电压，以从直流电压导出的偏置电压来施加光学调制器，并且在关闭时选择底部电压，将底部电压施加到调制器 。

公开(公告)号：US06501774B2

公开(公告)日：2002-12-31

申请号：US09983184

申请日：2001-10-23

申请人： Hiroshi Kuwahara ,  Norio Nagase ,  Setsuo Misaizu ,  Tetsuya Kiyonaga ,  Tomoyuki Otsuka ,  Motoyoshi Sekiya

发明人： Hiroshi Kuwahara ,  Norio Nagase ,  Setsuo Misaizu ,  Tetsuya Kiyonaga ,  Tomoyuki Otsuka ,  Motoyoshi Sekiya

IPC分类号： H01S313

CPC分类号： H01S5/0687 ,  H01S3/1317 ,  H01S5/06804 ,  H04B10/506 ,  H04B10/572 ,  H04J14/02

摘要： The optical transmission apparatus for multiple wavelengths according to the present invention comprises; a light source, a temperature control section for controlling the temperature of the light source, a temperature control (ATC) loop for controlling the operation of the temperature control section, and a wavelength control (AFC) loop. The ATC loop detects the temperature of the light source and feedback controls the operation of the temperature control section, so that the optical output wavelengths of the light source fall within a wavelength capture range corresponding to a target wavelength of the AFC loop. The AFC loop has a wavelength detection filter having a periodic transmission wavelength characteristic. After the operation of the ATC loop has stabilized, a wavelength capture operation is commenced, and the operation of the temperature control section is controlled so that the optical output wavelength of the light source is captured at a stable point corresponding to a target wavelength, among a plurality of stable points.

摘要翻译： 根据本发明的用于多个波长的光传输装置包括： 光源，用于控制光源的温度的温度控制部，用于控制温度控制部的动作的温度控制（ATC）回路和波长控制（AFC）回路。 ATC环路检测光源的温度，并且反馈控制温度控制部分的操作，使得光源的光输出波长落在对应于AFC回路的目标波长的波长捕获范围内。 AFC回路具有具有周期性透射波长特性的波长检测滤波器。 在ATC环路的操作稳定后，开始波长捕获操作，并且控制温度控制部分的操作，使得在与目标波长相对应的稳定点捕获光源的光输出波长，其中 多个稳定点。

公开(公告)号：US07215894B2

公开(公告)日：2007-05-08

申请号：US11044181

申请日：2005-01-28

申请人： Yuka Kobayashi ,  Tetsuya Kiyonaga

发明人： Yuka Kobayashi ,  Tetsuya Kiyonaga

IPC分类号： H04B10/12

CPC分类号： H04B10/505 ,  H04B10/50575 ,  H04B10/564 ,  H04B10/58

摘要： An optical transmitter device capable of high-speed shutdown of optical output. A bias controller generates a low-frequency signal, extracts the frequency component of a low-frequency signal from an electrical signal fed back thereto, and compares the phase of the frequency component of the low-frequency signal generated thereby with that of the frequency component of the extracted low-frequency signal, to generate a direct-current voltage with which the operating point of an optical modulator is optimized. Using a half-wave voltage of the optical modulator and an optimum voltage, a bottom voltage calculation unit calculates a bottom voltage corresponding to a minimum of the operation characteristic curve of the modulator. A voltage selection unit selects the direct-current voltage during normal operation, to apply the optical modulator with a bias voltage derived from the direct-current voltage, and selects the bottom voltage at the time of shutdown, to apply the bottom voltage to the modulator.

摘要翻译： 一种能够高速关闭光输出的光发射机装置。 偏置控制器产生低频信号，从反馈的电信号中提取低频信号的频率分量，并将由此产生的低频信号的频率分量与频率分量的频率分量的相位进行比较 提取的低频信号，以产生最优化光调制器的工作点的直流电压。 使用光调制器的半波电压和最佳电压，底电压计算单元计算对应于调制器的操作特性曲线的最小值的底电压。 电压选择单元在正常操作期间选择直流电压，以从直流电压导出的偏置电压来施加光学调制器，并且在关闭时选择底部电压，将底部电压施加到调制器 。

公开(公告)号：US5652767A

公开(公告)日：1997-07-29

申请号：US406321

申请日：1995-03-17

申请人： Tetsuya Kiyonaga ,  Tetsuo Watanabe ,  Tatsuro Kunikane ,  Hiroyuki Furukawa ,  Yoshimitsu Sakai ,  Sadayuki Miyata ,  Takeo Iwama

发明人： Tetsuya Kiyonaga ,  Tetsuo Watanabe ,  Tatsuro Kunikane ,  Hiroyuki Furukawa ,  Yoshimitsu Sakai ,  Sadayuki Miyata ,  Takeo Iwama

IPC分类号： H04B10/60 ,  H04B10/071 ,  H04B10/2507 ,  H04B10/40 ,  H04B10/50 ,  H04B10/564 ,  H04B10/58 ,  H04B10/67 ,  H04B10/69 ,  H04J14/00 ,  H04J14/02 ,  H04L7/00 ,  H04L7/027 ,  H04L7/033 ,  H04L25/03 ,  H04L25/06 ,  H04L25/08 ,  H03D1/00 ,  G08C19/36 ,  H04L7/02

CPC分类号： H04L7/0338 ,  H04J14/00 ,  H04J14/0246 ,  H04J14/025 ,  H04L25/069 ,  H04L7/0075 ,  H04J14/0226 ,  H04J14/0279

摘要： An optical parallel receiving module receives optical signals transmitted in parallel in a plurality of channels by using optical fibers. The optical parallel receiving module includes photo-electric conversion elements for converting received signals which are electric signals as received signals, limiter amplifiers for comparing the received signals and a threshold level, and data decision circuits for recognizing data at a timing in every period of received data using a reference clock. Each of the data decision circuits includes a data edge position detecting unit for detecting in which region of a plurality of regions a rising edge of the received data is and for outputting a detecting signal corresponding to a detected region, one period of the received data having a reference phase equal to a phase of the reference clock signal being divided into the plurality of regions; and a data acquisition unit to which a plurality of clocks having different phases and the detecting signal from the data edge position detecting unit are supplied, each of the plurality of clocks corresponding to one of the plurality of regions, for acquiring data at a timing of a clock corresponding to the region in which the rising edge of the received data is detected by the data edge position detecting unit.

摘要翻译： 光并行接收模块通过使用光纤接收在多个信道中并行发送的光信号。 光并行接收模块包括用于转换作为电信号的接收信号作为接收信号的光电转换元件，用于比较接收信号的限幅放大器和阈值电平，以及用于在接收到的每个周期中的定时识别数据的数据判定电路 数据使用参考时钟。 每个数据判定电路包括数据边缘位置检测单元，用于检测接收数据的上升沿的多个区域的哪个区域，并输出与检测区域对应的检测信号，所接收的数据的一个周期具有 参考相位等于参考时钟信号的相位被分成多个区域; 以及数据采集单元，向其提供具有不同相位的多个时钟和来自数据边缘位置检测单元的检测信号，所述多个时钟中的每一个对应于所述多个区域中的一个，用于在定时 对应于由数据边缘位置检测单元检测到接收数据的上升沿的区域的时钟。

公开(公告)号：US5115332A

公开(公告)日：1992-05-19

申请号：US553744

申请日：1990-07-18

申请人： Takao Naito ,  Terumi Chikama ,  Shigeki Watanabe ,  Tetsuya Kiyonaga ,  Yoshihito Onoda ,  Hideo Kuwahara

发明人： Takao Naito ,  Terumi Chikama ,  Shigeki Watanabe ,  Tetsuya Kiyonaga ,  Yoshihito Onoda ,  Hideo Kuwahara

IPC分类号： H04B10/2513 ,  H04B10/61 ,  H04B10/63 ,  H04B10/64

CPC分类号： H04B10/61 ,  H04B10/2513 ,  H04B10/613 ,  H04B10/63 ,  H04B10/64

摘要： A receiver for coherent optical communication in a phase diversity system. An optical hybrid circuit receives a signal beam and receives a local-oscillator beam which has a predetermined phase shift. The optical hybrid circuit branches each beam into pairs, each pair having one signal beam and one local-oscillator beam. These beam pairs are output to first and second photodetectors which each apply a photoelectric conversion, thus producing first and second output signals. The output signals are output to an electrical 90.degree. hybrid circuit which shifts the first signal by 90.degree. and adds it to the second signal to produce a first output signal, and shifts the second signal by 90.degree. and adds it to the first signal to produce a second output signal. The first and second output signals are applied to first and second demodulators, respectively, which delay the signals by a delay corresponding to their frequency. The demodulators output the delayed signals to an adder which adds the two signals to produce an output signal. As a result, the receiver is capable of compensating the wavelength dispension is an optical fiber to secure an enhanced receiving sensitivity.

公开(公告)号：US5052051A

公开(公告)日：1991-09-24

申请号：US424732

申请日：1989-10-20

申请人： Takao Naito ,  Terumi Chikama ,  Shigeki Watanabe ,  Tetsuya Kiyonaga ,  Yoshihito Onoda

发明人： Takao Naito ,  Terumi Chikama ,  Shigeki Watanabe ,  Tetsuya Kiyonaga ,  Yoshihito Onoda

IPC分类号： G02F2/00 ,  H04B10/07 ,  H04B10/516 ,  H04B10/61

CPC分类号： H04B10/61 ,  H04B10/614 ,  H04B10/64

摘要： After mixing the signal light and the local oscillation light with a mixing circuit, two intersecting polarization components are divided by a polarization splitter and respective components are subjected to heterodyne detection by optical receivers. Thereafter, in an electric signal stage, the intermediate frequency signal outputted from the optical receivers are applied to a 90-degree hybrid coupler and the output signal from one of the output ports is demodulated by a demodulator. On the other hand, an intermediate frequency signal outputted from the optical receivers are subjected to a subtraction to provide a principal axis angle monitor signal for the signal light. The signal outputted from the output port from the 90-degree hybrid coupler is used to monitor the elliptic ratio of the signal light and these monitor signals are applied to the polarization control circuit. The polarization control circuit drives the polarization operation apparatus based on said monitor signal to control the polarization state (i.e. a principal axis angle and the elliptic ratio) of the signal light to achieve the optimum state.