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：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：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.

公开(公告)号：US20050105917A1

公开(公告)日：2005-05-19

申请号：US10959487

申请日：2004-10-07

申请人： Hidehiko Narusawa ,  Tetsuya Kiyonaga

发明人： Hidehiko Narusawa ,  Tetsuya Kiyonaga

IPC分类号： G02F1/035 ,  G02F1/03 ,  H04B10/04

CPC分类号： H04B10/50575 ,  H04B10/58

摘要： The direct control of a change in output amplitude of the modulator driver resulting from changes in the ambient environment or by aging is difficult because deterioration is generated in the drive waveform under the condition that the drive signal of the radio frequency is output from the modulator driver of the Mach-Zehnder modulator. A low frequency element included in the modulator output is monitored by superimposing the low frequency signals under the in-phase condition to two envelopes corresponding to the H input and L input of the drive signal. Amplitude of the drive signal outputted from the modulator driver can be adjusted without deterioration of the drive waveform.

摘要翻译： 由于周围环境的变化或老化引起的调制器驱动器的输出振幅的变化的直接控制是困难的，因为在从调制器驱动器输出射频的驱动信号的条件下在驱动波形中产生劣化 的马赫 - 曾德调制器。 通过将同相状态下的低频信号叠加到与驱动信号的H输入和L输入对应的两个信封来监视包括在调制器输出中的低频元件。 可以调节从调制器驱动器输出的驱动信号的幅度，而不会降低驱动波形。

公开(公告)号：US06590686B1

公开(公告)日：2003-07-08

申请号：US09353313

申请日：1999-07-14

申请人： Motoyoshi Sekiya ,  Tetsuya Kiyonaga ,  Yoshitaka Shimura

发明人： Motoyoshi Sekiya ,  Tetsuya Kiyonaga ,  Yoshitaka Shimura

IPC分类号： H04B1004

CPC分类号： H04B10/572 ,  H04B10/503 ,  H04B10/564

摘要： Disclosed herein is an optical transmitter suitable for stabilization of the output power and wavelength of an optical signal. The optical transmitter includes a light source for outputting a light beam, an external modulator for modulating the light beam according to a main signal to thereby output an optical signal, a power monitor for detecting the power of the optical signal output from the external modulator, and a control unit for controlling the light source so that the power detected by the power monitor becomes stable. The light source is controlled according to the power detected on the downstream side of the external modulator, so that the output power of the optical signal to be obtained can be maintained constant with high accuracy irrespective of variations in loss by the external modulator.

摘要翻译： 本文公开了一种适于稳定光信号的输出功率和波长的光发射机。 光发射机包括用于输出光束的光源，根据主信号调制光束的外部调制器，从而输出光信号;功率监视器，用于检测从外部调制器输出的光信号的功率， 以及控制单元，用于控制光源，使得由功率监视器检测的功率变得稳定。 根据在外部调制器的下游侧检测到的功率来控制光源，使得要获得的光信号的输出功率可以以高精度保持恒定，而与外部调制器的损耗变化无关。

公开(公告)号：US06483625B2

公开(公告)日：2002-11-19

申请号：US09998694

申请日：2001-12-03

申请人： Yoshitaka Shimura ,  Motoyoshi Sekiya ,  Tetsuya Kiyonaga

发明人： Yoshitaka Shimura ,  Motoyoshi Sekiya ,  Tetsuya Kiyonaga

IPC分类号： H04B1004

CPC分类号： H04B10/506 ,  H01S5/042 ,  H01S5/0617 ,  H01S5/06825 ,  H01S5/06837 ,  H01S5/0687 ,  H01S5/1032 ,  H04B10/564 ,  H04B10/572

摘要： A WDM optical transmission apparatus of the present invention comprises: a light source (1) for generating light whose wavelength is changed according to the temperature and a drive current; a temperature control section (4) for controlling the temperature of the light source so that a wavelength at the starting of emission of the light source is stabilized in an allowable range of optical output wavelength set in advance; a drive current control section (5) for controlling the drive current applied to the light source according to the allowable range of the optical output wavelength; a wavelength control section (3) for detecting a wavelength of light output from the light source and controlling the temperature of the light source based on the detection result, to lead the optical output wavelength into the vicinity of a predetermined target wavelength; and an operation control section (6) for controlling the start and stop of the control operation of each section at predetermined timing respectively corresponding to the time of optical output generation and the time of optical output stop.

摘要翻译： 本发明的WDM光传输装置包括：用于产生根据温度和驱动电流而波长变化的光的光源（1）; 温度控制部分（4），用于控制光源的温度，使得光源发射的波长在预先设定的光输出波长的允许范围内稳定; 驱动电流控制部分（5），用于根据光输出波长的允许范围来控制施加到光源的驱动电流; 用于检测从光源输出的光的波长并根据检测结果控制光源的温度的波长控制部分（3），以将光输出波长引导到预定目标波长附近; 以及操作控制部分（6），用于分别对应于光输出产生时间和光输出停止时间的预定定时控制每个部分的控制操作的开始和停止。

公开(公告)号：US6097746A

公开(公告)日：2000-08-01

申请号：US41752

申请日：1998-03-13

申请人： Mitsuharu Noda ,  Motoyoshi Sekiya ,  Setsuo Misaizu ,  Tetsuya Kiyonaga

发明人： Mitsuharu Noda ,  Motoyoshi Sekiya ,  Setsuo Misaizu ,  Tetsuya Kiyonaga

IPC分类号： H01S5/042 ,  H01S5/068 ,  H01S5/0683 ,  H01S3/00

CPC分类号： H01S5/06825 ,  H01S5/06804 ,  H01S5/0683

摘要： Disclosed is a laser diode protecting circuit adapted to prevent a laser diode from producing an excessive emission when the laser diode is driven at low temperature, thereby assuring that the laser diode will not be damaged or degraded in terms of its characteristic. When the laser diode is started at low temperature, a laser diode protecting circuit has a power monitor circuit for monitoring backward power of the laser diode and a laser diode current limiting circuit for limiting the laser diode current when the backward power becomes equal to the set power. When the laser diode temperature subsequently rises and the backward power falls below the set power, an automatic current control circuit performs automatic current control in such a manner that the laser diode current attains a set current value. Alternatively, a temperature monitor circuit monitors the temperature of the laser diode and the laser diode current limiting circuit limits the laser diode current when the monitored temperature of the laser diode is less than the set temperature. When the laser diode temperature exceeds the set temperature, the automatic current control circuit performs automatic current control in such a manner that the laser diode attains the set current value.

摘要翻译： 公开了一种激光二极管保护电路，其适于在激光二极管在低温下被驱动时防止激光二极管产生过多的发射，从而确保激光二极管在其特性方面不会被损坏或劣化。 当激光二极管在低温下启动时，激光二极管保护电路具有用于监视激光二极管反向功率的功率监控电路和激光二极管限流电路，用于在反向功率等于设定值时限制激光二极管电流 功率。 当激光二极管温度随后上升并且反向功率下降到设定功率以下时，自动电流控制电路以激光二极管电流达到设定电流值的方式进行自动电流控制。 或者，温度监视电路监测激光二极管的温度，激光二极管限流电路在激光二极管的监视温度小于设定温度时限制激光二极管电流。 当激光二极管温度超过设定温度时，自动电流控制电路以激光二极管达到设定电流值的方式进行自动电流控制。