公开(公告)号：US5636048A

公开(公告)日：1997-06-03

申请号：US406200

申请日：1995-03-16

申请人： Kazuhisa Kogure ,  Hirokazu Osada ,  Yasuhiro Tanaka ,  Hiroo Kitasagami ,  Makoto Miyoshi ,  Kakuji Inoue ,  Takayoshi Ikegami ,  Kenichi Kobayashi ,  Shinichiro Sano ,  Setsuo Misaizu ,  Masahiko Yamashita ,  Tatsuya Nishimura

发明人： Kazuhisa Kogure ,  Hirokazu Osada ,  Yasuhiro Tanaka ,  Hiroo Kitasagami ,  Makoto Miyoshi ,  Kakuji Inoue ,  Takayoshi Ikegami ,  Kenichi Kobayashi ,  Shinichiro Sano ,  Setsuo Misaizu ,  Masahiko Yamashita ,  Tatsuya Nishimura

IPC分类号： H03G3/20 ,  H03F3/08 ,  H03F3/34 ,  H03F3/45 ,  H03G3/30 ,  H04B3/04 ,  H04B10/07 ,  H04B10/2507 ,  H04B10/293 ,  H04B10/294 ,  H04B10/299 ,  H04B10/564 ,  H04B10/572 ,  H04L25/03 ,  H04B10/06

CPC分类号： H04B10/6933 ,  H03F3/08 ,  H03G3/3084 ,  H04B10/6931 ,  H04L25/063

摘要： In an equalizing amplifier that equalizes an electric signal obtained from a light signal received via an optical transmission path, an AGC circuit generates first and second signals from the electric signal by referring to a threshold voltage. The first and second signals are complementary signals. An offset compensation circuit generates a first difference signal based on a difference between the first and second signals, compares the first difference signal with a first reference signal, and outputs, as the threshold voltage, a resultant error signal to the AGC circuit. The threshold voltage is varied so that it is located in the center of an amplitude of the electric signal whereby an offset of the AGC circuit can be compensated for.

摘要翻译： 在均衡放大器中，均衡从经由光传输路径接收的光信号获得的电信号，AGC电路通过参考阈值电压从电信号产生第一和第二信号。 第一和第二信号是互补信号。 偏移补偿电路基于第一和第二信号之间的差产生第一差分信号，将第一差分信号与第一参考信号进行比较，并将所得到的误差信号作为阈值电压输出到AGC电路。 阈值电压变化，使其位于电信号幅度的中心，从而可以补偿AGC电路的偏移。

公开(公告)号：US20050249444A1

公开(公告)日：2005-11-10

申请号：US10628553

申请日：2003-07-29

申请人： Keisuke Imai ,  Toru Yamazaki ,  Kakuji Inoue ,  Setsuo Misaizu ,  Yasunori Nagakubo

发明人： Keisuke Imai ,  Toru Yamazaki ,  Kakuji Inoue ,  Setsuo Misaizu ,  Yasunori Nagakubo

IPC分类号： G02F1/03 ,  G02F1/01 ,  G02F1/035

CPC分类号： G02F1/0123 ,  H04B10/505 ,  H04B10/50572 ,  H04B10/50575 ,  H04B10/58

摘要： An optical transmitter comprises an amplitude modulation unit performing amplitude modulation of only a one-side amplitude of a main signal with a low-frequency signal having a predetermined frequency. An optical modulator receives an input signal generated after the one-side amplitude modulation, and modulates an incoming light in response to the received signal in accordance with a predetermined modulation-characteristic curve to output an optical output signal. An operating point control unit applies a predetermined bias voltage to the optical modulator to control a level of the input signal substantially applied to the modulation-characteristic curve so that the one-side amplitude of the main signal is applied to a minimum portion of the modulation-characteristic curve of the optical modulator.

摘要翻译： 光发射机包括幅度调制单元，其具有仅具有具有预定频率的低频信号的主信号的单侧振幅的幅度调制。 光调制器接收在单侧幅度调制之后产生的输入信号，并且根据预定的调制特性曲线响应于接收信号调制入射光以输出光输出信号。 操作点控制单元向光调制器施加预定的偏置电压以控制基本上施加到调制特性曲线的输入信号的电平，使得主信号的单侧振幅被施加到调制的最小部分 - 光学调制器的特征曲线。

公开(公告)号：US5706117A

公开(公告)日：1998-01-06

申请号：US570406

申请日：1995-12-11

申请人： Keisuke Imai ,  Setsuo Misaizu ,  Mitsuharu Noda ,  Hiroshi Yamada

发明人： Keisuke Imai ,  Setsuo Misaizu ,  Mitsuharu Noda ,  Hiroshi Yamada

IPC分类号： G02F1/015 ,  B82Y20/00 ,  G02F1/01 ,  H01S5/00 ,  H01S5/026 ,  H04B10/04

CPC分类号： H04B10/25137 ,  G02F1/0123 ,  G02F2001/0157 ,  H01S5/0265

摘要： An optical transmitter including a light source for outputting a carrier light, an electro-absorption optical modulator for absorbing the carrier light according to an applied voltage to thereby output an intensity-modulated signal light, a device for applying an offset voltage to the optical modulator so that the applied voltage enters a region where the generation of the carrier light in the light source is stable, and a device for receiving an input signal to superimpose a modulation signal corresponding to the input signal on the offset voltage. This optical transmitter prevents wavelength chirping of the light source due to residual reflection in the optical modulator to thereby allow improvement in waveform.

摘要翻译： 一种包括用于输出载体光的光源的光发射器，用于根据所施加的电压吸收载波的电吸收光调制器，从而输出强度调制的信号光，用于向光调制器施加偏移电压的装置 使得施加的电压进入光源中的载波光的产生稳定的区域，以及用于接收输入信号以将与输入信号相对应的调制信号叠加在偏移电压上的装置。 该光学发射器防止由于光调制器中的残留反射引起的光源的波长啁啾，从而允许改善波形。

公开(公告)号：US5646763A

公开(公告)日：1997-07-08

申请号：US528321

申请日：1995-09-14

申请人： Setsuo Misaizu ,  Sunao Itou ,  Takashi Tsuda

发明人： Setsuo Misaizu ,  Sunao Itou ,  Takashi Tsuda

IPC分类号： H04B10/40 ,  H01S5/00 ,  H01S5/30 ,  H04B10/079 ,  H04B10/50 ,  H04B10/524 ,  H04B10/54 ,  H04B10/564 ,  H04B10/60 ,  H04B10/04

CPC分类号： H04B10/504

摘要： An optical transmitter includes a laser diode module including a laser diode which outputs a light signal to a transmission line, a driving unit which drives the laser diode in accordance with an input signal indicative of data to be transmitted, and a coupling unit for connecting an output of the driving unit to an input of the laser diode module. The coupling unit allows an alternating current to flow through the laser diode and inhibits the output of the driving unit from being subjected to a direct current from the laser diode module.

摘要翻译： 一种光发射机包括：激光二极管模块，包括将光信号输出到传输线的激光二极管;驱动单元，其根据表示要传输的数据的输入信号驱动激光二极管;以及耦合单元， 驱动单元的输出到激光二极管模块的输入。 耦合单元允许交流电流流过激光二极管并且阻止驱动单元的输出经受来自激光二极管模块的直流电流。

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：US5900959A

公开(公告)日：1999-05-04

申请号：US763110

申请日：1996-12-10

申请人： Mitsuharu Noda ,  Setsuo Misaizu ,  Motoyoshi Sekiya ,  Yasunori Nagakubo

发明人： Mitsuharu Noda ,  Setsuo Misaizu ,  Motoyoshi Sekiya ,  Yasunori Nagakubo

IPC分类号： H04B10/00 ,  H04B10/071 ,  H04B10/2537 ,  H04B10/54 ,  H04B10/588 ,  H04B10/04

CPC分类号： H04B10/2537

摘要： An optical transmitter comprises a first unit for generating an optical signal having a bandwidth given by a main signal, a second unit modulating the optical signal according to a control signal to extend the bandwidth of the optical signal, a third unit extracting backward light including SBS(stimulated Brillouin scattering) light generated in an optical fiber transmission line, and a fourth unit performing feedback control so that the power of the SBS light becomes substantially constant. Through the structure of the optical transmitter good transmission characteristics of a main signal are obtained and the suppression of the SBS is allowed.

摘要翻译： 光发射机包括：第一单元，用于产生具有由主信号给出的带宽的光信号;第二单元，根据控制信号调制光信号以扩展光信号的带宽;第三单元，提取包括SBS的向后光 （受激布里渊散射）光，以及执行反馈控制的第四单元，使得SBS光的功率变得基本恒定。 通过光发射机的结构获得了主信号的良好传输特性，并允许SBS的抑制。

公开(公告)号：US07382987B2

公开(公告)日：2008-06-03

申请号：US10821853

申请日：2004-04-12

申请人： Setsuo Misaizu ,  Yuko Yoshida ,  Tetsuji Sato

发明人： Setsuo Misaizu ,  Yuko Yoshida ,  Tetsuji Sato

IPC分类号： H04B10/06

CPC分类号： H03F3/087 ,  H03G3/3084 ,  H03K5/082 ,  H04B10/695 ,  H04L25/063

摘要： An identification level control method and an optical receiver are disclosed to determine an optimal identification level in a simple structure without clock extraction. In the identification level control method, an identification level supplied to a limiter amplifier is changed from a lower bound to an upper bound thereof and is stored together with an output average of the limiter amplifier. Then, a first average and a second average are set based on the output average. A first identification level corresponding to the first average and a second identification level corresponding to the second average are obtained, and an optimal identification level is computed based on the first identification level and the second identification level, and is supplied to the limiter amplifier.

摘要翻译： 公开了一种识别电平控制方法和光接收器，以便在没有时钟提取的情况下以简单结构确定最佳识别电平。 在识别电平控制方法中，提供给限幅放大器的识别电平从下限变化到其上限，并与限幅放大器的输出平均值一起存储。 然后，基于输出平均值设定第一平均值和第二平均值。 获得与第一平均值对应的第一识别电平和与第二平均值对应的第二识别电平，并且基于第一识别电平和第二识别电平来计算最佳识别电平，并将其提供给限幅放大器。

公开(公告)号：US06807245B2

公开(公告)日：2004-10-19

申请号：US10211232

申请日：2002-08-05

申请人： Sadao Ibukuro ,  Setsuo Misaizu ,  Isao Nakajima

发明人： Sadao Ibukuro ,  Setsuo Misaizu ,  Isao Nakajima

IPC分类号： H03D324

CPC分类号： H04L7/033 ,  H03L7/085

摘要： There is provided a PLO device which performs high-accuracy, high-quality clock recovery. A shifted data generation part generates shifted data, and a first phase comparison part outputs first difference data. A first filter removes an alternating-current component from the first difference data and outputs a first detection voltage. A delay part delays input data for a time corresponding to half of one time slot with the use of an analog delay element and outputs delayed data. A second phase comparison part compares the phases of the input data and delayed data with each other and outputs second difference data. A second filter removes an alternating-current component from the second difference data and outputs a second detection voltage. An arithmetic section divides the first detection voltage by the second detection voltage to obtain a control voltage. A clock oscillation section outputs recovered clock based on the control voltage.

摘要翻译： 提供了一种执行高精度，高质量时钟恢复的PLO设备。 移位数据生成部生成移位数据，第一相位比较部输出第一差分数据。 第一滤波器从第一差分数据中去除交流分量并输出第一检测电压。 延迟部分使用模拟延迟元件在一个时隙的一半时间内延迟输入数据并输出延迟数据。 第二相位比较部分将输入数据和延迟数据的相位彼此进行比较，并输出第二差分数据。 第二滤波器从第二差分数据中去除交流分量并输出第二检测电压。 运算部将第一检测电压除以第二检测电压，得到控制电压。 时钟振荡部分根据控制电压输出恢复时钟。

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。

公开(公告)号：US06229833B1

公开(公告)日：2001-05-08

申请号：US09274248

申请日：1999-03-23

申请人： Mitsuharu Noda ,  Motoyoshi Sekiya ,  Setsuo Misaizu ,  Tetsuya Kiyonaga ,  Nobuaki Sato ,  Yasunori Nagakubo

发明人： Mitsuharu Noda ,  Motoyoshi Sekiya ,  Setsuo Misaizu ,  Tetsuya Kiyonaga ,  Nobuaki Sato ,  Yasunori Nagakubo

IPC分类号： H01S300

CPC分类号： H01S5/06825 ,  H01S5/042 ,  H01S5/06804

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。