公开(公告)号：US06420962B1

公开(公告)日：2002-07-16

申请号：US09736237

申请日：2000-12-15

申请人： Yoshihiro Matsumoto ,  Takashi Kuriyama ,  Yoshinori Honma ,  Tsutomu Tajima ,  Masashi Tachigori ,  Toshibumi Kawano ,  Hirokazu Kobayashi ,  Masaki Shiraiwa ,  Kenzou Tan

发明人： Yoshihiro Matsumoto ,  Takashi Kuriyama ,  Yoshinori Honma ,  Tsutomu Tajima ,  Masashi Tachigori ,  Toshibumi Kawano ,  Hirokazu Kobayashi ,  Masaki Shiraiwa ,  Kenzou Tan

IPC分类号： G95B100

CPC分类号： H04L7/033 ,  H04L7/0037 ,  H04L25/061 ,  H04L25/066

摘要： The present invention provides an automatic identification level control circuit, an identification level control method, an automatic identification phase control circuit, an identification phase control method, and an optical receiver, capable of stably setting an optimal identification level or identification phase. An automatic identification level control circuit of the present invention includes a coupling capacitor, an identification circuit, a level fluctuation detection circuit, an identification voltage control circuit, and a low-pass filter. The identification circuit includes limiter amplifiers and flip flops. The level fluctuation detection circuit includes exclusive OR circuits.

摘要翻译： 本发明提供能够稳定地设定最佳识别水平或识别阶段的自动识别电平控制电路，识别电平控制方法，自动识别相位控制电路，识别相位控制方法和光接收机。 本发明的自动识别电平控制电路包括耦合电容器，识别电路，电平波动检测电路，识别电压控制电路和低通滤波器。 识别电路包括限幅放大器和触发器。 电平波动检测电路包括异或电路。

公开(公告)号：US07920559B2

公开(公告)日：2011-04-05

申请号：US12046954

申请日：2008-03-12

申请人： Naoya Shiota ,  Daisuke Uehara ,  Tsutomu Tajima

发明人： Naoya Shiota ,  Daisuke Uehara ,  Tsutomu Tajima

IPC分类号： H04L25/49

CPC分类号： H04J3/1611 ,  H04J3/0605

摘要： The transponder includes a 64B/66B code synchronization bit determination circuit 1511a for notifying a PLL selection control circuit of a control signal which instructs on selection of a variable oscillator or a variable oscillator in response to a case where an electric signal sent from an optical signal reception unit 111 includes a 64B/66B code synchronization bit, an A1A2 byte determination circuit 1511b for notifying the PLL selection control circuit of a control signal which instructs on selection of a variable oscillator or a variable oscillator in response to a case where an electric signal sent from the optical signal reception unit 111 includes an A1A2 byte, and the PLL selection control circuit 1512 for controlling a PLL selector 16 and a PLL selector 17 based on a control signal.

摘要翻译： 应答器包括64B / 66B代码同步位确定电路1511a，用于响应于从光信号发送的电信号通知PLL选择控制电路的控制信号，该控制信号指示可选振荡器或可变振荡器的选择 接收单元111包括64B / 66B代码同步位，A1A2字节确定电路1511b，用于响应于电信号的情况向PLL选择控制电路通知指示选择可变振荡器或可变振荡器的控制信号 从光信号接收单元111发送的A1A2字节和用于根据控制信号控制PLL选择器16和PLL选择器17的PLL选择控制电路1512。

公开(公告)号：US5726794A

公开(公告)日：1998-03-10

申请号：US579203

申请日：1995-12-27

申请人： Tsutomu Tajima

发明人： Tsutomu Tajima

IPC分类号： G02F1/03 ,  G02F1/01 ,  H01S5/026 ,  H01S5/042 ,  H04L27/04 ,  H01S3/00 ,  H04L25/06

CPC分类号： H04L27/04 ,  G02F1/0123 ,  H01S5/0265 ,  H01S5/0427

摘要： A DC bias controller for an optical modulator includes an optical modulator, a demultiplexer, and a controller. The optical modulator intensity-modulates input DC light by a digital main signal superposed with a DC voltage to convert the DC light to an optical signal. The demultiplexer demultiplexes the optical signal from the optical modulator into output signal light and monitor signal light. The controller detects a change in modulation characteristics of the optical modulator on the basis of the monitor signal light from the demultiplexer to control a value of the DC voltage superposed on the digital main signal.

摘要翻译： 用于光调制器的DC偏置控制器包括光调制器，解复用器和控制器。 光调制器通过叠加有直流电压的数字主信号来强制调制输入DC光，以将DC光转换成光信号。 解复用器将来自光调制器的光信号解复用为输出信号光并监视信号光。 控制器基于来自解复用器的监视信号光检测光调制器的调制特性的变化，以控制叠加在数字主信号上的直流电压的值。

公开(公告)号：US6055093A

公开(公告)日：2000-04-25

申请号：US833121

申请日：1997-04-04

申请人： Tadayuki Chikuma ,  Tsutomu Tajima

发明人： Tadayuki Chikuma ,  Tsutomu Tajima

IPC分类号： G02F1/35 ,  H01S3/06 ,  H01S3/067 ,  H01S3/07 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/10 ,  H04B10/077 ,  H04B10/079 ,  H04B10/296 ,  H04J14/00 ,  H04J14/02 ,  H01S3/16 ,  H04B10/12

CPC分类号： H04B10/296 ,  H04B10/2942

摘要： A wavelength multiplexing optical transmitting apparatus includes a plurality of optical transmitters for transmitting optical signals having mutually different wavelengths, a wavelength multiplexing circuit for wavelength multiplexing optical signals, an optical amplifier for directly amplifying the wavelength multiplexed optical signal and for producing an amplified multiplexed optical signal, an optical signal counting detector for branching the amplified multiplexed optical signal into signals of the respective wavelengths and for detecting the number of optical signals presently being transmitted, and an optical amplifier control circuit for controlling an output from the optical amplifier according to the number of optical signals; the optical amplifier includes a fiber made of a material to which a rare earth element is added and an excitation light to the fiber; the optical amplifier control circuit includes an excitation light control circuit for controlling an intensity of the excitation light according to the number of light signals; wherein to obtain an intensity of amplified optical signal predetermined according to the number of light signals, the excitation light control circuit sets an injection current to the excitation light source.

摘要翻译： 一种波分复用光发送装置，包括用于发送具有相互不同波长的光信号的多个光发射机，用于波长复用光信号的波长复用电路，用于直接放大波分复用光信号的光放大器，以及用于产生放大的复用光信号 光信号计数检测器，用于将放大的多路复用光信号分离成各波长的信号，并检测当前正在传输的光信号的数量;以及光放大器控制电路，用于根据光放大器的数量控制光放大器的输出 光信号; 光放大器包括由添加有稀土元素的材料和对光纤的激发光制成的光纤; 光放大器控制电路包括：激励光控制电路，用于根据光信号的数量控制激发光的强度; 为了获得根据光信号数预定的放大光信号的强度，激发光控制电路对激发光源设定注入电流。

公开(公告)号：US5926304A

公开(公告)日：1999-07-20

申请号：US814870

申请日：1997-03-11

申请人： Tsutomu Tajima

发明人： Tsutomu Tajima

IPC分类号： G02B6/00 ,  H04B10/077 ,  H04B10/079 ,  H04B10/29 ,  H04B10/294 ,  H04B10/08

CPC分类号： H04B10/2931 ,  H04B10/2912

摘要： An optical fiber amp repeater, provided on an optical transmission channel in an optical system, having an excitation light output section for supplying an excitation light for amplifying a received optical signal, and a main signal light amplifier section for supplying the optical signal which is amplified while going through the rare earth dope fiber after combining the received optical signal with the excitation light supplied from the excitation light output section, the excitation light output section including an excitation light source for transmitting the excitation light and an excitation light source driving circuit for driving the excitation light source, the excitation light source driving circuit controlling the excitation light source according to a given data and modulating the excitation light by high frequency wave, thereby to create an auxiliary signal containing the given data.

摘要翻译： 一种设置在光学系统的光传输通道上的光纤放大中继器，具有用于提供用于放大接收到的光信号的激发光的激发光输出部分，以及用于提供被放大的光信号的主信号光放大部分 在将接收到的光信号与从激发光输出部提供的激励光合并之后经过稀土掺杂光纤，激发光输出部包括用于透射激发光的激发光源和用于驱动的​​激励光源驱动电路 激励光源，激励光源驱动电路根据给定数据控制激发光源，并通过高频波调制激发光，从而产生包含给定数据的辅助信号。

公开(公告)号：US5768000A

公开(公告)日：1998-06-16

申请号：US777349

申请日：1996-12-27

申请人： Tsutomu Tajima

发明人： Tsutomu Tajima

IPC分类号： G02F1/35 ,  H01S3/06 ,  H01S3/067 ,  H01S3/10 ,  H04B10/07 ,  H04B10/29 ,  H04B10/296 ,  H04B10/54 ,  H04B10/564 ,  H04J1/00 ,  H04J14/02 ,  H04B10/17

CPC分类号： H04B10/296 ,  H04J14/0221

摘要： In a wavelength multiplexing optical transmission device, first and second optical transmission boards output optical signals which have wavelengths different from each other and on which different sine-wave signals are superposed. The optical signals are coupled by an optical coupler, then divided into two lights by an optical divider. One optical signal is amplified by an optical amplifier. the other optical signal is converted into an electrical signal by a photodiode. The sine-wave signal components are extracted by first and second bandpass filters with the existence of the extracted signals being detected by output detectors. An adder output a reference voltage signal with a voltage according to the number of signals detected. A gain control circuit controls the amplification gain based on a voltage value corresponding to the intensity of an optical signal to be output and the reference voltage value, so that the level of output light can be controlled according to the number of optical signals.

摘要翻译： 在波长复用光传输装置中，第一和第二光传输板输出具有彼此不同的波长的光信号，并且在其上重叠不同的正弦波信号。 光信号由光耦合器耦合，然后由光分路器分成两个光。 一个光信号由光放大器放大。 另一个光信号由光电二极管转换成电信号。 正弦波信号分量由第一和第二带通滤波器提取，提取的信号的存在由输出检测器检测。 加法器根据检测到的信号数量输出具有电压的参考电压信号。 增益控制电路基于与要输出的光信号的强度对应的电压值和参考电压值来控制放大增益，使得可以根据光信号的数量来控制输出光的电平。

公开(公告)号：US4864649A

公开(公告)日：1989-09-05

申请号：US89461

申请日：1987-08-26

申请人： Tsutomu Tajima ,  Toru Hamanaka

发明人： Tsutomu Tajima ,  Toru Hamanaka

IPC分类号： G02F1/00 ,  H04B1/74 ,  H04B10/03 ,  H04B10/07 ,  H04B10/2507 ,  H04B10/293 ,  H04B10/516 ,  H04B10/564 ,  H04B10/572 ,  H04B10/61

CPC分类号： H04B10/5161 ,  H04B10/504 ,  H04B10/541

摘要： A driver circuit for driving a light emitting element with a signal generated by superimposing an analog sub-information signal over the pulse string of a digital main signal. The driver circuit includes an input interception detector for detecting any interception of the digital main signal, and a gain-controlled amplifier for increasing the gain of the analog sub-information signal when the digital signal is intercepted.

摘要翻译： 一种用于通过在数字主信号的脉冲串上叠加模拟子信息信号产生的信号来驱动发光元件的驱动电路。 驱动器电路包括用于检测数字主信号的任何截取的输入拦截检测器，以及用于在数字信号被截取时增加模拟子信息信号的增益的增益控制放大器。