公开(公告)号：US5440418A

公开(公告)日：1995-08-08

申请号：US80113

申请日：1993-06-23

申请人： Katsuhiro Ishimura ,  Hiroshi Takamoto ,  Shusei Aoki

发明人： Katsuhiro Ishimura ,  Hiroshi Takamoto ,  Shusei Aoki

IPC分类号： H04B10/07 ,  H04B10/077 ,  H04B10/29 ,  H04B10/08

CPC分类号： H04B10/291 ,  H04B10/0777 ,  H04B2210/078

摘要： Each optical repeater in an optical transmission system includes an optical amplifier, and a control circuit for controlling the optical transmission. Furthermore, each optical repeater transmits management information to the next optical repeater. The control circuit checks the status of the optical amplifier and obtains monitoring information. The control circuit generates management information in accordance with the monitoring information and the management information transmitted from the upstream side optical repeater. The management information is converted to an optical signal and transmitted to the next optical repeater. A receiving station receives the management information. The management information includes an ID code for an optical repeater which has failed and the status of the failure. Different categories of management information have priorities which can be changed by the receiving station, and thus the receiving station can detect the status of the optical transmission line easily and flexibly.

摘要翻译： 光传输系统中的每个光中继器包括光放大器和用于控制光传输的控制电路。 此外，每个光中继器向下一个光中继器发送管理信息。 控制电路检查光放大器的状态并获得监控信息。 控制电路根据从上游侧光中继器发送的监视信息和管理信息，生成管理信息。 管理信息被转换为光信号并传送到下一个光中继器。 接收站接收管理信息。 管理信息包括已经失败的光中继器的ID码和故障状态。 不同类别的管理信息具有可由接收站改变的优先级，因此接收站可以容易且灵活地检测光传输线的状态。

公开(公告)号：US4992922A

公开(公告)日：1991-02-12

申请号：US392293

申请日：1989-08-11

申请人： Katsuhiro Ishimura ,  Shusei Aoki

发明人： Katsuhiro Ishimura ,  Shusei Aoki

IPC分类号： H01L31/02 ,  H02M7/10 ,  H04B10/40 ,  H04B10/50 ,  H04B10/60 ,  H04B10/67 ,  H04B10/69

CPC分类号： H01L31/02027 ,  H02M7/10 ,  H02M7/103

摘要： In a variable high-voltage generating circuit for an avalanche photodiode, a pulse oscillating circuit generates pulses, a current driving circuit current-amplifies the pulses, a Cockcroft-Walton circuit boosts and rectifies the pulses from the current driving circuit, and a low-pass filter is connected at the output of the Cockcroft-Walton circuit. The avalanche photodiode is connected in series with a first resistor, and the series connection is connected to receive the output of the low-pass filter. A series connection of a transistor and a second resistor is connected in parallel with the series connection of the avalanche diode and the first resistor. A control circuit applies a variable signal to the base of the transistor, thereby to vary the voltage applied across the APD.

摘要翻译： 在用于雪崩光电二极管的可变高压发生电路中，脉冲振荡电路产生脉冲，电流驱动电路对脉冲进行电流放大，Cockcroft-Walton电路升压并整流来自电流驱动电路的脉冲， 通路滤波器连接在Cockcroft-Walton电路的输出端。 雪崩光电二极管与第一电阻串联连接，并串联连接以接收低通滤波器的输出。 晶体管和第二电阻器的串联连接与雪崩二极管和第一电阻器的串联连接并联。 控制电路将可变信号施加到晶体管的基极，从而改变施加在APD上的电压。

公开(公告)号：US06400497B1

公开(公告)日：2002-06-04

申请号：US08555901

申请日：1995-11-13

申请人： Mikiya Suzuki ,  Shigeru Shikii ,  Yukihiro Ozeki ,  Shusei Aoki

发明人： Mikiya Suzuki ,  Shigeru Shikii ,  Yukihiro Ozeki ,  Shusei Aoki

IPC分类号： H04B1016

CPC分类号： H04B10/2941 ,  H01S3/06758 ,  H01S2301/04 ,  H04B10/291 ,  H04B10/2912

摘要： An EDFA 1 is comprised of a pre-amp 2 and a post-amp 3, which are connected in series, a photocoupler 4, a long wave pass filter (LWPF) 5 and an LWPF controller 6. The photocoupler 4 is connected to an input-stage of the EDFA 1 and enters the light signal in the LWPF controller 6. The LWPF 5 is located between the pre-amp 2 and the post-amp 3, and its cutoff wavelength is adjustable. A short-wavelength-part of the light signal which is amplified by the pre-amp 2, is cut off by the LWPF 5. The LWPF controller 6 detects an input signal power of the input light signal and adjusts the cutoff wavelength of the LWPF 5 based on the detected input signal power. Gain of light signals which are output from the post-amp 3, are equalized ranging the extensive input signal power and covering wide signal-wavelength bands.

摘要翻译： EDFA 1包括串联连接的前置放大器2和后置放大器3，光电耦合器4，长波通滤波器（LWPF）5和LWPF控制器6.光电耦合器4连接到 EDFA 1的输入级，并将光信号输入到LWPF控制器6中.LWPF 5位于前置放大器2和后置放大器3之间，其截止波长可调。 由前置放大器2放大的光信号的短波长部分被LWPF5切断.LWPF控制器6检测输入光信号的输入信号功率并调节LWPF的截止波长 5基于检测到的输入信号功率。 从后置放大器3输出的光信号的增益被均衡到广泛的输入信号功率和覆盖宽的信号波长带。