公开(公告)号：US06377373B1

公开(公告)日：2002-04-23

申请号：US09118732

申请日：1998-07-17

申请人： Toshio Kawazawa ,  Koji Goto

发明人： Toshio Kawazawa ,  Koji Goto

IPC分类号： H04J1402

CPC分类号： H04B10/27 ,  H04B10/278

摘要： In an optical transmission, system, a trunk cable having two pairs of optical fibers is provided between first and second trunk stations to use one of the two pairs of the optical fibers for communication between the first and second trunk stations and the other for communication with first and second branch stations. Two branching units of first and second, and third and forth, are respectively provided for the first and second branch stations, and connected to each of the associated first and second branch stations, by first and second or third and forth branching cables. The first branch station connects to the first branching unit via the first branching cable having two pairs of optical fibers, and connects to the second branching unit via the second branching cable having two pairs of optical fibers. One of the two pairs of the optical fibers of the first branching cable and one of the two pairs of the optical fibers of the second branching cable are normally used, and the others are reserved as spare fibers. Alternatively, the first branching cable is normally used, and the second branching cable is reserved as a spare cable.

摘要翻译： 在光传输系统中，在第一和第二中继站之间提供具有两对光纤对的中继电缆，以使用两对光纤中的一对用于第一和第二干线站之间的通信，另一对用于与 第一和第二分支站。 第一和第二和第三和第四分支单元分别设置用于第一和第二分支站，并通过第一和第二或第三和第四和第四分支电缆连接到相关联的第一和第二分支站中的每一个。 第一分支站通过具有两对光纤的第一分支电缆连接到第一分支单元，并经由具有两对光纤的第二分支电缆连接到第二分支单元。 通常使用第一分支电缆的两对光纤中的一对光纤和第二分支电缆的两对光纤中的一对，其他光纤被保留为备用光纤。 或者，通常使用第一分支电缆，并且将第二分支电缆预留为备用电缆。

公开(公告)号：US6115156A

公开(公告)日：2000-09-05

申请号：US964528

申请日：1997-11-05

申请人： Tomohiro Otani ,  Toshio Kawazawa ,  Koji Goto ,  Hiroharu Wakabayashi

发明人： Tomohiro Otani ,  Toshio Kawazawa ,  Koji Goto ,  Hiroharu Wakabayashi

IPC分类号： G02B6/28 ,  H04B10/2507 ,  H04B10/2519 ,  H04B10/27 ,  H04B10/29 ,  H04J14/00 ,  H04J14/02

CPC分类号： H04B10/2941 ,  H04B10/2519 ,  H04J14/02 ,  H04B2210/252 ,  H04B2210/258 ,  H04J14/0221

摘要： A demultiplexer device is used in a wavelength-division multiplexed optical fiber communication line to achieve efficient dispersion compensation and loss compensation as well as a reduction of active devices such as optical amplifiers. The demultiplexer device has a series of couplers disposed in multi-stages from the input of the demultiplexer. Each coupler has two branches with one branch of each coupler connected to a separate optical filter and the other branches are series connected to a subsequent stage of the couplers through equalizing fibers, except for the final stage which has its second branch connected to an optical filter for the shortest wavelength transmitted. The equalizing fibers are thus serially connected between couplers and act to perform a cumulative dispersion compensation. The quantity of the equalizing fibers can thus be reduced as a whole, and as a result the attenuation amount also decreases, so that the number of optical amplifiers can be reduced.

摘要翻译： 解复用器装置用于波分复用光纤通信线路中，以实现有效的色散补偿和损耗补偿以及减少诸如光放大器之类的有源器件。 多路分解器装置具有从多路分解器的输入端以多级布置的一系列耦合器。 每个耦合器具有两个分支，每个耦合器的一个分支连接到单独的滤光器，并且其它分支通过均衡纤维串联连接到耦合器的后续阶段，除了最后一级，其第二分支连接到滤光器 对于最短的波长传输。 均衡纤维因此串联连接在耦合器之间并用于执行累积色散补偿。 因此，均匀纤维的量可以整体上减少，结果衰减量也减小，从而可以减少光放大器的数量。

公开(公告)号：US06327060B1

公开(公告)日：2001-12-04

申请号：US09034932

申请日：1998-03-04

申请人： Tomohiro Otani ,  Toshio Kawazawa ,  Koji Goto

发明人： Tomohiro Otani ,  Toshio Kawazawa ,  Koji Goto

IPC分类号： H04B1000

CPC分类号： H04B10/27 ,  H04B10/035 ,  H04B10/071 ,  H04B10/0775 ,  H04B2210/078

摘要： In an optical transmission system, an optical transmission line has up and down systems and loops back a supervisory light between the up and down systems. Trunk stations are provided at both ends of the optical transmission line and one or more optically branching units are provided in the optical transmission line for add/dropping a specific wavelength respectively. A branch station is connected to each of one or more the branching units. A bypass line for bypassing the supervisory light is provided in each of the one or more optically branching units.

摘要翻译： 在光传输系统中，光传输线路具有上下系统并在上下系统之间循环回监控光。 在光传输线的两端设置有中继站，并且在光传输线路中设置一个或多个光分路单元，用于分别添加/删除特定波长。 分支站连接到一个或多个分支单元中的每一个。 在一个或多个光学分支单元中的每一个中提供用于旁路监视光的旁路线。

公开(公告)号：US5978122A

公开(公告)日：1999-11-02

申请号：US672071

申请日：1996-06-26

申请人： Toshio Kawazawa ,  Koji Goto ,  Tomohiro Otani ,  Haruo Abe ,  Masando Tanaka

发明人： Toshio Kawazawa ,  Koji Goto ,  Tomohiro Otani ,  Haruo Abe ,  Masando Tanaka

IPC分类号： H04J14/00 ,  H04B10/2507 ,  H04B10/294 ,  H04J14/02 ,  H04B10/16

CPC分类号： H04B10/25253

摘要： A method of suppressing noise and improving the optical transmission characteristic of a wavelength division multiplexing transmission system provides lights for suppressing noise from the light sources (NS1 and NS2) which are multiplexed on the wavelength division multiplexed signal. Consequently, the S/N ratio of each channel of a wavelength division multiplexed signal which propagates through the optical path can be improved.

摘要翻译： 抑制噪声并提高波分复用传输系统的光传输特性的方法提供了用于抑制来自在波分复用信号上复用的光源（NS1和NS2）的噪声的光。 因此，可以提高通过光路传播的波分复用信号的每个通道的信噪比。

公开(公告)号：US6157098A

公开(公告)日：2000-12-05

申请号：US217172

申请日：1998-12-21

申请人： Junichi Kojima ,  Kenichi Asakawa ,  Koji Goto ,  Toshio Kawazawa ,  Koh-ichi Tatekura ,  Etsuo Nazuka

发明人： Junichi Kojima ,  Kenichi Asakawa ,  Koji Goto ,  Toshio Kawazawa ,  Koh-ichi Tatekura ,  Etsuo Nazuka

IPC分类号： H04B10/03 ,  H04B10/07 ,  H04B10/29 ,  H04B10/80 ,  H01H47/22

CPC分类号： H04B10/808 ,  Y10T307/747 ,  Y10T307/937

摘要： A feed line connecting circuit for selectively connecting first, second and third feed line connecting terminals under a predetermined current feeding condition comprises a first current detector connected between one of the first and second feed line connecting terminals and a central node for detecting a current over a predetermined value; a first switch connected between the one of the first and second feed line connecting terminals and the central node for connecting said one of the first and second feed line connecting terminals to the central node under an unpowered condition; a selective switch controlled by the first current detector, the selective switch having first and second contacts and a common contact connected to the third feed line connecting terminal, the common contact being connected to the first selective contact when the first current detector does not detect a current over the predetermined value, and to the second selective contact when the first current detector detects a current over the predetermined value; and a second current detector connected between the first selective contact of the selective switch and the central node to change the first switch so as to disconnect said one of the first and second feed line connecting terminals from the central node when detecting a current above the predetermined value.

摘要翻译： 一种用于在预定的电流馈送条件下选择性地连接第一，第二和第三馈电线连接端子的馈线连接电路包括连接在第一和第二馈电线连接端子之一之间的第一电流检测器和用于检测电流 预定值 连接在所述第一和第二馈电线连接端子之一和所述中心节点之间的第一开关，用于在无电力状态下将所述第一和第二馈电线连接端子之一连接到所述中心节点; 由第一电流检测器控制的选择开关，所述选择开关具有第一和第二触点和连接到第三馈电线连接端子的公共触点，当第一电流检测器不检测到第一电流检测器时，公共触点连接到第一选择触点 当所述第一电流检测器检测到超过所述预定值的电流时，所述第二选择性接触; 以及第二电流检测器，连接在选择开关的第一选择触点和中心节点之间，以改变第一开关，以便当检测到高于预定值的电流时，将第一和第二馈电线连接端子与中心节点断开 值。

公开(公告)号：US07009693B2

公开(公告)日：2006-03-07

申请号：US10455869

申请日：2003-06-06

申请人： Kiyoaki Takashina ,  Toshio Kawazawa ,  Koji Goto

发明人： Kiyoaki Takashina ,  Toshio Kawazawa ,  Koji Goto

IPC分类号： G01N21/00

CPC分类号： H04B10/079 ,  H04B10/071

摘要： To control a gain profile in an optical fiber line to become a desirable form, a C-OTDR measuring apparatus (36) outputs a probe pulse light having a wavelength λm for an optical fiber line (14). A power level on the input or output side of a variable gain equalizer (22) can be measured according to a C-OTDR waveform of a return light of the probe pulse light entered through a C-OTDR path (20c) and an optical fiber line (16). By sweeping the measurement wavelength λm, the gain file is measured. The equalizing characteristics of the variable gain equalizer (22) are remotely controlled so that the gain profile becomes a desirable form according to the measured result.

摘要翻译： 为了控制光纤线路中的增益曲线成为期望的形式，C-OTDR测量装置（36）输出具有用于光纤线路（14）的波长长度的探针脉冲光。 可变增益均衡器（22）的输入或输出侧的功率电平可以根据通过C-OTDR路径（20c）和光学器件（20c）输入的探针脉冲光的返回光的C-OTDR波形来测量 纤维线（16）。 通过扫描测量波长lambdam，测量增益文件。 可变增益均衡器（22）的均衡特性被远程控制，使得增益分布根据测量结果变为期望的形式。

公开(公告)号：US07158728B2

公开(公告)日：2007-01-02

申请号：US10191319

申请日：2002-07-10

申请人： Yasunori Kasahara ,  Hideki Goto ,  Takashi Mizuochi ,  Kenkichi Shimomura ,  Yukio Horiuchi ,  Masatoshi Suzuki ,  Daishi Ishii ,  Toshio Kawazawa

发明人： Yasunori Kasahara ,  Hideki Goto ,  Takashi Mizuochi ,  Kenkichi Shimomura ,  Yukio Horiuchi ,  Masatoshi Suzuki ,  Daishi Ishii ,  Toshio Kawazawa

IPC分类号： H04B10/02

CPC分类号： H04B10/2918 ,  H04B10/0777 ,  H04B2210/074

摘要： An optical repeating system includes an optical transmitter and a plurality of optical amplifying repeaters. The optical transmitter specifies a part or all of the optical amplifying repeaters, and transmits a supervisory command to the specified optical amplifying repeaters as a first sub-signal via an uplink or downlink optical transmission line. The supervisory command is a command to supervise internal circuits of the optical amplifying repeaters. Receiving the supervisory command addressed thereto via the uplink or downlink optical transmission line, the optical amplifying repeaters each transmit a supervisory signal indicating a supervisory result corresponding to the supervisory command to optical receivers via the uplink and downlink optical transmission lines as a second sub-signal. The optical system can reduce the time take to acquire the supervisory information about the plurality of the optical amplifying repeaters.

摘要翻译： 光学重复系统包括光发射机和多个光放大中继器。 光发射机规定了一部分或全部光放大中继器，并经由上行或下行光传输线路将指示的光放大中继器的监控命令作为第一子信号发送。 监控命令是监控光放大中继器内部电路的命令。 通过上行链路或下行链路光传输线路接收到该监控命令，光放大中继器将经过上行和下行光传输线路的指示对应于监控命令的监控结果的监控信号发送给光接收机作为第二子信号 。 光学系统可以减少获取关于多个光学放大转发器的监控信息的时间。

公开(公告)号：US06654104B2

公开(公告)日：2003-11-25

申请号：US09975319

申请日：2001-10-12

申请人： Eiji Kimura ,  Motoki Imamura ,  Toshio Kawazawa

发明人： Eiji Kimura ,  Motoki Imamura ,  Toshio Kawazawa

IPC分类号： G01N2100

CPC分类号： G01M11/335 ,  G01M11/333 ,  G01M11/338

摘要： A technique for measuring optical characteristics includes providing a variable wavelength light source a fixed wavelength light source optical modulators for modulating the variable wavelength light and the fixed wavelength light, a fiber coupler for entering composite light generated by composing the variable wavelength light with the fixed wavelength light into a device under test, a circulator for extracting a variable wavelength light component from light transmitted through a fiber pair, and an optical filter for extracting a variable wavelength light component from the transmitted light, and measuring a phase difference of the variable wavelength light component with the fixed wavelength light component as a reference.

摘要翻译： 一种用于测量光学特性的技术包括：提供可变波长光源用于调制可变波长光和固定波长光的固定波长光源光调制器，用于输入通过组合具有固定波长的可变波长光产生的复合光的光纤耦合器 照射到被测器件中，用于从透过光纤对的光中提取可变波长光成分的循环器，以及用于从透射光中提取可变波长光成分的滤光器，并测量可变波长光的相位差 固定波长光分量作为参考。

公开(公告)号：US06594003B1

公开(公告)日：2003-07-15

申请号：US09553066

申请日：2000-04-20

申请人： Yukio Horiuchi ,  Toshio Kawazawa

发明人： Yukio Horiuchi ,  Toshio Kawazawa

IPC分类号： G01N2100

CPC分类号： G01M11/333 ,  G01M11/335 ,  G01M11/338

摘要： A measuring system of transmission characteristics comprises a reference signal light generator for generating reference signal light of a reference wavelength optically intensity-modulated at a reference frequency, a measuring signal light generator for generating measuring signal light of a measuring wavelength optically intensity-modulated at a measuring frequency synchronizing with the reference frequency, a multiplexer for multiplexing the reference signal light and measuring signal light respectively generated by the reference signal light generator and measuring signal light generator and outputting them onto a to-be-measured optical line, a photodetector for converting the lights propagated on the to-be-measured line into electric signals, a reference frequency extractor for extracting the component of the reference frequency from the output of the photodetector, and a phase detector for detecting a phase of a frequency component corresponding to the measuring frequency contained in the output of the photodetector according to the output of the reference frequency extractor.

摘要翻译： 传输特性的测量系统包括：参考信号光发生器，用于产生以参考频率光强度调制的参考波长的参考信号光;测量信号光发生器，用于产生测量信号光，所述测量信号光在 测量与参考频率同步的频率，多路复用器，用于多路复用参考信号光和测量信号光，测量信号光分别由参考信号光发生器和测量信号光发生器产生并输出到待测光路上，光检测器用于转换 在待测线路上传播的光线变为电信号，用于从光电检测器的输出中提取参考频率的分量的参考频率提取器，以及用于检测与测量相对应的频率分量的相位的相位检测器 频率包含 根据参考频率提取器的输出在光电检测器的输出端。

公开(公告)号：US07130544B2

公开(公告)日：2006-10-31

申请号：US10192705

申请日：2002-07-11

申请人： Yasunori Kasahara ,  Hideki Goto ,  Takashi Mizuochi ,  Kenkichi Shimomura ,  Masatoshi Suzuki ,  Yukio Horiuchi ,  Daishi Ishii ,  Toshio Kawazawa

发明人： Yasunori Kasahara ,  Hideki Goto ,  Takashi Mizuochi ,  Kenkichi Shimomura ,  Masatoshi Suzuki ,  Yukio Horiuchi ,  Daishi Ishii ,  Toshio Kawazawa

IPC分类号： H04B10/02

CPC分类号： H04B10/2918 ,  H04B10/0777 ,  H04B2210/074

摘要： An optical repeating system includes an optical transmitter and an optical amplifying repeater. The optical transmitter transmits a supervisory command and a control command to the optical amplifying repeater as a first sub-signal. The supervisory command is a command to supervise internal circuits of the optical amplifying repeater, and the control command is a command to control the optical amplifying repeater. The optical amplifying repeater includes multiple sub-modules each for amplifying and repeating main signals on multiple sets of optical transmission lines. When receiving the supervisory command via the optical transmission line, each sub-module transmits a supervisory signal indicating the supervisory result associated with the supervisory command to an optical receiver as a second sub-signal. In addition, when receiving a predetermined control command via the optical transmission line, each sub-module initializes another sub-module of the multiple sub-modules in response to the predetermined control command. The optical amplifying repeater can restart its control program even when it has fallen into a state where it is difficult to continue to execute the normal operation in accordance with the control program because of some exception or the like.