公开(公告)号：US06144474A

公开(公告)日：2000-11-07

申请号：US949690

申请日：1997-10-14

申请人： Mitsushi Nitta ,  Shinichirou Harasawa ,  Hiroshi Nakashima

发明人： Mitsushi Nitta ,  Shinichirou Harasawa ,  Hiroshi Nakashima

IPC分类号： H04B10/291 ,  H04B10/294 ,  H04B10/297 ,  H04J14/02 ,  H04B10/16

CPC分类号： H04J14/0221 ,  H04B10/2918 ,  H04B10/2941 ,  H04B10/2972 ,  H04J14/0206 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0219

摘要： An optical transmission system including a plurality of optical repeaters arranged along a transmission line. A respective gain equalizer is arranged along the transmission line after an integer number of optical repeaters. Further, each optical repeater can include an optical amplifier, a gain equalizer and a connection mechanism. The connection mechanism has a first state and a second state so that (a) when the connection mechanism is in the first state, the gain equalizer of the optical repeater performs an equalization process on the light signal, and (b) when the connection mechanism is in the second state, the gain equalizer of the optical repeater does not perform an equalization process on the light signal. An add/drop apparatus is also provided for adding/dropping an individual wavelength signal from a wavelength division multiplexed (WDM) signal travelling through the optical communication system. The add/drop apparatus includes a plurality of filters, and a selection mechanism. Each filter affects a different wavelength. The plurality of filters includes at least one filter affecting a wavelength corresponding to a wavelength signal in the WDM signal. The selection mechanism selects a respective filter of the at least one filter to allow the apparatus to add/drop the wavelength signal in the WDM signal corresponding to the wavelength of the selected filter.

摘要翻译： 一种光传输系统，包括沿着传输线布置的多个光中继器。 在整数个光中继器之后沿传输线布置相应的增益均衡器。 此外，每个光中继器可以包括光放大器，增益均衡器和连接机构。 连接机构具有第一状态和第二状态，使得（a）当连接机构处于第一状态时，光中继器的增益均衡器对光信号进行均衡处理，（b）当连接机构 处于第二状态时，光中继器的增益均衡器不对光信号执行均衡处理。 还提供了一种用于从通过光通信系统的波分复用（WDM）信号中添加/删除单个波长信号的分插装置。 该分插装置包括多个滤波器和选择机构。 每个滤镜影响不同的波长。 多个滤波器包括影响与WDM信号中的波长信号相对应的波长的至少一个滤波器。 所述选择机构选择所述至少一个滤波器的相应滤波器以允许所述装置对与所选滤波器的波长相对应的WDM信号中的波长信号进行加/减。

公开(公告)号：US6002820A

公开(公告)日：1999-12-14

申请号：US997808

申请日：1997-12-24

申请人： Mitsushi Nitta

发明人： Mitsushi Nitta

IPC分类号： G01M11/00 ,  G02B6/26 ,  G02B6/34 ,  H04B10/07 ,  H04B10/071 ,  H04B10/27 ,  H04B10/29 ,  H04J14/02 ,  G02B6/28

CPC分类号： G02B6/2746 ,  G01M11/3181 ,  G02B6/2932 ,  H04B10/071 ,  H04J14/0201 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0206 ,  H04J14/0213 ,  H04J14/0227 ,  H04J14/0279

摘要： An object of the present invention is to provide an optical branching and insertion apparatus with which the damage location can be searched for in all sections when a damage location is searched for in an optical transmission system in which an optical branching and insertion apparatus has been installed. The present invention provides an optical branching and insertion apparatus comprising a filter for reflecting light of a specific wavelength, a first optical circulator operatively connected to one side of the filter, outputting to the filter first light inputted from a first transmission path, outputting to a second transmission path the light of the specific wavelength reflected from the filter, and outputting to the first transmission path second light inputted from the second transmission path and a second optical circulator operatively connected to the other side of the filter, outputting to the filter third light inputted from a third transmission path, outputting to a fourth transmission path the light signal of the specific wavelength reflected from the filter, and outputting to the third transmission path fourth light inputted from the fourth transmission path.

摘要翻译： 本发明的目的是提供一种光分支和插入装置，当在已经安装光分路和插入装置的光传输系统中搜索损伤位置时，可以在所有部分中搜索损伤位置 。 本发明提供了一种光分路和插入装置，包括用于反射特定波长的光的滤光器，可操作地连接到滤光器一侧的第一光环行器，向滤光器输出从第一传输路径输入的第一光，输出到 第二传输路径是从滤波器反射的特定波长的光，并且将从第二传输路径输入的第二光输出到第一传输路径，以及可操作地连接到滤波器的另一侧的第二光环行器，向滤波器输出第三光 从第三传输路径输入，将从滤波器反射的特定波长的光信号输出到第四传输路径，并将从第四传输路径输入的第四光输出到第三传输路径。

公开(公告)号：US5296957A

公开(公告)日：1994-03-22

申请号：US759483

申请日：1991-09-13

申请人： Masaaki Takahashi ,  Takanori Maki ,  Kazuya Amaki ,  Katsumi Kikawa ,  Mitsushi Nitta

发明人： Masaaki Takahashi ,  Takanori Maki ,  Kazuya Amaki ,  Katsumi Kikawa ,  Mitsushi Nitta

IPC分类号： H04B10/00 ,  H04B10/02 ,  H04B10/035 ,  H04B10/077 ,  H04B10/08 ,  H04B10/17 ,  H04B10/291 ,  H04B10/293

CPC分类号： H04B10/2918 ,  H04B10/035 ,  H04B10/0777 ,  H04B10/2939 ,  H04B2210/074

摘要： An optical repeater having a loop-back function is provided in a transmission system including first and second transmission lines. The optical repeater includes a first optical amplifier connected to the first transmission line, a second optical amplifier connected to the second transmission line, a loop-back unit connected to both transmission lines, and a control unit. The control unit controls the loop-back unit to form a loop-back line when a loop-back instruction is detected. Therefore, optical signals are directly amplified without being converted into electrical signals, and a loop-back signal (return signal) and optical signals are not mixed in the optical repeater so that a loop-back operation can be correctly carried out in an optical repeater having a small size and low power consumption.

摘要翻译： 在包括第一和第二传输线的传输系统中提供具有环回功能的光中继器。 光中继器包括连接到第一传输线的第一光放大器，连接到第二传输线的第二光放大器，连接到两传输线的环回单元和控制单元。 当检测到环回指令时，控制单元控制环回单元形成回送线。 因此，光信号被直接放大而不被转换为电信号，并且环路信号（返回信号）和光信号不会混入光中继器中，从而可以在光中继器中正确执行环回操作 具有小尺寸和低功耗。