专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明公开

EP1727303A3 Optical transmitting apparatus, optical receiving apparatus, and optical communication system comprising them 有权
标题翻译：光发送装置，接收装置以及含有这些光通信系统
公开(公告)号：EP1727303A3
公开(公告)日：2007-03-07
申请号：EP05028634.3
申请日：2005-12-29
申请人： FUJITSU LIMITED
发明人： Akiyama, Yuichi Fujitsu Limited , Hoshida, Takeshi Fujitsu Limited , Miura, Akira Fujitsu Limited , Kai, Yutaka Fujitsu Limited , Ooi, Hiroki Fujitsu Limited , Rasmussen, Jens C. Fujitsu Limited , Nakamura, Kentaro Fujitsu Limited , Kuwata, Naoki Fujitsu Limited , Nishizawa, Yoshinori Fujitsu Limited , Takahara, Tomoo Fujitsu Limited , Yuki, Masahiro Fujitsu Limited
IPC分类号： H04B10/155 , H04B10/158
CPC分类号： G02F1/2255 , G02F1/0123 , H04B10/505 , H04B10/5051 , H04B10/5053 , H04B10/50575 , H04B10/50577 , H04B10/50595 , H04B10/5162 , H04B10/5165 , H04B10/5561 , H04B10/66 , H04B10/677
摘要： A phase shift unit (12) provides a prescribed phase difference (π/2, for example) between a pair of optical signals transmitted via a pair of arms constituting a data modulation unit (20) . A low-frequency signal f 0 is superimposed on one of the optical signals. A signal of which phase is shifted by π/2 from the low-frequency signal f 0 is superimposed on the other optical signal. A pair of the optical signals is coupled, and a part of which is converted into an electrical signal by a photodiode (3) . 2f 0 component contained in the electrical signal is extracted. Bias voltage provided to the phase shift unit (12) is controlled by feedback control so that the 2f 0 component becomes the minimum.

2. 发明公开

EP1508987A2 Wavelength division multiplexing transmission system 审中-公开
标题翻译： OptischesWellenlängenmultiplex-Übertragungssystem
公开(公告)号：EP1508987A2
公开(公告)日：2005-02-23
申请号：EP04016218.2
申请日：2004-07-09
申请人： FUJITSU LIMITED
发明人： Nakamura, Kentaro Fujitsu Limited , Ooi, Hiroki Fujitsu Limited , Ishikawa, George Fujitsu Limited
IPC分类号： H04J14/02
CPC分类号： H04J14/0227 , H04J14/02 , H04J14/0221
摘要： The present invention provides a wavelength division multiplexing transmission system for separating wavelength division multiplexing signals, where signal lights with different bit rates are wavelength division multiplexed, according to the bit rate, and processing the separated signals individually. The wavelength division multiplexed signals, where a low-speed bit rate signal is disposed in an odd channel group and a high-speed bit rate signal is disposed in an even channel group, are demultiplexed into a low-speed signal group and a high-speed signal group by an unequal bandwidth interleaver. The low-speed signal group is processed (e.g. demultiplexing, dispersion compensation) by an optical device appropriate for the low-speed signals, and the high-speed signal group is processed by an optical device appropriate for the high-speed signals. By this, a relatively expensive and high function optical device can be applied only for the high-speed signal side, so an increase in the device cost can be kept down. Also a device with specifications appropriate for each signal can be used.
摘要翻译：本发明提供了一种用于分离波分复用信号的波分复用传输系统，其中根据比特率对具有不同比特率的信号光进行波分复用，并分别处理分离的信号。在奇数信道组中设置低速比特率信号和高速比特率信号的波分复用信号被布置在偶数信道组中，被解复用为低速信号组，速度信号组由不等宽带交织器。通过适合于低速信号的光学装置对低速信号组进行处理（例如解复用，色散补偿），高速信号组由适合于高速信号的光学装置进行处理。因此，相对昂贵且功能高的光学器件只能用于高速信号侧，因此可以降低器件成本的增加。也可以使用具有适合每个信号的规格的装置。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式