发明公开
EP2110972A1 Optical transmitting apparatus, optical receiving apparatus, and optical communication system comprising them
失效 - 权利终止
基本信息:
- 专利标题： Optical transmitting apparatus, optical receiving apparatus, and optical communication system comprising them
- 专利标题（中）：的光传输装置
- 申请号：EP08158852.7 申请日：2005-12-29
- 公开(公告)号：EP2110972A1 公开(公告)日：2009-10-21
- 发明人： Akiyama, Yuichi , Hoshida, Takeshi , Miura, Akira , Kai, Yutaka , Ooi, Hiroki , Rasmussen, Jens C. , Nakamura, Kentaro , Kuwata, Naoki , Nishizawa, Yoshinori , Takahara, Tomoo , Yuki, Masahiro
- 申请人： Fujitsu Limited
- 申请人地址： 1-1, Kamikodanaka 4-chome Nakahara-ku Kawasaki-shi, Kanagawa 211-8588 JP
- 专利权人： Fujitsu Limited
- 当前专利权人： Fujitsu Limited
- 当前专利权人地址： 1-1, Kamikodanaka 4-chome Nakahara-ku Kawasaki-shi, Kanagawa 211-8588 JP
- 代理机构： HOFFMANN EITLE
- 优先权： JP2005150219 20050523; JP2005192971 20050630; JP2005293039 20051005
- 主分类号： H04B10/155
- IPC分类号： H04B10/155
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.
公开/授权文献:
- EP2110972B1 Optical transmitting apparatus 公开/授权日：2013-11-20
IPC结构图谱:
| H | 电学 |
| --H04 | 电通信技术 |
| ----H04B | 传输 |
| ------H04B10/00 | 利用微粒辐射束、或无线电波以外的电磁波，例如光、红外线的传输系统 |
| --------H04B10/02 | .零部件 |
| ----------H04B10/14 | ..终端站 |
| ------------H04B10/142 | ...相干零差或外差的系统 |
| --------------H04B10/155 | ....发送器 |