发明专利
JP2004320797A Optical transmission apparatus, optical transmission system and optical terminal station
审中-公开
基本信息:
- 专利标题： Optical transmission apparatus, optical transmission system and optical terminal station
- 申请号：JP2004162393 申请日：2004-05-31
- 公开(公告)号：JP2004320797A 公开(公告)日：2004-11-11
- 发明人： ONAKA HIROSHI , MIYATA HIDEYUKI , OTSUKA KAZUE , KAI TAKETAKA , NAKAZAWA TADAO , CHIKAMA TERUMI
- 申请人： Fujitsu Ltd , 富士通株式会社
- 专利权人： Fujitsu Ltd,富士通株式会社
- 当前专利权人： Fujitsu Ltd,富士通株式会社
- 优先权： JP2004162393 2004-05-31
- 主分类号： H04J14/00
- IPC分类号： H04J14/00 ; H04B10/032 ; H04B10/035 ; H04B10/25 ; H04B10/2507 ; H04B10/2525 ; H04B10/2569 ; H04B10/275 ; H04B10/291 ; H04B10/524 ; H04B10/58 ; H04J14/02 ; H04B10/02 ; H04B10/12 ; H04B10/13 ; H04B10/135 ; H04B10/14 ; H04B10/18
摘要：
PROBLEM TO BE SOLVED: To provide a light wavelength-multiplexed network and apparatus therefor using an AOTF with high reliability and cost performance.
SOLUTION: When configuring an OADM device in an OADM system, an AOTF 10 is used. The AOTF changes a frequency of an RF signal to be applied, to select an arbitrary wavelength. An optical signal of a specific wavelength can be dropped out of wavelength-multiplexed optical signals from an input, or a wavelength-multiplexed signal inputted from an add port can be multiplexed with a through optical signal. In such a case, however, while taking into account that a coherent crosstalk becomes greater, it is realistic to use the AOTF only for dropping in a real apparatus configuration. Otherwise, in the other method, the drop optical signal is branched by a photo-coupler, and a wavelength is selected in a tributor station, so that the wavelength selected in the tributor station can be extracted from the through optical signal by the AOTF.
COPYRIGHT: (C)2005,JPO&NCIPI
SOLUTION: When configuring an OADM device in an OADM system, an AOTF 10 is used. The AOTF changes a frequency of an RF signal to be applied, to select an arbitrary wavelength. An optical signal of a specific wavelength can be dropped out of wavelength-multiplexed optical signals from an input, or a wavelength-multiplexed signal inputted from an add port can be multiplexed with a through optical signal. In such a case, however, while taking into account that a coherent crosstalk becomes greater, it is realistic to use the AOTF only for dropping in a real apparatus configuration. Otherwise, in the other method, the drop optical signal is branched by a photo-coupler, and a wavelength is selected in a tributor station, so that the wavelength selected in the tributor station can be extracted from the through optical signal by the AOTF.
COPYRIGHT: (C)2005,JPO&NCIPI