发明公开
EP1130803A3 Method and apparatus for measuring optical signal-to-noise ratio, and pre-emphasis method, in an optical communication system
审中-公开
用于测量的光传输系统的光信噪比，和方法，用于预失真的方法和装置
- 专利标题： Method and apparatus for measuring optical signal-to-noise ratio, and pre-emphasis method, in an optical communication system
- 专利标题（中）： 用于测量的光传输系统的光信噪比，和方法，用于预失真的方法和装置
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申请号： EP00124366.6申请日： 2000-11-20
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公开(公告)号： EP1130803A3公开(公告)日： 2004-04-14
- 发明人: Sakamoto, Takeshi , Tomofuji, Hiroaki , Onaka, Hiroshi , Sekiya, Motoyoshi , Murakami, Makoto, Fujitsu Hokkaido Dig. Tech. Ltd. , Yamane Kazuo, c/o Fujitsu Ltd. , Terahara, Takafumi, Fujitsu Ltd.1-1Kamikodanaka
- 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： JP2000009387 20000118
- 主分类号： H04B10/08
- IPC分类号： H04B10/08 ; H04B10/17
摘要：
In a method of measuring an optical signal-to-noise ratio according to the present invention, a partial optical signal-to-noise ratio is defined, the partial optical signal-to-noise ratio is calculated from a predetermined physical quantity, the sum of inverse numbers of the partial optical signal-to-noise ratios is calculated, and further an inverse number of the sum is calculated to acquire an optical signal-to-noise ratio. The present invention makes it possible to measure optical SNR without directly measuring ASE in the optical signal. The present invention provides a measuring apparatus, a measuring circuit, a pre-emphasis method, an optical communication system, and a controlling apparatus each utilizing this method.
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