发明名称 |
Method and apparatus for measuring optical signal-to-noise ratio, and pre-emphasis method, in an optical communication system |
摘要 |
<p>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. <IMAGE></p> |
申请公布号 |
EP1130803(A2) |
申请公布日期 |
2001.09.05 |
申请号 |
EP20000124366 |
申请日期 |
2000.11.20 |
申请人 |
FUJITSU LIMITED |
发明人 |
SAKAMOTO, TAKESHI;TOMOFUJI, HIROAKI;ONAKA, HIROSHI;SEKIYA, MOTOYOSHI;MURAKAMI, MAKOTO;YAMANE KAZUO;TERAHARA, TAKAFUMI |
分类号 |
H01S3/10;H01S3/06;H01S3/067;(IPC1-7):H04B10/08;H04B10/17 |
主分类号 |
H01S3/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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