发明名称 |
Maintenance of optical networks |
摘要 |
<p>An apparatus is provided for adding a dither signal to an optical carrier modulated with an information signal. The apparatus includes a dithering element having an input and an output in series with an optical carrier modulated with an information signal. A differential element having an inverting input, a non-inverting input, and an output is coupled to the input of the dithering element. A signal generator, which is provided for producing a desired dither signal to be added to the modulated optical carrier, is coupled to the non-inverting input of the differential element. A feedback element produces a signal related to the output of the dithering element and couples the signal related to the output of the dithering element to the inverting input of the differential element. <IMAGE></p> |
申请公布号 |
EP0782279(A2) |
申请公布日期 |
1997.07.02 |
申请号 |
EP19960309246 |
申请日期 |
1996.12.18 |
申请人 |
AT&T CORP. |
发明人 |
FATEHI, MOHAMMAD T.;HEISMANN, FRED LUDWIG |
分类号 |
H04B10/20;H04B10/02;H04B10/08;(IPC1-7):H04B10/08 |
主分类号 |
H04B10/20 |
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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