发明名称 |
Method and apparatus for receiving frequency modulated signals on an intensity modulated optical carrier |
摘要 |
The present invention provides a method and an FSK/IM receiver to solve the problem of burst-mode detection of frequency modulated labels on an ASK (or IM) payload. In accordance with one embodiment of the present invention, two FSK tones of an input FSK/IM optical signal are separated and communicated to a balanced detector. At the balanced detector, the two FSK tones are subtracted from each other and result in an AC-coupled data stream. The AC-coupled data stream is communicated to a Schmitt-trigger where the hysteresis of the Schmitt-trigger finally eliminates any residual ASK (or IM) payload in the recovered output data. The present invention provides both single channel and WDM solutions.
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申请公布号 |
US7650081(B2) |
申请公布日期 |
2010.01.19 |
申请号 |
US20040853825 |
申请日期 |
2004.05.26 |
申请人 |
ALCATEL-LUCENT USA INC. |
发明人 |
JENNEN JEAN G.;VLACHOS KYRIAKOS |
分类号 |
H04B10/04;H04B10/06;H04B10/158 |
主分类号 |
H04B10/04 |
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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