发明名称 |
Method and apparatus for optical frequency demodulation of an optical signal using interferometry |
摘要 |
The present invention provides an improved optical frequency demodulation technique for extracting overhead information from an optical channel signal carrying both high bit rate payload and low rate overhead data. The invention makes use of asymmetrical Mach-Zehnder interferometry (AMZI) in an optical frequency demodulator to efficiently extract the overhead information from the optical channel signal by frequency discrimination without necessitating a complete demodulation of the optical channel signal. By comparison to existing demodulation schemes, the invention provides an all-optical low cost, high gain technique for recovering the overhead data which improves the payload signal-to-noise ratio and enhance performance. <IMAGE> |
申请公布号 |
EP0967743(A3) |
申请公布日期 |
2002.01.09 |
申请号 |
EP19990304932 |
申请日期 |
1999.06.23 |
申请人 |
NORTEL NETWORKS LIMITED |
发明人 |
KIM, KINHONG;RICHARDSON, BRUCE |
分类号 |
H04B10/67;H04B10/69;(IPC1-7):H04B10/158 |
主分类号 |
H04B10/67 |
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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