发明名称 |
Apparatus and method for detecting channel information from WDM optical signal by using wavelength selective photo detector |
摘要 |
An apparatus and a method for detecting channel information from wavelength division multiplexed (WDM) optical signals by using a wavelength selective photo detector. This apparatus and method can monitor channel status in a simple, rapid and economical way. The apparatus includes: pre-processor for pre-processing WDM optical signals and outputting a portion of the WDM optical signals; a photo detector for converting the WDM optical signal from said pre-processor a first electrical signal having a constant value regardless of wavelengths of the WDM optical signal; a wavelength selective photo detector for converting the WDM optical signal from said pre-processor into a second electrical signal having a different value in response to the wavelength of the distributed optical signal; lookup table; normalization part for normalizing the second electrical signal with respect to the first electrical signal; channel number detector for detecting a number of channels using the electrical power for one channel and power of the first electrical signal; and channel location detector for detecting channel location by using normalized electrical signals and electrical power values stored in said lookup table.
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申请公布号 |
US6469814(B1) |
申请公布日期 |
2002.10.22 |
申请号 |
US19990429261 |
申请日期 |
1999.10.29 |
申请人 |
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE;KOREA TELECOM |
发明人 |
PARK CHANG SOO;SEO WAN SEOK;YUN BYUNG HO |
分类号 |
G02B6/02;H04B10/08;H04B10/158;H04J14/02;(IPC1-7):H04J14/02 |
主分类号 |
G02B6/02 |
代理机构 |
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主权项 |
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地址 |
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