| 摘要 |
Provided are a method and an apparatus for optically extracting a clock signal, that can be realized at low costs while minimizing an influence by input patterns and noises. In the method, optical signals having predetermined wavelength components are extracted using two FBG filters in order to extract a clock component from an input optical signal. After that, an influence by input filters is minimized by passing the extracted optical signals having the predetermined wavelengths through a Fabry-Perot filter.
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