US Patent 7580640 Method and apparatus for extracting optical clock signal
Patent 7580640 was granted and assigned to Electronics and Telecommunications Research Institute on August, 2009 by the United States Patent and Trademark Office.
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An apparatus and method for extracting an optical clock signal are provided. The method includes splitting a predetermined polarization component from an input optical signal, selecting frequency components for clock signal extraction from the predetermined polarization component and amplifying the selected frequency components, rotating the amplified frequency components by a predetermined angle and then reflecting them, amplifying the reflected frequency components and removing noise from the amplified frequency components using a Fabry-Perot filter, and obtaining a beat frequency component from the frequency components from which noise has been removed using the Fabry-Perot filter to extract a clock signal. Accordingly, influence of the pattern of the input optical signal is reduced and the apparatus and method are provided at low price.
US Patent 07580640 Method and apparatus for extracting optical clock signal US Patent 7580640 Method and apparatus for extracting optical clock signal
US Patent 07580640 Method and apparatus for extracting optical clock signal
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