US Patent 7577370 Method and apparatus for extracting optical clock signal
Patent 7577370 was granted and assigned to Electronics and Telecommunications Research Institute on August, 2009 by the United States Patent and Trademark Office.
All edits
An apparatus and method for extracting an optical clock signal are provided. The apparatus includes a first reflection filter selecting and reflecting only a first frequency component in an input optical signal; a first Fabry-Perot laser diode matching the first frequency component reflected by the first reflection filter with a predetermined output mode and outputting the first frequency component in the predetermined output mode; a second Fabry-Perot laser diode selecting a second frequency component in an input optical signal that has not been reflected but has been transmitted by the first reflection filter, matching the second frequency component with a predetermined output mode, and outputting the second frequency component in the predetermined output mode; and a photodetector receiving the first frequency component from the first Fabry-Perot laser diode and the second frequency component from the second Fabry-Perot laser diode and beating them to extract a clock signal. Accordingly, the optical clock signal can be extracted with low influence of the pattern of the input optical signal and an improved signal-to-noise ratio (SNR).
US Patent 07577370 Method and apparatus for extracting optical clock signal US Patent 7577370 Method and apparatus for extracting optical clock signal
US Patent 07577370 Method and apparatus for extracting optical clock signal
Find more entities like US Patent 7577370 Method and apparatus for extracting optical clock signal
