A simple all-optical clock extraction technique is proposed for multi-wavelength signals in single optical circuit based on a F-P filter and a single SOA.The F-P filter extracts different clocks of multi-wavelength signals.The SOA,connected after the F-P filter,reduces the low-frequency amplitude noise of the extracted clocks.Through the experiments,we demonstrate the possibility of recovering the clocks of two channels 10 Gbps signals with different wavelength and the ability of signal SOA to deal with two...