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All-optical clock recovery by a two-section DFB laser with different injection wavelengths is demonstrated exper-imentally at 38.5GHz.An optical clock with a root-mean-square timing jitter of 250fs and an extinction ratio of 12.1 dB is obtained with 1551 run injection.The timing jitter of the recovered clock is further investigated for various intensity ratios of the two DFB emission modes.