A novel all-optical clock recovery scheme based on “Intensity reshaper” and mode-locked semiconductor fiber ring laser is demonstrated for equal-amplitude even-multiplexed OTDM signals, which simplifies signal generation and propagation in high-speed OTDM systems. In theory, a mathematical expression is given about the intensity of harmonic of clock-frequency component. The relative intensity of every frequency component will change by adjusting the PC in the “Intensity reshaper”, so the desirable clock-frequency component can be enhanced, which is helpful for clock recovery. In experiment, 2.5 GHz frame clock and 20 GHz bit clock are extracted from equal-amplitude even-multiplexed 8×2.5 GHz OTDM signal by using this scheme. The extracted clock pulses have several desirable features such as low timing jitter, broad wavelength tuning range and polarization independence. This technique can be applied to clock recovery in high-speed OTDM network.