Experimental studies on 10 Gb/s 3R degraded data regeneration were reported. A method of preprocessing the data signals using comb-like filter was proposed in order to overcome the pattern effect in the clock recovery using injection mode-locked ring laser based on semiconductor optical amplifier (SOA). The amplitude fluctuation and timing jitter caused by the pattern effect in clock pulses were greatly reduced. Furthermore, it was also demonstrated that clock could be recovered from the badly degraded signals. The recovered optical clock from degraded signals is shown to be free of pattern. The core of optical reshaping is a decision gate featuring signal extinction ratio enhancement and noise reduction. The reshaping based on an electroabsorption modulator was also studied. With this technology all-optical 3R regeneration was achieved from 10Gb/s degraded data.