Utilizing two-light-sources-injection optoelectronic oscillator, including generator and phase modulator, nonreturn-to-zero (NRZ), return-to-zero (RZ) signal and optical, electrical clock signal are generated simultaneously. In this configuration, a coupled dual-loop is formed in optical domain for suppressing the side modes in each loop without adding any active device. The phase modulator is employed to perform feedback modulation and data format conversion between NRZ and RZ with tunable duty ratio. Two lights work together for eliminating the unexpected frequency components introduced by optical coding signal. The experimental results at 10 Gb/s rate are demonstrated. The timing jitter of optical signal outputs is 637 fs and the duty ratio of converted RZ data is 33%. The electrical clock signal has high-quality spectrum at 10 GHz with a side mode suppression ratio of 58 dB, and a phase noise of -109 dBc/Hz at 10 kHz away from carrier.