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A silicon-photonic tunable laser emitting two tunable wavelengths simultaneously is demonstrated. The laser consists of a single semiconductor optical amplifier that provides shared gain and a silicon-photonic chip that provides wavelength selections. A total optical power of 29.3 mW is shown, with 300 mA of gain current at 40°C. Continuous tuning of frequency spacing from 69.5 GHz to 114.1 GHz is demonstrated. The two simultaneous laser channels show highly correlated phase noise, with a phase noise correlation coefficient of 90.7%.In i