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We report subpicosecond pulse generation at 22 GHz from a two-section passively mode-locked laser at 1.55 µm, using a novel AlGaInAs quantum-well wafer. By carefully designing the metal pad and the isolation layer, we are able to hybridly mode-lock the laser by modulating the saturable absorber at the fundamental repetition rate and thus achieve a low timing jitter of ∼280 fs (1 Hz-100 MHz).doi:10.1109/lpt.2012.2208738 fatcat:dv44nxmeq5anhcojwebzxfivnm