11.2 GHz picosecond optical pulse generation in gain-switched short-cavity InGaAsP injection lasers by high-frequency direct modulation

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Abstract
We report the generation of high-speed optical pulses in gain-switched short-cavity InGaAsP injection lasers by high-frequency direct modulation. Short pulses (25 ps) with high on/off ratio were obtained at 11.2 GHz from a short-cavity double-channel planar buried-heterostructure (DCPBH) InGaAsP semiconductor laser biased at three times the threshold current. This is the first report of direct modulation above 10 GHz for InGaAsP lasers.