We describe a mode-locked hybrid pulse source with a two-section laser diode to obtain short mode-locked pulses (23 ps) with an average power of 7.8 mW, a high peak power of 137 mW, and a repetition rate of 2.51 GHz. The hybrid laser incorporates a two-section laser and an optical fiber cavity with an integrated Bragg reflector. The Bragg reflector controls the operating wavelength to subnanometer precision and also confines the bandwidth of the pulses so as to keep the time–bandwidth product below 1.
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