High power hybrid pulse source

We describe a mode-locked hybrid pulse source which produces short (23 ps) mode locked pulses with an average power of 7.8 mW, high peak power of 137 mW, at a repetition rate of 2.51 GHz. The source uses a two section laser diode to allow high peak power, in an optical fiber cavity with an integrated Bragg reflector. The Bragg reflector controls the operating wavelength to sub nanometer precision, and also confines the bandwidth of the pulses to keep the time bandwidth product below one. >