Abstract

Pulse burst generation has important applications in material processing [1], seeding of free electron lasers [2] and coherent pulse stacking [3]. In particular, coherent pulse stacking technique allows further scaling of fiber and solid-state amplifiers by splitting the seed pulse into multiple replicas and stacking them into a single dominant pulse after the amplification. For this task, a pulse burst consisting of 4-90 pulses, with fully controllable amplitudes and phases is required. In this contribution we demonstrate pulse burst generation method based on the Vernier effect. The pulse burst with controllable amplitudes and phases is formed using a femtosecond oscillator and regenerative amplifier cavity that have slightly different round trip times. This operation mode can be used for the purposes of coherent pulse stacking, rapid material miroprocessing and rapid scan spectroscopy. Unlike in the case of pulse burst formation from a GHz repetition rate oscillator [4], the pulse burst formation using the Vernier effect allows very high repetition rate (much higher than the driving oscillator frequency) pulse burst formation with controllable amplitudes and phases.

© 2017 IEEE

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