Abstract

We propose a novel technique based on negative impulse modulation for pulse repetition rate multiplication by rational harmonic mode locking with pulse-amplitude-equalized pulses directly from the laser cavity. We have generated a pulse train of 15GHz with more than 16dB suppression of unwanted amplitude modulation spurs by using a 1GHz RF signal. This is the highest suppression ratio for a repetition rate multiplication factor of 15 to our knowledge.

© 2006 Optical Society of America

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