Abstract

A new technique is successfully used to analyze in real time the pulse-to-pulse fluctuations of mode size and time duration in a picosecond Nd:YAG laser. In particular we show that the pulse length (30 psec) of our active–passive mode-locked Nd:YAG laser is stable to within 10% when the cavity is perfectly tuned and the saturable absorber is fresh. This technique is experimentally shown to be effective and reliable for real-time analysis of the stability of ultrashort laser pulses under a broad range of experimental conditions.

© 1989 Optical Society of America

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