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
Original Manuscript: June 14, 1988
Manuscript Accepted: February 17, 1989
Published: May 15, 1989
Vincenzo Berardi, Antonello Cutolo, Luigi Zeni, Riccardo Bruzzese, Salvatore Solimeno, and Nicola Spinelli, "Mode size and time duration fluctuations in a picosecond Nd:YAG laser," Opt. Lett. 14, 494-496 (1989)