We report on the mode-locking behavior of a 1.06-μm Nd:YAG ring oscillator synchronously pumped by a 76-MHz, 20-psec dye laser at 0.59 μm with an average power of 600 mW. Gain modulation is based on relaxation from the pump band to the upper laser level with a time constant (minimum gain modulation time) of 470 psec; stable mode-locked operation is achieved with a gain modulation of only 10−4. Preliminary results give a minimum pulse width of 140 psec and suggest a novel way of mode locking rare-earth waveguide lasers.
© 1990 Optical Society of America
Original Manuscript: July 10, 1989
Manuscript Accepted: December 8, 1989
Published: February 15, 1990
C. J. Flood, G. Giuliani, and H. M. van Driel, "Observation of mode locking in a synchronously pumped Nd:YAG laser," Opt. Lett. 15, 218-220 (1990)