A method for improved performance of feed-forward carrier-envelope phase stabilization in amplified laser sources is presented and experimentally demonstrated. The phase stabilization scheme is applicable for a broad range of repetition rates spanning from subhertz to 100 kHz. The method relies on driving an acousto-optic frequency shifter by few-cycle transients. The phase of these transients suitably controls the grating phase of the generated index grating inside the shifter material. This approach removes beam pointing as well as amplitude noise issues observed in continuously driven feed-forward schemes. The synthesis of these gratings can be understood as the acoustic equivalent of mode-locking or acoustic frequency combs.
© 2014 Optical Society of America
Lasers and Laser Optics
Original Manuscript: November 20, 2013
Revised Manuscript: December 13, 2013
Manuscript Accepted: December 19, 2013
Published: January 23, 2014
Bastian Borchers, Fabian Lücking, and Günter Steinmeyer, "Acoustic frequency combs for carrier-envelope phase stabilization," Opt. Lett. 39, 544-547 (2014)