Carrier-envelope phase stabilized 5.6 fs, 1.2 mJ pulses

The authors report the generation of 1.2 mJ pulses with a duration of 5.6 fs from a neon filled hollow-core fiber seeded with carrier-envelope phase stabilized 2.2 mJ, 25 fs pulses. The carrier-envelope phase after the fiber was measured by a second, out-loop f-to-2f interferometer. With seed pulse power locked, the carrier-envelope phase of the two-cycle pulses is controlled to a standard deviation of 370 mrad. The peak power of the carrier-envelope phase stabilized pulses, 0.2 TW, is twice that previously generated. The significance of seed pulse energy stability for carrier-envelope phase stabilization of few-cycle laser pulses is demonstrated. (c) 2007 American Institute of Physics.