Accurate measurement of carrier-envelope phase drift for infrared femtosecond laser pulses

A novel scheme to eliminate the artificial background phase jitter is proposed for measuring the carrier-envelope phase drift of tunable infrared femtosecond pulses from an OPA laser. Different from previous methods, a reference spectral interference measurement is performed, which reveals the artificial phase jitter in the measurement process, in addition to the normal f-to-2f interference measurement between the incident laser pulses and it second harmonic. By analyzing the interference fringes, the accurate CEP fluctuation of the incident pulses is obtained. (c) 2008 Optical Society of America

National Basic Research Program of China [2006CB806000]; National Natural Science Foundation [10734080, 10523003]; Knowledge Innovation Program of Chinese Academy of Sciences [KGCX-YW417]; Shanghai Commission of Science and Technology [06DZ22015, 07JC14055]