Mid-infrared ultrashort pulses of 9.2-mu;m center wavelength are characterized in both amplitude and phase. This is achieved by use of a variant of spectral phase interferometry for direct electric field reconstruction in which spectral interferometry has been replaced with time-domain interferometry, a technique that is well suited for infrared pulses. The setup permits simultaneous recording of the second-order interferometric autocorrelation, thus providing an independent check on the retrieved spectral phase.
© 2003 Optical Society of America
Cathie Ventalon, James M. Fraser, and Manuel Joffre, "Time-domain interferometry for direct electric field reconstruction of mid-infrared femtosecond pulses," Opt. Lett. 28, 1826-1828 (2003)