We characterize ultrashort mid-infrared pulses through upconversion by using the stretched pulses obtained from the uncompressed output of a chirped-pulse amplifier. The power spectrum thus translated into the visible region can be readily measured with a standard silicon CCD camera-based spectrometer. The spectral phase is also characterized by a variant of zero-added-phase spectral phase interferometry for direct electric field reconstruction. This is a general method that provides a multiplex advantage over conventional infrared detector array-based methods.
© 2005 Optical Society of America
(320.7100) Ultrafast optics : Ultrafast measurements
Kevin J. Kubarych, Manuel Joffre, Amy Moore, Nadia Belabas, and David M. Jonas, "Mid-infrared electric field characterization using a visible charge-coupled-device-based spectrometer," Opt. Lett. 30, 1228-1230 (2005)