We propose and demonstrate a novel implementation of spectral-shearing interferometry (SSI) for reconstructing the electric field of ultrashort pulses by utilizing asymmetric group velocity matching in a long nonlinear crystal. The proposed configuration eliminates the requirement for a linearly chirped auxiliary pulse that is in common in all existing SSI methods, relying on nonlinear conversion to produce a spectral shear.
© 2006 Optical Society of America
Original Manuscript: November 7, 2005
Manuscript Accepted: November 29, 2005
Aleksander S. Radunsky, Ellen M. Kosik Williams, Ian A. Walmsley, Piotr Wasylczyk, Wojciech Wasilewski, Alfred B. U'Ren, and Matthew E. Anderson, "Simplified spectral phase interferometry for direct electric-field reconstruction by using a thick nonlinear crystal," Opt. Lett. 31, 1008-1010 (2006)