We demonstrate a simple self-referenced single-shot method for simultaneously measuring two different arbitrary pulses, which can potentially be complex and also have very different wavelengths. The method is a variation of cross-correlation frequency-resolved optical gating (XFROG) that we call double-blind (DB) FROG. It involves measuring two spectrograms, both of which are obtained simultaneously in a single apparatus. DB FROG retrieves both pulses robustly by using the standard XFROG algorithm, implemented alternately on each of the traces, taking one pulse to be “known” and solving for the other. We show both numerically and experimentally that DB FROG using a polarization-gating beam geometry works reliably and appears to have no nontrivial ambiguities.
© 2012 Optical Society of America
Original Manuscript: November 22, 2011
Revised Manuscript: January 30, 2012
Manuscript Accepted: February 2, 2012
Published: May 9, 2012
Tsz Chun Wong, Justin Ratner, Vikrant Chauhan, Jacob Cohen, Peter M. Vaughan, Lina Xu, Antonio Consoli, and Rick Trebino, "Simultaneously measuring two ultrashort laser pulses on a single-shot using double-blind frequency-resolved optical gating," J. Opt. Soc. Am. B 29, 1237-1244 (2012)