We construct field shapes with distinct amplitude profiles that have nearly identical second-harmonic generation frequency-resolved optical gating (SHG FROG) traces. Although such fields are not true mathematical ambiguities, they result in experimentally indistinguishable FROG traces. These fields are neither time-reversed copies nor pulselets with a mere relative phase difference, which are well known nontrivial ambiguities for SHG FROG. We also show that for certain example fields, second-order interferometric autocorrelation is more sensitive to the pulse shape than is SHG FROG.
© 2007 Optical Society of America
Original Manuscript: July 11, 2007
Manuscript Accepted: October 1, 2007
Published: December 14, 2007
Balakishore Yellampalle, KiYong Kim, and Antoniette J. Taylor, "Amplitude ambiguities in second-harmonic generation frequency-resolved optical gating," Opt. Lett. 32, 3558-3560 (2007)