A cross-correlation frequency-resolved optical gating (FROG) concept, potentially suitable for characterizing few or sub-cycle pulses in a single shot, is described in which a counter-propagating transient grating is used as both the gate and the dispersive element in a FROG spectrometer. An all-reflective setup, which can operate over the whole transmission range of the nonlinear medium, within the sensitivity range of the matrix sensor, is also proposed, and proof-of-principle experiments for the ultraviolet and visible-to-near-infrared spectral ranges are reported.
Valtna-Lukner, H., Belli, F., Ermolov, A., Köttig, F., Mak, K. F., Tani, F., Travers, J. C., & Russell, P. S. J. (2017). Extremely broadband single-shot cross-correlation frequency-resolved optical gating using a transient grating as gate and dispersive element. Review of Scientific Instruments, 88(7), . https://doi.org/10.1063/1.4991853