Fig. 3: T-CUP for temporal focusing.
From: Single-shot real-time femtosecond imaging of temporal focusing
a Experimental setup. CL collimating lens, FL focusing lens, TFP temporal focusing plane, f1 and f2 focal lengths. For the side view, a small amount of water vapor was used to scatter photons into the T-CUP system. b Representative frames from the front view (see Supplementary Movie S1 for the full evolution), showing the laser pulse sweeping along the y axis of the temporal focusing plane. The black circles denote the z axis. c Representative frames from the side view (see Supplementary Movies S1 and S2 for the full evolution), showing a single ultrashort laser beam propagating through the temporal focusing plane. The temporal focusing plane is marked by the dashed line. d Light intensity projected along the z axis, averaged and normalized individually, for each frame in c. The red dots are the data measured from the images (to avoid cluttering, only one data point is shown for every five data points measured and used for fitting), and the blue curves show the Gaussian fittings to the measured data. Full widths at half maxima (FWHMs) are computed for each fitted curve. e Surface plot of the normalized intensity along the primary optical axis as a function of t and z near the temporal focusing plane. f Measured pulse widths (FWHMs) as a function of position on the z axis near the temporal focusing plane. The location of the temporal focusing plane is set to be zero
