We solve the problem of single-shot complete temporal measurement of continuum using cross-correlation frequency-resolved optical gating, achieving the necessary large spectral range using a polarization-gating geometry and the necessary large temporal range by significantly tilting the reference pulse. In addition, we simultaneously cancel the previously unavoidable longitudinal geometrical temporal smearing by using a carefully chosen combination of pulse tilt and beam-crossing angle, thus simultaneously achieving the required temporal resolution. The result is that we are able to make a complete measurement of an individual complex continuum pulse generated in photonic-crystal fiber. By enabling measurement of single optical rogue waves, this technique could provide insight and perhaps even lead to the prediction of when mathematically similar, destructive, oceanic rogue waves may occur.
We demonstrate the use of Double-Blind Frequency-Resolved Optical Gating implemented in Polarization-Gate geometry to measure two pulses at very different center wavelength (400nm and 800nm) simultaneously on a single-shot. Complex pulse pair with Time-Bandwidth-Product of 1.1 and 6.2 are measured and retrieved.
We demonstrate a simple device for measuring two independent ultrashort pulses, each of which can potentially be
complex and can also have very different center wavelength, simultaneously in a single-shot. We call our device
"double-blind" FROG and it is implemented using a polarization-gate geometry. In polarization-gate "double-blind"
FROG, each pulse acts as a reference pulse for the measurement of the other and yields the intensity and phase of both