Measuring extremely complex pulses with time-bandwidth products exceeding 65,000 using multiple-delay crossed-beam spectral interferometry

Abstract

We measure the complete electric field of extremely complex ultrafast waveforms using the simple linear-optical, interferometric pulse-measurement technique, MUD TADPOLE. The waveforms were measured with ~40 fs temporal resolution over a temporal range of ~3.5 ns and had time-bandwidth products exceeding 65,000. The approach is general and could allow the measurement of arbitrary optical waveforms.

Temporal focusing of ultrashort pulsed Bessel beams into Airy–Bessel light bullets

“….0.6 rad /ps, resulting that pulses up to 4 ps duration and with a time-bandwidth product of 1500 could be measured. A method similar to MUD TADPOLE [42], could be applied to enhance the technique for even longer temporal range. The spatial resolution-currently 3 μm-is determined by the mode size of the fibers.…”

Complete measurement of spatiotemporally complex multi-spatial-mode ultrashort pulses from multimode optical fibers using delay-scanned wavelength-multiplexed holography

“…Alternatively, if the pulse train is stable and the measurement can be made by averaging over one to two seconds, then scanning the delay and using a numerical time-concatenation technique can extend the measurable time-bandwidth product. This approach has been demonstrated in a previous version of spectral interferometry [21,22] and can be used here to extend STRIPED FISH to a longer temporal measurement range and higher spectral resolution in a simple and inexpensive way.…”