期刊
OPTICS LETTERS
卷 40, 期 6, 页码 1014-1017出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.40.001014
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资金
- Army Research Office [W911NF-13-1-0290]
- Air Force Office of Scientific Research [FA9550-14-1-0005]
- Packard Foundation [2013-39272]
Broadband supercontinuum (SC) pulses in the few cycle regime are a promising source for spectroscopic and imaging applications. However, SC sources are plagued by poor stability, greatly limiting their utility in phase-resolved non-linear experiments such as 2D photon echo spectroscopy (2D PES). Here, we generated SC by two-stage filamentation in argon and air starting from 100 fs input pulses, which are sufficiently high-power and stable to record timeresolved 2D PE spectra in a single laser shot. We obtain a total power of 400 mu J/pulse in the visible spectral range of 500-850 nm and, after compression, yield pulses with duration of 6 fs according to transient-grating frequency-resolved optical gating (TG-FROG) measurements. We demonstrate the method on the laser dye, Cresyl Violet, and observe coherent oscillations indicative of nuclear wavepacket dynamics. (C) 2015 Optical Society of America
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