Journal
OPTICS LETTERS
Volume 44, Issue 20, Pages 4921-4924Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.44.004921
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- Ministerio de Economia, Industria y Competitividad, Gobierno de Espana [FIS2017-87360-P]
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We demonstrate the measurement and retrieval of sub-7-fs laser pulses from a broadband Ti:Sa oscillator using ensembles of commercially available second-harmonic nanoparticles (NPs) and dispersion scan (d-scan). Scattering adds an incoherent component to the d-scan trace, and our retrieval procedure allows for correctly weighting the coherent and incoherent contributions to the trace. Comparison with a thin crystal [beta barium borate (BBO)] gave consistent pulse durations (6.56 +/- 0.03 fs for BBO and 6.5 +/- 0.1 Cs for the NPs). These results pave the way to using ensembles of NPs for the measurement of ultrashort light pulses with ultra-broadband spectra at room temperature with standard spectrometers, in any spectral range. (C) 2019 Optical Society of America
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