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100-kHz shot-to-shot broadband data acquisition for high-repetition-rate pump–probe spectroscopy

Please always quote using this URN: urn:nbn:de:bvb:20-opus-112853
  • Shot-to-shot broadband detection is common in ultrafast pump–probe spectroscopy. Taking advantage of the intensity correlation of subsequent laser pulses improves the signal-to-noise ratio. Finite data readout times of CCD chips in the employed spectrometer and the maximum available speed of mechanical pump-beam choppers typically limit this approach to lasers with repetition rates of a few kHz. For high-repetition (≥ 100 kHz) systems, one typically averages over a larger number of laser shots leading to inferior signal-to-noise ratios orShot-to-shot broadband detection is common in ultrafast pump–probe spectroscopy. Taking advantage of the intensity correlation of subsequent laser pulses improves the signal-to-noise ratio. Finite data readout times of CCD chips in the employed spectrometer and the maximum available speed of mechanical pump-beam choppers typically limit this approach to lasers with repetition rates of a few kHz. For high-repetition (≥ 100 kHz) systems, one typically averages over a larger number of laser shots leading to inferior signal-to-noise ratios or longer measurement times. Here we demonstrate broadband shot-to-shot detection in transient absorption spectroscopy with a 100-kHz femtosecond laser system. This is made possible using a home-built high-speed chopper with external laser synchronization and a fast CCD line camera. Shot-to-shot detection can reduce the data acquisition time by two orders of magnitude compared to few-kHz lasers while keeping the same signal-to-noise ratio.show moreshow less

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Metadaten
Author: Florian Kanal, Sabine Keiber, Reiner Eck, Tobias Brixner
URN:urn:nbn:de:bvb:20-opus-112853
Document Type:Journal article
Faculties:Fakultät für Chemie und Pharmazie / Institut für Physikalische und Theoretische Chemie
Language:English
Year of Completion:2014
Source:Optics Express Vol. 22, Issue 14, pp. 16965-16975 (2014). doi: 10.1364/OE.22.016965
DOI:https://doi.org/10.1364/OE.22.016965
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 54 Chemie / 541 Physikalische Chemie
Tag:CCD; cameras; charge-coupled device; modulators; time-resolved spectroscopy; ultrafast measurements; ultrafast spectroscopy
Release Date:2015/05/15
Collections:Open-Access-Publikationsfonds / Förderzeitraum 2014
Licence (German):License LogoDeutsches Urheberrecht