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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 14 — Jul. 14, 2014
  • pp: 16965–16975

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

Florian Kanal, Sabine Keiber, Reiner Eck, and Tobias Brixner  »View Author Affiliations

Optics Express, Vol. 22, Issue 14, pp. 16965-16975 (2014)

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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 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.

© 2014 Optical Society of America

OCIS Codes
(040.1490) Detectors : Cameras
(040.1520) Detectors : CCD, charge-coupled device
(230.4110) Optical devices : Modulators
(300.6500) Spectroscopy : Spectroscopy, time-resolved
(300.6530) Spectroscopy : Spectroscopy, ultrafast
(320.7100) Ultrafast optics : Ultrafast measurements

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: March 26, 2014
Revised Manuscript: May 9, 2014
Manuscript Accepted: May 19, 2014
Published: July 3, 2014

Virtual Issues
Vol. 9, Iss. 9 Virtual Journal for Biomedical Optics

Florian Kanal, Sabine Keiber, Reiner Eck, and Tobias Brixner, "100-kHz shot-to-shot broadband data acquisition for high-repetition-rate pump–probe spectroscopy," Opt. Express 22, 16965-16975 (2014)

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