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  Synchronized Mid-Infrared Pulses at the Fritz Haber Institute IR-FEL

Kießling, R., Gewinner, S., Paarmann, A., Schöllkopf, W., & Wolf, M. (2018). Synchronized Mid-Infrared Pulses at the Fritz Haber Institute IR-FEL. In K. Bishofberger, B. Carlsten, & V. R. W. Schaa (Eds.), Proceedings of the 38th International Free-Electron Laser Conference (pp. 188-191). Geneva: JACoW. doi:10.18429/JACoW-FEL2017-MOP059.

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 Creators:
Kießling, Riko1, Author              
Gewinner, Sandy2, Author              
Paarmann, Alexander1, Author              
Schöllkopf, Wieland2, Author              
Wolf, Martin1, Author              
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1Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              
2Molecular Physics, Fritz Haber Institute, Max Planck Society, ou_634545              

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 Abstract: The combined application of FEL radiation and femtosecond table-top lasers for two-color spectroscopy demands an accurate pulse synchronization. In order to employ the Infared FEL at the Fritz Haber Institute for non-linear and time-resolved experiments, an RF-over-fiber-based timing system has been established. Using a balanced optical cross-correlation scheme, we determined an FEL micro-pulse timing jitter of 100-200 fs (rms). The long-term timing drift was found to be well correlated to the energy fluctuations of the accelerated electron bunches. By means of the jitter-corrected cross-correlation signal, we directly measure the FEL pulse shape at different cavity detunings. For large cavity detuning, narrowband IR radiation (~ 0.3 % FWHM) can be generated and utilized for high-resolution non-linear spectroscopy. On the other hand, sub-picosecond pulses are provided at small detuning, which are well-suited for time-resolved measurements. At intermediate detuning values, we observe the build-up and dynamics of multipulses that result in the well-known limit-cycle power oscillations.

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Language(s): eng - English
 Dates: 2018-02
 Publication Status: Published online
 Pages: 4
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.18429/JACoW-FEL2017-MOP059
 Degree: -

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Title: 38th International Free-Electron Laser Conference (FEL2017)
Place of Event: Santa Fe, NM, USA
Start-/End Date: 2017-08-20 - 2017-08-25

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Title: Proceedings of the 38th International Free-Electron Laser Conference
Source Genre: Proceedings
 Creator(s):
Bishofberger, Kip, Editor
Carlsten, Bruce, Editor
Schaa, Volker R. W., Editor
Affiliations:
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Publ. Info: Geneva : JACoW
Pages: X, 614 Volume / Issue: - Sequence Number: - Start / End Page: 188 - 191 Identifier: ISBN: 978-3-95450-179-3