High repetition-rate femtosecond stimulated Raman spectroscopy with fast acquisition
Name
oe-26-14-18331.pdf
Description
Published version
Size
2.89 MB
Format
Adobe PDF
Checksum (MD5)
446309bf9b9cb4cfc1c99fb450ab0859
Author(s)
Ashner, Matthew N.(Matthew Nickol)
Tisdale, William
Date Issued
July 2018
Journal
Optics Express
Publisher
The Optical Society
Citation
Ashner, Matthew N. and William A. Tisdale, "High repetition-rate femtosecond stimulated Raman spectroscopy with fast acquisition." Optics Express 26,14 (July 2018): p. 18331-18340 doi. 10.1364/OE.26.018331 ©2018 Authors
Version
Final published version
Abstract
Time-resolved femtosecond stimulated Raman spectroscopy (FSRS) is a powerful tool for investigating ultrafast structural and vibrational dynamics in light absorbing systems. However, the technique generally requires exposing a sample to high laser pulse fluences and long acquisition times to achieve adequate signal-to-noise ratios. Here, we describe a time-resolved FSRS instrument built around a Yb ultrafast amplifier operating at 200 kHz, and address some of the unique challenges that arise at high repetition-rates. The setup includes detection with a 9 kHz CMOS camera and an improved dual-chopping scheme to reject scattering artifacts that occur in the 3-pulse configuration. The instrument demonstrates good signal-to-noise performance while simultaneously achieving a 3-6 fold reduction in pulse energy and a 5-10 fold reduction in acquisition time relative to comparable 1 kHz instruments. ©2018 Optical Society of America.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1364/OE.26.018331
