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Raman linewidth measurements using time-resolved hybrid picosecond/nanosecond rotational CARS

Nordström, Emil LU ; Hosseinnia, Ali LU ; Brackmann, Christian LU ; Bood, Joakim LU and Bengtsson, Per-Erik LU (2015) In Optics Letters 40(24). p.5718-5721
Abstract
We report an innovative approach for time-domain measurements of S-branch Raman linewidths using hybrid picosecond/nanosecond pure-rotational coherent anti-Stokes Raman spectroscopy (RCARS). The Raman coherences are created by two picosecond excitation pulses and are probed using a narrow-band nanosecond pulse at 532 nm. The generated RCARS signal contains the entire coherence decay in a single pulse. By extracting the decay times of the individual transitions, the J-dependent Raman linewidths can be calculated. Self-broadened S-branch linewidths for nitrogen and oxygen at 293 K and ambient pressure are in good agreement with previous time-domain measurements. Experimental considerations of the approach are discussed along with its merits... (More)
We report an innovative approach for time-domain measurements of S-branch Raman linewidths using hybrid picosecond/nanosecond pure-rotational coherent anti-Stokes Raman spectroscopy (RCARS). The Raman coherences are created by two picosecond excitation pulses and are probed using a narrow-band nanosecond pulse at 532 nm. The generated RCARS signal contains the entire coherence decay in a single pulse. By extracting the decay times of the individual transitions, the J-dependent Raman linewidths can be calculated. Self-broadened S-branch linewidths for nitrogen and oxygen at 293 K and ambient pressure are in good agreement with previous time-domain measurements. Experimental considerations of the approach are discussed along with its merits and limitations. The approach can be extended to a wide range of pressures and temperatures and has potential for simultaneous single-shot thermometry and linewidth determination. (C) 2015 Optical Society of America (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Optics Letters
volume
40
issue
24
pages
5718 - 5721
publisher
Optical Society of America
external identifiers
  • wos:000366681600006
  • scopus:84956606760
ISSN
0146-9592
DOI
10.1364/OL.40.005718
language
English
LU publication?
yes
id
e8211d2f-ecb8-4a8a-adfd-57c30b28f67e (old id 8548832)
date added to LUP
2016-01-28 10:25:34
date last changed
2017-04-23 03:55:02
@article{e8211d2f-ecb8-4a8a-adfd-57c30b28f67e,
  abstract     = {We report an innovative approach for time-domain measurements of S-branch Raman linewidths using hybrid picosecond/nanosecond pure-rotational coherent anti-Stokes Raman spectroscopy (RCARS). The Raman coherences are created by two picosecond excitation pulses and are probed using a narrow-band nanosecond pulse at 532 nm. The generated RCARS signal contains the entire coherence decay in a single pulse. By extracting the decay times of the individual transitions, the J-dependent Raman linewidths can be calculated. Self-broadened S-branch linewidths for nitrogen and oxygen at 293 K and ambient pressure are in good agreement with previous time-domain measurements. Experimental considerations of the approach are discussed along with its merits and limitations. The approach can be extended to a wide range of pressures and temperatures and has potential for simultaneous single-shot thermometry and linewidth determination. (C) 2015 Optical Society of America},
  author       = {Nordström, Emil and Hosseinnia, Ali and Brackmann, Christian and Bood, Joakim and Bengtsson, Per-Erik},
  issn         = {0146-9592},
  language     = {eng},
  number       = {24},
  pages        = {5718--5721},
  publisher    = {Optical Society of America},
  series       = {Optics Letters},
  title        = {Raman linewidth measurements using time-resolved hybrid picosecond/nanosecond rotational CARS},
  url          = {http://dx.doi.org/10.1364/OL.40.005718},
  volume       = {40},
  year         = {2015},
}