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Title: Dispersive Fourier transformation for megahertz detection of coherent stokes and anti-stokes Raman spectra

In many fields of study, from coherent Raman microscopy on living cells to time-resolved coherent Raman spectroscopy of gas-phase turbulence and combustion reaction dynamics, the need for the capability to time-resolve fast dynamical and nonrepetitive processes has led to the continued development of high-speed coherent Raman methods and new high-repetition rate laser sources, such as pulse-burst laser systems. However, much less emphasis has been placed on our ability to detect shot to shot coherent Raman spectra at equivalently high scan rates, across the kilohertz to megahertz regime. This is beyond the capability of modern scientific charge coupled device (CCD) cameras, for instance, as would be employed with a Czerny-Turner type spectrograph. In this paper, as an alternative detection strategy with megahertz spectral detection rate, we demonstrate dispersive Fourier transformation detection of pulsed (~90 ps) coherent Raman signals in the time-domain. Instead of reading the frequency domain signal out using a spectrometer and CCD, the signal is transformed into a time-domain waveform through dispersive Fourier transformation in a long single-mode fiber and read-out with a fast sampling photodiode and oscilloscope. Molecular O- and S-branch rotational sideband spectra from both N 2 and H 2 were acquired employing this scheme, and themore » waveform is fitted to show highly quantitative agreement with a molecular model. Finally, the total detection time for the rotational spectrum was 20 ns, indicating an upper limit to the detection frequency of ~50 MHz, significantly faster than any other reported spectrally-resolved coherent anti-Stokes Raman detection strategy to date.« less
Authors:
 [1] ;  [1] ;  [1]
  1. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Publication Date:
Report Number(s):
SAND-2018-9955J
Journal ID: ISSN 0030-4018; 667783
Grant/Contract Number:
AC04-94AL85000
Type:
Accepted Manuscript
Journal Name:
Optics Communications
Additional Journal Information:
Journal Volume: 402; Journal ID: ISSN 0030-4018
Publisher:
Elsevier
Research Org:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; CARS; dispersive Fourier transformation; ultrafast spectroscopy; fiber detection
OSTI Identifier:
1473936

Bohlin, Alexis, Patterson, Brian D., and Kliewer, Christopher J.. Dispersive Fourier transformation for megahertz detection of coherent stokes and anti-stokes Raman spectra. United States: N. p., Web. doi:10.1016/j.optcom.2017.04.049.
Bohlin, Alexis, Patterson, Brian D., & Kliewer, Christopher J.. Dispersive Fourier transformation for megahertz detection of coherent stokes and anti-stokes Raman spectra. United States. doi:10.1016/j.optcom.2017.04.049.
Bohlin, Alexis, Patterson, Brian D., and Kliewer, Christopher J.. 2017. "Dispersive Fourier transformation for megahertz detection of coherent stokes and anti-stokes Raman spectra". United States. doi:10.1016/j.optcom.2017.04.049. https://www.osti.gov/servlets/purl/1473936.
@article{osti_1473936,
title = {Dispersive Fourier transformation for megahertz detection of coherent stokes and anti-stokes Raman spectra},
author = {Bohlin, Alexis and Patterson, Brian D. and Kliewer, Christopher J.},
abstractNote = {In many fields of study, from coherent Raman microscopy on living cells to time-resolved coherent Raman spectroscopy of gas-phase turbulence and combustion reaction dynamics, the need for the capability to time-resolve fast dynamical and nonrepetitive processes has led to the continued development of high-speed coherent Raman methods and new high-repetition rate laser sources, such as pulse-burst laser systems. However, much less emphasis has been placed on our ability to detect shot to shot coherent Raman spectra at equivalently high scan rates, across the kilohertz to megahertz regime. This is beyond the capability of modern scientific charge coupled device (CCD) cameras, for instance, as would be employed with a Czerny-Turner type spectrograph. In this paper, as an alternative detection strategy with megahertz spectral detection rate, we demonstrate dispersive Fourier transformation detection of pulsed (~90 ps) coherent Raman signals in the time-domain. Instead of reading the frequency domain signal out using a spectrometer and CCD, the signal is transformed into a time-domain waveform through dispersive Fourier transformation in a long single-mode fiber and read-out with a fast sampling photodiode and oscilloscope. Molecular O- and S-branch rotational sideband spectra from both N2 and H2 were acquired employing this scheme, and the waveform is fitted to show highly quantitative agreement with a molecular model. Finally, the total detection time for the rotational spectrum was 20 ns, indicating an upper limit to the detection frequency of ~50 MHz, significantly faster than any other reported spectrally-resolved coherent anti-Stokes Raman detection strategy to date.},
doi = {10.1016/j.optcom.2017.04.049},
journal = {Optics Communications},
number = ,
volume = 402,
place = {United States},
year = {2017},
month = {7}
}