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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry M. Van Driel
  • Vol. 24, Iss. 9 — Sep. 1, 2007
  • pp: 2040–2045

Stimulated Rayleigh and Brillouin scattering in a supercritical fluid

Konstantinos S. Kalogerakis, Benjamin H. Blehm, Rachel E. Forman, Christian Jirauschek, and Gregory W. Faris  »View Author Affiliations


JOSA B, Vol. 24, Issue 9, pp. 2040-2045 (2007)
http://dx.doi.org/10.1364/JOSAB.24.002040


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Abstract

We report stimulated Brillouin and Rayleigh scattering experiments in n-hexane for a wide range of subcritical and supercritical temperature and pressure conditions, including the near-critical region. The measurements were performed in a cell designed for operation at conditions near or above the critical point. An injection-seeded Nd:YAG laser was employed as the pump laser and an external cavity diode laser as the probe laser. The use of 1064 - nm light enhances stimulated Rayleigh scattering through direct thermal absorption. Analysis of the recorded spectra yielded the widths, shifts, and heights of the electrostrictive Brillouin, thermal Brillouin, and thermal Rayleigh peaks. Comparison of these features with theory has showed consistency with the theoretical predictions of the relationships between the heights and widths of the thermal Brillouin and thermal Rayleigh peaks. Remarkable structure and sudden changes in the behavior of the Brillouin shifts, widths, and heights were observed in the vicinity of the critical region.

© 2007 Optical Society of America

OCIS Codes
(190.1900) Nonlinear optics : Diagnostic applications of nonlinear optics
(290.5870) Scattering : Scattering, Rayleigh
(290.5900) Scattering : Scattering, stimulated Brillouin

ToC Category:
Scattering

History
Original Manuscript: September 19, 2006
Revised Manuscript: February 26, 2007
Manuscript Accepted: March 2, 2007
Published: July 13, 2007

Citation
Konstantinos S. Kalogerakis, Benjamin H. Blehm, Rachel E. Forman, Christian Jirauschek, and Gregory W. Faris, "Stimulated Rayleigh and Brillouin scattering in a supercritical fluid," J. Opt. Soc. Am. B 24, 2040-2045 (2007)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-24-9-2040

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