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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 29 — Oct. 10, 2011
  • pp: 5688–5694

Diagnostic study of four-wave-mixing-based electric-field measurements in high- pressure nitrogen plasmas

Walter R. Lempert, Sean P. Kearney, and Edward V. Barnat  »View Author Affiliations


Applied Optics, Vol. 50, Issue 29, pp. 5688-5694 (2011)
http://dx.doi.org/10.1364/AO.50.005688


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Abstract

We present the results of a diagnostic study of the use of coherent four wave mixing for in situ measurement of an electric field in air or in nitrogen-containing plasmas. Static electric fields in air at a nominal pressure of 625 Torr and temperature of 300 K are detected using vibrational CARS of nitrogen. It is shown that the ratio of the infrared signal to the vibrational N 2 CARS signal is equal to approximately 10 8 at 8.33 kV / cm , a factor of approximately 50 less than that predicted assuming equal third-order nonlinear susceptibilities. It is also shown that the spatial resolution of a typical collinear geometry measurement is approximately 1 cm . Finally, it is shown that achieving sensitivities of the order of 1 kV / cm requires that the coherent Raman pumping be performed in the highly saturated and Stark broadened regime.

© 2011 Optical Society of America

OCIS Codes
(190.1900) Nonlinear optics : Diagnostic applications of nonlinear optics
(300.6290) Spectroscopy : Spectroscopy, four-wave mixing
(190.4223) Nonlinear optics : Nonlinear wave mixing
(280.5395) Remote sensing and sensors : Plasma diagnostics

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: May 10, 2011
Manuscript Accepted: June 28, 2011
Published: October 6, 2011

Citation
Walter R. Lempert, Sean P. Kearney, and Edward V. Barnat, "Diagnostic study of four-wave-mixing-based electric-field measurements in high-pressure nitrogen plasmas," Appl. Opt. 50, 5688-5694 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-29-5688

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