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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 38, Iss. 3 — Jan. 20, 1999
  • pp: 534–544

Broadband D2 Coherent Anti-Stokes Raman Spectroscopy for Single-Shot Pressure and Temperature Determination with a Fabry-Perot Etalon

Walter D. Gillespie, Jae Won Hahn, Walter J. Bowers, Wilbur S. Hurst, and Gregory J. Rosasco  »View Author Affiliations


Applied Optics, Vol. 38, Issue 3, pp. 534-544 (1999)
http://dx.doi.org/10.1364/AO.38.000534


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Abstract

A method is demonstrated that employs a Fabry–Perot etalon to modulate a broadband coherent anti-Stokes Raman spectroscopy signal beam spatially to obtain enhanced resolution and spectral information for single-shot measurements of pressure and temperature. Resulting images are analyzed by; first, fits to Fabry–Perot patterns for single rovibrational lines; second, a line-shape analysis for a single rovibrational line; and third, a mapping of the Fabry–Perot channel spectra to a linear spectrum. Measurements of the D2 Raman Q-branch lines were made for a D2 in Ar mixture to take advantage of the large pressure shift and rovibrational line spacing. Peaks are located to better than 0.5% of the free spectral range of the etalon (approximately 0.01 cm−1) and a quantitative analysis of the pressure shifting and broadening is determined for the 1–10-MPa range. Finally, temperature and pressure determination using a band-fitting analysis is demonstrated.

© 1999 Optical Society of America

OCIS Codes
(020.3690) Atomic and molecular physics : Line shapes and shifts
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(190.1900) Nonlinear optics : Diagnostic applications of nonlinear optics
(190.5650) Nonlinear optics : Raman effect
(300.6230) Spectroscopy : Spectroscopy, coherent anti-Stokes Raman scattering

Citation
Walter D. Gillespie, Jae Won Hahn, Walter J. Bowers, Wilbur S. Hurst, and Gregory J. Rosasco, "Broadband D2 Coherent Anti-Stokes Raman Spectroscopy for Single-Shot Pressure and Temperature Determination with a Fabry-Perot Etalon," Appl. Opt. 38, 534-544 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-3-534

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