| Autor: |
Gillespie, Walter D., Hahn, Jae Won, Bowers, Walter J., Hurst, Wilbur S., Rosasco, Gregory J. |
| Zdroj: |
Applied Optics; January 1999, Vol. 38 Issue: 3 p534-544, 11p |
| Abstrakt: |
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 D_2 Raman Q-branch lines were made for a D_2 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. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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