Absolute Two-Photon Excitation Cross-Sections In NO

J. Burris; T. McGee; T. McIlrath

doi:10.1117/12.943097

28 June 1984 Absolute Two-Photon Excitation Cross-Sections In NO

J. Burris, T. McGee, T. McIlrath

Proceedings Volume 0482, Applications of Laser Chemistry & Diagnostics; (1984) https://doi.org/10.1117/12.943097
Event: 1984 Technical Symposium East, 1984, Arlington, United States

Abstract

A technique has been developed which allows the determination of a two-photon absorption cross-section to be made relative to the Raman scattering cross-section in nitrogen. Spatial and temporal effects associated with the lasers are ratioed out to give a result in-dependent of laser parameters. The necessary theory to extract a cross-section from the measured ratio of a Coherent Anti-Stokes Raman Scattering (CARS) signal in N₂ to a four-wave mixing signal in NO has been developed. The technique has been demonstrated on the R22 S12(J" = 9 1/2) line in NO and a cross-section of (2.9 + 1.8) x 10-49 cm4-s was determined. This technique appears to be applicable to a number of other diatomic molecules.

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J. Burris, T. McGee, and T. McIlrath "Absolute Two-Photon Excitation Cross-Sections In NO", Proc. SPIE 0482, Applications of Laser Chemistry & Diagnostics, (28 June 1984); https://doi.org/10.1117/12.943097

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